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Maillet, Daniel Stewart. "Nuclear organization in Zea mays L". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58406.pdf.
Pełny tekst źródłaSouthgate, Elizabeth M. "Genetic manipulation of Zea mays L". Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319613.
Pełny tekst źródłaKerbach, Sandra. "Sequenz-spezifische Rekombination in Zea mays L". [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974050342.
Pełny tekst źródłaChou, Tau-San Weber David F. "Sister chromatid exchanges in Zea mays L". Normal, Ill. Illinois State University, 1985. http://wwwlib.umi.com/cr/ilstu/fullcit?p8514768.
Pełny tekst źródłaTitle from title page screen, viewed June 7, 2005. Dissertation Committee: David F. Weber (chair), Herman Brockman, Tsan Iang Chuang, Alan Katz, Derek McCracken. Includes bibliographical references (leaves 118-142) and abstract. Also available in print.
Bauer, Matthew J. "The interploidy hybridization barrier in Zea Mays L". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4448.
Pełny tekst źródłaThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 31, 2007) Includes bibliographical references.
Briars, Sally-Anne. "The calmodulin stimulated ATPase of Zea mays L". Thesis, University of Oxford, 1989. http://ora.ox.ac.uk/objects/uuid:afa92f78-633d-4ae5-8cf5-37ac077acab2.
Pełny tekst źródłaAraya, Frías María José. "Variabilidad Morfológica en Maíz Choclero ( Zea mays L.)". Tesis, Universidad de Chile, 2008. http://repositorio.uchile.cl/handle/2250/101696.
Pełny tekst źródłaSimoni, Fabiana De [UNESP]. "Deterioração controlada em sementes de milho (Zea mays L.)". Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/96811.
Pełny tekst źródłaEsta pesquisa foi realizada no Laboratório de Análise de Sementes do Departamento de Produção Vegetal da Faculdade de Ciências Agrárias e Veterinárias/UNESP, Câmpus de Jaboticabal, com o objetivo de avaliar a qualidade fisiológica das sementes de milho através dos testes de germinação e vigor: envelhecimento acelerado (EA), condutividade elétrica (CE), teste de frio (TF), emergência em campo (EC), índice de velocidade de emergência (IVE) e também verificar se o teste de deterioração controlada (DC) é eficaz em diferenciar lotes de sementes quanto aos seus respectivos níveis de vigor. Foram utilizados cinco lotes de sementes de milho, obtidos da Syngenta Seeds - Matão-SP. A germinação e o vigor dos lotes de sementes de milho foram avaliados antes do armazenamento, e a três e seis meses após o armazenamento. O teor de água das sementes foi determinado na caracterização inicial dos lotes e após o envelhecimento acelerado e a deterioração controlada. Para a análise estatística utilizou-se o delineamento inteiramente casualizado em esquema fatorial, com quatro repetições, e a comparação das médias foi feita usando-se o teste de Tukey ao nível de 5% de probabilidade. Foram determinados também os coeficientes de correlação (r) entre os testes de vigor utilizados e o teste de deterioração controlada. De acordo com os resultados obtidos concluiu-se que: em geral o teste de deterioração controlada não foi eficiente em separar lotes de diferentes níveis de vigor de sementes de milho; considerando se o efeito da temperatura e o teor de água das sementes genericamente o que apresentou melhor resultado para o teste de deterioração controlada foi a temperatura de 41oC e o teor de água de 25%; foram observados apenas algumas correlações significativas, mas não consistentes entre o teste de deterioração controlada e os demais testes de vigor.
This research was carried out at the Seed Analysis Laboratory, Agronomy Department, Agriculture College, UNESP - University, Campus of Jaboticabal, São Paulo State, Brazil. The objective of this research was to evaluate the corn seed physiological quality through the germination and vigor tests: cold test (CT), accelerated ageing (AA), field emergence (FE), speed of emergence index (SEI), and also to verify if the controlled deterioration test (CD) could be efficient in separating seed lots in different vigor levels. Five seed lots with diverse vigor levels were obtained from the Syngenta Seed Company, Matão, São Paulo State, Brazil. The germination and vigor of the corn seeds were evaluated before storage and three and six months after storage. The moisture content was characterized unitially and after the accelerated and controlled deterioration test. The esperimental design used was a complete randomized with a factorial arrangement of treatments with four replications. For the mean comparison was used the Tukey test at 5% level of probability, and also were computed the correlation coefficient between the vigor tests in relation to the controlled deterioration test. According to the obtained results was concluded that : in general the controlled deterioration test was not efficient in separating different levels of vigor of corn seeds; considering the effect of temperature and the seed moisture content in a general way the best results for the controlled deterioration test were the temperature of 41oC and the seed moisture content of 25%; were observed only some significative but not consistent correlation between the controlled deterioration test and the other vigor tests.
Simoni, Fabiana De. "Deterioração controlada em sementes de milho (Zea mays L.) /". Jaboticabal : [s.n.], 2003. http://hdl.handle.net/11449/96811.
Pełny tekst źródłaBanca: Francisco Humberto Dubbern de Souza
Banca: Silvio Moure Cícero
Resumo: Esta pesquisa foi realizada no Laboratório de Análise de Sementes do Departamento de Produção Vegetal da Faculdade de Ciências Agrárias e Veterinárias/UNESP, Câmpus de Jaboticabal, com o objetivo de avaliar a qualidade fisiológica das sementes de milho através dos testes de germinação e vigor: envelhecimento acelerado (EA), condutividade elétrica (CE), teste de frio (TF), emergência em campo (EC), índice de velocidade de emergência (IVE) e também verificar se o teste de deterioração controlada (DC) é eficaz em diferenciar lotes de sementes quanto aos seus respectivos níveis de vigor. Foram utilizados cinco lotes de sementes de milho, obtidos da Syngenta Seeds - Matão-SP. A germinação e o vigor dos lotes de sementes de milho foram avaliados antes do armazenamento, e a três e seis meses após o armazenamento. O teor de água das sementes foi determinado na caracterização inicial dos lotes e após o envelhecimento acelerado e a deterioração controlada. Para a análise estatística utilizou-se o delineamento inteiramente casualizado em esquema fatorial, com quatro repetições, e a comparação das médias foi feita usando-se o teste de Tukey ao nível de 5% de probabilidade. Foram determinados também os coeficientes de correlação (r) entre os testes de vigor utilizados e o teste de deterioração controlada. De acordo com os resultados obtidos concluiu-se que: em geral o teste de deterioração controlada não foi eficiente em separar lotes de diferentes níveis de vigor de sementes de milho; considerando se o efeito da temperatura e o teor de água das sementes genericamente o que apresentou melhor resultado para o teste de deterioração controlada foi a temperatura de 41oC e o teor de água de 25%; foram observados apenas algumas correlações significativas, mas não consistentes entre o teste de deterioração controlada e os demais testes de vigor.
Abstract: This research was carried out at the Seed Analysis Laboratory, Agronomy Department, Agriculture College, UNESP - University, Campus of Jaboticabal, São Paulo State, Brazil. The objective of this research was to evaluate the corn seed physiological quality through the germination and vigor tests: cold test (CT), accelerated ageing (AA), field emergence (FE), speed of emergence index (SEI), and also to verify if the controlled deterioration test (CD) could be efficient in separating seed lots in different vigor levels. Five seed lots with diverse vigor levels were obtained from the Syngenta Seed Company, Matão, São Paulo State, Brazil. The germination and vigor of the corn seeds were evaluated before storage and three and six months after storage. The moisture content was characterized unitially and after the accelerated and controlled deterioration test. The esperimental design used was a complete randomized with a factorial arrangement of treatments with four replications. For the mean comparison was used the Tukey test at 5% level of probability, and also were computed the correlation coefficient between the vigor tests in relation to the controlled deterioration test. According to the obtained results was concluded that : in general the controlled deterioration test was not efficient in separating different levels of vigor of corn seeds; considering the effect of temperature and the seed moisture content in a general way the best results for the controlled deterioration test were the temperature of 41oC and the seed moisture content of 25%; were observed only some significative but not consistent correlation between the controlled deterioration test and the other vigor tests.
Mestre
Garg, Preeti. "Molecular characterisation of the et1 gene of Zea mays L". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=969501099.
Pełny tekst źródłaHodges, D. Mark. "Chilling effects on antioxidant systems of maize (Zea mays L.)". Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9830.
Pełny tekst źródłaLa, Hovary Christophe. "Le désherbage mécanique complet dans le maïs, Zea mays L". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ49031.pdf.
Pełny tekst źródłaJain, Jugnu. "Studies on the mitochondrial genome of maize (Zea mays L.)". Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315263.
Pełny tekst źródłaObeng-Antwi, Kwadwo. "Genetic Diversity in Maize (Zea mays L.) Landraces in Ghana". Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487481.
Pełny tekst źródłaAli, Rao Sajjad. "The potential for breeding Zea mays (L.) for saline conditions". Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387451.
Pełny tekst źródłaMoseki, Baleseng. "Photosynthetic characteristics of Zea mays L. cultivars at low temperature". Thesis, University of Essex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339401.
Pełny tekst źródłaMarshall, Jacqueline. "Calcium fluxes at the plasma membrane Zea Mays L. roots". Thesis, University of York, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304172.
Pełny tekst źródłaFerreira, Vitor Guerra [UNESP]. "Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.)". Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/134097.
Pełny tekst źródłaSendo uma planta originária das Américas, o cultivo de milho ocorre em todo território brasileiro, sendo que na maioria das regiões é realizado em duas épocas: primeira safra ou safra de verão e segunda safra ou safrinha. Embora o rendimento médio de milho no Brasil ainda seja considerado baixo em comparação com diversos países, tecnologias como o desenvolvimento de cultivares híbridas proporcionou aos produtores uma evolução considerável de rendimento. Entretanto, para que os níveis de rendimento possam continuar evoluindo gradativamente, o processo de obtenção de novas cultivares é continuamente executado pelos melhoristas. No caso do milho, os híbridos simples estão avançando rapidamente sobre os demais tipos de híbridos (triplos e duplos), em reconhecimento ao seu alto potencial de rendimento em cultivos tecnificados. O objetivo deste estudo foi identificar no final do processo completo da formação de híbridos, aqueles mais promissores e com características agronômicas de um híbrido moderno, entre 36 híbridos simples provenientes de linhagens de origem braquítica e de porte mais elevado. Os híbridos experimentais e mais seis testemunhas, foram avaliados em blocos casualizados com quatro repetições, na fazenda experimental da UNESP em Selvíria-MS em quatro épocas: primeira safra 2012/13 (primeira época), segunda safra 2012/2013 (segunda época), primeira safra 2013/14 (terceira época) e segunda safra 2013/2014 (quarta época). Foram avaliados os caracteres dias para florescimento feminino, altura de plantas, altura de espigas, comprimento de espigas, diâmetro de espigas, prolificidade, acamamento mais quebramento e rendimento de grãos. Para os híbridos comuns em todas as épocas, foi realizada uma análise de estabilidade e adaptabilidade de rendimento, pelo método de Herberhart e Russel (1966). Com base nas análises individuais e de estabilidade e...
Being a plant of the Americas, maize cultivation occurs throughout Brazil, and in most regions is carried out in two seasons: first crop or summer crop and second crop. Although the average of grain yield of maize in Brazil is still considered low, technologies such as the development of hybrid cultivars gave the producers a considerable increase of grain yield. However, so that grain yield can continue to evolve gradually, the process of obtaining new cultivars runs continuously by breeders. For maize, the single-cross hybrids are advancing rapidly over other types of hybrid (triple and double) in recognition of its high yield potential in technified crops. The objective of this study was to identify, at the end of the complete process of hybrids formation, those most promising and with agronomic characteristics of a modern hybrid, between 36 single-cross hybrids obtained from brachytic inbred lines and not brachytic inbred lines. The experimental hybrids and six checks were evaluated in a randomized block design with four replications, in Selvíria- MS in four seasons: 2012/13 first crop (season 1), 2012/2013 second crop (season 2), 2013/14 first crop (season 3) and 2013/2014 second crop (season 4). The evaluated traits were days to silking, plant height, ear height, ear length, ear diameter, prolificacy, lodged and broken plants and grain yield. For common hybrids in every season, an analysis of stability and adaptability for grain yield was carried out by the regression method of Heberhart and Rusell. Based on the individual and stability and adaptability analysis, there were identified the following hybrids with potential for evaluations in official testing for both first and second crop: IVF1-6/IVD1-3, 8F/9D, 8F/6D, IVF1- 5/IVD1-8, 5F/9D and 10F/9D. All showed good average for grain yield, stability and responded to the improvement of the environment, of which the first three are early. The ...
Ferreira, Vitor Guerra. "Caracterização de Híbridos Simples Experimentais de Milho (Zea Mays L.) /". Ilha Solteira, 2015. http://hdl.handle.net/11449/134097.
Pełny tekst źródłaBanca: Mario Luiz Teixeira da Moraes
Banca: Liliam Silvia Candido
Resumo: Sendo uma planta originária das Américas, o cultivo de milho ocorre em todo território brasileiro, sendo que na maioria das regiões é realizado em duas épocas: primeira safra ou safra de verão e segunda safra ou safrinha. Embora o rendimento médio de milho no Brasil ainda seja considerado baixo em comparação com diversos países, tecnologias como o desenvolvimento de cultivares híbridas proporcionou aos produtores uma evolução considerável de rendimento. Entretanto, para que os níveis de rendimento possam continuar evoluindo gradativamente, o processo de obtenção de novas cultivares é continuamente executado pelos melhoristas. No caso do milho, os híbridos simples estão avançando rapidamente sobre os demais tipos de híbridos (triplos e duplos), em reconhecimento ao seu alto potencial de rendimento em cultivos tecnificados. O objetivo deste estudo foi identificar no final do processo completo da formação de híbridos, aqueles mais promissores e com características agronômicas de um híbrido moderno, entre 36 híbridos simples provenientes de linhagens de origem braquítica e de porte mais elevado. Os híbridos experimentais e mais seis testemunhas, foram avaliados em blocos casualizados com quatro repetições, na fazenda experimental da UNESP em Selvíria-MS em quatro épocas: primeira safra 2012/13 (primeira época), segunda safra 2012/2013 (segunda época), primeira safra 2013/14 (terceira época) e segunda safra 2013/2014 (quarta época). Foram avaliados os caracteres dias para florescimento feminino, altura de plantas, altura de espigas, comprimento de espigas, diâmetro de espigas, prolificidade, acamamento mais quebramento e rendimento de grãos. Para os híbridos comuns em todas as épocas, foi realizada uma análise de estabilidade e adaptabilidade de rendimento, pelo método de Herberhart e Russel (1966). Com base nas análises individuais e de estabilidade e...
Abstract: Being a plant of the Americas, maize cultivation occurs throughout Brazil, and in most regions is carried out in two seasons: first crop or summer crop and second crop. Although the average of grain yield of maize in Brazil is still considered low, technologies such as the development of hybrid cultivars gave the producers a considerable increase of grain yield. However, so that grain yield can continue to evolve gradually, the process of obtaining new cultivars runs continuously by breeders. For maize, the single-cross hybrids are advancing rapidly over other types of hybrid (triple and double) in recognition of its high yield potential in technified crops. The objective of this study was to identify, at the end of the complete process of hybrids formation, those most promising and with agronomic characteristics of a modern hybrid, between 36 single-cross hybrids obtained from brachytic inbred lines and not brachytic inbred lines. The experimental hybrids and six checks were evaluated in a randomized block design with four replications, in Selvíria- MS in four seasons: 2012/13 first crop (season 1), 2012/2013 second crop (season 2), 2013/14 first crop (season 3) and 2013/2014 second crop (season 4). The evaluated traits were days to silking, plant height, ear height, ear length, ear diameter, prolificacy, lodged and broken plants and grain yield. For common hybrids in every season, an analysis of stability and adaptability for grain yield was carried out by the regression method of Heberhart and Rusell. Based on the individual and stability and adaptability analysis, there were identified the following hybrids with potential for evaluations in official testing for both first and second crop: IVF1-6/IVD1-3, 8F/9D, 8F/6D, IVF1- 5/IVD1-8, 5F/9D and 10F/9D. All showed good average for grain yield, stability and responded to the improvement of the environment, of which the first three are early. The ...
Mestre
Moulia, Bruno. "Etude mécanique du port foliaire du maïs (Zea mays L. )". Bordeaux 1, 1993. http://www.theses.fr/1993BOR10576.
Pełny tekst źródłaKrützfeldt, Birte A. E. "Untersuchungen zur Vererbung von Qualitätseigenschaften bei Silomais (Zea mays L.)". [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11259566.
Pełny tekst źródłaPedri, Marta Adriana. "A dinâmica do milho (Zea mays L.) nos agroecossistemas indígenas". Florianópolis, SC, 2006. http://repositorio.ufsc.br/xmlui/handle/123456789/88988.
Pełny tekst źródłaMade available in DSpace on 2012-10-22T15:36:36Z (GMT). No. of bitstreams: 1 233620.pdf: 2762661 bytes, checksum: d4482162cde4ce6105d55f06502935ea (MD5)
O crescimento da população indígena e a regularização de suas terras trazem demandas para o restabelecimento de práticas agrícolas tradicionais. O manejo tradicional do milho (Zea mays L.) em comunidades indígenas dos estados de Roraima e Santa Catarina apresenta um cenário de erosão genética e cultural. Nesse contexto, o presente trabalho busca compreender a relação histórica e cultural existente entre os grupos indígenas e o cultivo do milho. Foram utilizadas ferramentas de etnobotânica para entender a dinâmica do milho nos agroecossistemas indígenas. Em registros arqueológicos na América do Sul, a difusão inicial do milho coincide com a expansão da agricultura de grupos Jê. Uma segunda onda difundiu a tecnologia que permitiu a intensificação do milho e a complexificação social, coincidindo com a expansão Aruak e Tupi-Guarani. O cultivo do milho em aldeias Wapixana (Aruak), Macuxi, Taurepang, Waimiri Atroari (Karib), Kaingang, Xokleng (Jê) e Guarani (Tupi-Guarani) apresenta diferentes estágios do declínio da importância do milho. A perda de população e redes de troca de sementes, acréscimo de novas culturas como a banana, e o abandono de práticas religiosas tradicionais contribuem para esse declínio. Os Guarani mantem métodos tradicionais de manejo do milho, associados às práticas religiosas e cosmologia do grupo. A base genética deste manejo, deduzida de práticas observadas em Santa Catarina e registradas na literatura, consiste no manejo de populações de milho com cores diferentes no pericarpo e aleurona das sementes. Essas cores permitem visualizar as atividades de transposons- usinas moleculares de mutações- que geram diversidade alélica. Permitem ainda segregar e gerenciar a taxa de mutação em diferentes populações. A "religião do milho" dos Guarani pode ter sido a base tecnológica da intensificação do milho observado nos registros arqueológicos. The growth of indigenous population and the regularization of their lands bring demands for the reestablishment of traditional agriculture practices. The traditional management of maize (Zea mays L) by indigenous societies in Roraima and Santa Catarina states presents a scenario of cultural and genetic erosion . This work tries to understand the historical and cultural relationship between indigenous societies and the maize farm. I use ethnobotany methods to understand maize dynamics in indigenous agroecosystems. In archeological records in South America, the initial diffusion of maize coincides with Jê agriculture expansion. A second wave a technological change that permitted maize intensification and the social complexification, coinciding with the Aruak and Tupi-Guarani expansion. Maize farming in Wapixana (Aruak), Macuxi, Taurepang, Waimiri Atroari (Karib), Kaingang, Xokleng (Jê) e Guarani (Tupi-Guarani) villages represents different stages of decline in the importance of maize. The loss of population and seed exchange networks, inclusion of new crops like banana, and the erosion of traditional religious practices contribute to this decline. The Guarani people maintain traditional methods of maize management, associated with their religious practices and cosmology. The genetic basis of this management, deduced from practices observed in Santa Catarina and recorded in the literature, consists in the management of maize populations with different colors in the pericarp and aleurone of maize kernels. This colors permit visualization of transposons (molecular generators of mutations that create allelics diversity). This management permits the segregation of populations and management of mutation rate in different populations. The #maize religion# of the Guarani may be the technological basis of maize intensification observed in the archeological register.
Lama, Rohini. "Biochemical responses of maize (Zea mays L.) to water stress". Thesis, University of North Bengal, 2013. http://ir.nbu.ac.in/handle/123456789/963.
Pełny tekst źródłaEschholz, Tobias Wilhelm. "Genetic diversity and relationships of Swiss Flint maize (Zea mays L. ssp. mays) landraces". Tönning Lübeck Marburg Der Andere Verl, 2008. http://d-nb.info/988765594/04.
Pełny tekst źródłaDanker, Tanja. "Epigenetische Mechanismen zur Regulation der Transkription C₄-typischer Gene in Mais (Zea mays L.)". [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=983660387.
Pełny tekst źródłaAldon, Didier. "Evenements cellulaires et moleculaires associes a la fecondation chez le mais (zea mays l. )". Lyon, École normale supérieure (sciences), 1998. http://www.theses.fr/1998ENSL0088.
Pełny tekst źródłaRüegsegger, Adrian. "Einfluss von Cadmium aufd die Gluatathionsynthese von Mais (Zea mays L. cv LG 9) /". [S.l : s.n.], 1993. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Pełny tekst źródłaMayor, Maria Laura. "Genetic analysis of ear development and tassel architecture in maize (Zea mays L. ssp. mays)". [Ames, Iowa : Iowa State University], 2008.
Znajdź pełny tekst źródłaKirsch, Helene. "Molekulare Analyse der Chalkonsythasegene C2 und Whp aus Zea mays (L.)". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=965196933.
Pełny tekst źródłaSilveira, Flávio Trevizoli [UNESP]. "Herança da resistência ao complexo enfezamento em milho (Zea mays L.)". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/102831.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O complexo do enfezamento, que abrange os enfezamentos pálido (Spiroplasma kunkelli) e vermelho (Mayze bushy stunt phytoplasma) é causado por patógenos pertencentes à classe dos molicutes e transmitido pela cigarrinha Dalbulus maidis. Por ser o único hospedeiro dessa doença e do seu vetor e transmissor, têm-se observado elevados prejuízos em híbridos suscetíveis. O desenvolvimento de cultivares com resistência genética é a alternativa mais eficiente para o controle dessa doença. Para isso é necessário conhecer a herança da resistência para direcionar os métodos de seleção a serem empregados e os trabalhos de introdução da resistência em germoplasmas suscetíveis. Objetivando compreender a herança da resistência aos enfezamentos em milho, foram realizados trabalhos com linhagens de milho, mediande análise dialélica e médias de gerações. Para a análise dialélica foram utilizadas doze linhagens endogâmicas de milho, representada por quatro linhagens resistentes e oito linhagens suscetíveis, cruzando-se as resistentes com as suscetíveis em esquema de dialélico parcial. Para as análises de médias de gerações foram cruzadas três linhagens resistentes e quatro suscetíveis para a obtenção das gerações F1, F2, RCP1 e RCP2. Os trabalhos foram conduzidos em Jaboticabal (SP) e Guaíra (SP), avaliando, no estádio fenológico R3, a incidência de enfezamento. Efeitos significativos para CGC e CEC foram obtidos, indicando que, no controle do caráter enfezamentos, estão envolvidos tanto os efeitos aditivos como os de dominância. Análises de médias de gerações revelaram a presença de poucos genes envolvidos com o controle da resistência, com predominância de efeitos aditivos, o que permite a seleção de genótipos resistentes. As linhagens PH1894, PH1977 e PH1173-1 poderão ser utilizadas como fontes de resistência em futuras combinações híbridas.
The corn stunt complex, that embraces the pale corn stunt (Spiroplasma kunkelli) and red (Mayze bushy stunt phytoplasma) it is caused by patógenos belonging to the class of the molicutes and transmitted by the cicada Dalbulus maidis. For being the only host of that disease and of your vector and transmitter, high damages have been observing in hybrid susceptible. The development of you cultivate with genetic resistance it is the most efficient alternative for the control of that disease. For that it is necessary to know the inheritance of the resistance to address the selection methods they be her used and the works of introduction of the resistance in susceptible germoplasmas. Aiming at to understand the inheritance of the resistance to the corn stunt, works were accomplished with corn lineages, trough analysis dialélica and averages of generations. For the analysis dialélica twelve inbred lines of corn were used, represented by four resistant inbred lines and eight susceptible inbred lines, crossing the resistant ones with the susceptible ones in outline of partial dialélico. For the analyses of averages of generation three resistant inbred lines and four were crossed susceptible for the obtaining of the generations F1, F2, RCP1 and RCP2. The works were led in Jaboticabal (SP) and Guaíra (SP), evaluating, in the stadium fenológico R3, the corn stunt incidence. Significant effects for CGC and CEC were obtained, indicating that, in the control of the character corn stunt, they are involved as much the addictive effects as the one of dominance. Analyses of averages of generations revealed the presence of few genes involved with the control of the resistance, with predominance of addictive effects, what allows the selection of resistant genotypes. The inbred lines PH1894, PH1977 and PH1173-1 can be used as resistance sources in future hybrid combinations.
Azar, Christian. "Characterization of white floury corn (Zea mays L.) landraces of Ontario". Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23867.
Pełny tekst źródłaMelville, Sara E. "The linear plasmids of the S-cytoplasm of Zea Mays (L.)". Thesis, Open University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292362.
Pełny tekst źródłaBarbosa, Mauricio Pires Machado. "Variabilidade patogênica de Colletotrichum graminicola isolado de milho (Zea mays L.)". Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-02082002-150304/.
Pełny tekst źródłaAnthracnose leaf blight and stalk rot of corn are importa nt diseases in maize caused by Colletotrichum graminicola, and are considered to be very important in production corn areas throughout the world and Brazil. The control is based only on genetic resistance. The effectiveness of genetic resistance to control plant diseases depends on the existence of races of pathogens, able overcome them. Trials to study pathogenic and genetic variability of Colletotrichum graminicola from maize were done using isolates from brazilian states Minas Gerais, Goiás, Mato Grosso do Sul, São Paulo and Maranhão. Isolates were geneticaly compared using RAPDs molecular markers. After clustering, five isolates were choosen in order to conduct virulence and agressiveness experiments in maize inbred lines. Trials were conducted in field for evaluation of stalk rot and at green house to evaluate anthracnose leaf blight. Field trials did not show diferential interaction between isolates and host genotypes, neither studing anthracnose leaf blight, nor anthracnose stalk rot, driven to conclusion that, for genotypes and isolates used in this study, we're not able to identificate races of Colletotrichum graminicola. There was no correlation between stalk lesion area and leaf blighted area, showing that genetic resistance pathways were different.
Lavendowski, Izabel Maura de Farias. "Alocação diferencial de recursos em populações de milho (Zea mays L.)". Universidade de São Paulo, 1987. http://teses.usp.br/teses/disponiveis/11/11137/tde-20181127-155754/.
Pełny tekst źródłaThe objective of the present work was the study of the differential distribution of resources among vegetative and reproductive organs of the maize plant in the local variety ESALQ PBI and in segragation populations resulting from the cross between ESALQ-PBI and the Brazilian races named CRAVO and ENTRELAÇADO. Ninety eight ha1f-sib families from each population were evaluated in 1983/84 at Piracicaba (SP) , in two 7x7 triple lattice experiments. Five competitiveplants from each plot were used to measure the following traits: dry weight of stalk and leaves (PMSCF), tassel dry weight (PMSPE), cob dry weight (PMSSA), husk dry weight (PMSPA), seed dry weight (PMSSE), Harvest Index, total dry weight, except root system (PMSTT) i and their respective indices: PMSCF/PMSTT, PMSPE/PMSTT, PMSSA/PMSTT, PMSPA/PMSTT, PMSSE/PMSTTi among them, the index ((PMSPE + PMSPA + PMSSA ++ PMSSE)/PMSTT), called Reproductive Effot, was included. Data on phenology of the maize plant were included in order to get some additional information on population fitness, thus, the number of days to tassel and the numberof leaves above and below the ear, were taken for this purpose. The distribution of family means(histograms) for the several traits and indices showed to be differentiated among populations respective to the direction and leveI of skewness from the several traits and indices. The results lead to the conclusion that the local varietyESALQ PBl showed a more remarkable tendency to strategist Γ(PIANKA, 1970) than the others. On the other hand in the population ESALQ-PBl x ENTRELAÇADO the reproduvtive effort was less expressive than in the maize ENTRELAÇADO by the indians of the Amazon Basin; such a selection would not greatly emphasize seed production as in modern maize breed ing but rather had the objective to get seed supplies from a maize plant grown under natural conditions. Respective to days to flower the population ESALQ-PBI x ENTRELAÇADO showed to be the latest on and ESALQ-PBl x CRAVO the earliest. Such a differentiationwas due to the lateness and earliness of the respective parental races. The overall results showed the importanceof studies on the relative allocation of resources in the maize plant for breeding purposes. On the other hand,they are a contribution for the knowledge of the genetic structure of the segregation populations and their value for breeding purposes, when the aim of selection is the identification of superior progenies under different leveIs of envirronment disturbance and when the pIastic and genetic components of the reproductive effort must be better known.
Godoi, Rubens Eric Zanovello de. "Avaliação de progênies de milho (Zea mays L.) utilizando testemunha intercalar". Universidade de São Paulo, 1991. http://teses.usp.br/teses/disponiveis/11/11137/tde-20181127-161316/.
Pełny tekst źródłaThe aim of this work is to compare traditional methodology and an inter-row control methodology for the evaluation of maize families. One hundred half-sib families of the ESALQ-VD-2-wx maize composite and a simple hybrid as control were used. These families were evaluated by two distinct procedures. In the first procedure the families were evaluated in normal lattice, in experiments with two, four and six replicates, while in the other procedure the same families were evaluated in inter-row control lattice, in experiments with two replicates. The 100 families were grouped into four classifications. The three first classifications was obtained from the normal lattice experiments and the fourth from the inter-row control lattice experiments. The experiments presented a coefficient of variation between 6 and 19% and a loss of stand around 30% for each plot, which resulted in non-consistent classifications of the family mean values. Therefore, it was not possible to make a precise comparison of the two methodologies for the evaluation of families. In spite of this, the inter-row methodology is a promising technique with respect to the principle in use, and which may serve as a reference for the selection of families as to diverse agronomical traits of interest
Silveira, Flávio Trevizoli. "Herança da resistência ao complexo enfezamento em milho (Zea mays L.) /". Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/102831.
Pełny tekst źródłaAbstract: The corn stunt complex, that embraces the pale corn stunt (Spiroplasma kunkelli) and red (Mayze bushy stunt phytoplasma) it is caused by patógenos belonging to the class of the molicutes and transmitted by the cicada Dalbulus maidis. For being the only host of that disease and of your vector and transmitter, high damages have been observing in hybrid susceptible. The development of you cultivate with genetic resistance it is the most efficient alternative for the control of that disease. For that it is necessary to know the inheritance of the resistance to address the selection methods they be her used and the works of introduction of the resistance in susceptible germoplasmas. Aiming at to understand the inheritance of the resistance to the corn stunt, works were accomplished with corn lineages, trough analysis dialélica and averages of generations. For the analysis dialélica twelve inbred lines of corn were used, represented by four resistant inbred lines and eight susceptible inbred lines, crossing the resistant ones with the susceptible ones in outline of partial dialélico. For the analyses of averages of generation three resistant inbred lines and four were crossed susceptible for the obtaining of the generations F1, F2, RCP1 and RCP2. The works were led in Jaboticabal (SP) and Guaíra (SP), evaluating, in the stadium fenológico R3, the corn stunt incidence. Significant effects for CGC and CEC were obtained, indicating that, in the control of the character corn stunt, they are involved as much the addictive effects as the one of dominance. Analyses of averages of generations revealed the presence of few genes involved with the control of the resistance, with predominance of addictive effects, what allows the selection of resistant genotypes. The inbred lines PH1894, PH1977 and PH1173-1 can be used as resistance sources in future hybrid combinations.
Orientador: José Roberto Môro
Coorientador: Herberte Pereira da Silva
Banca: Ricardo Machado da Silva
Banca: Josué Maldonado Ferreira
Banca: Domingos Fornasieri Filho
Banca: Rinaldo César de Paula
Doutor
Lauga, Béatrice. "Etude génétique et moléculaire de déficiences polliniques chez Zea mays L". Pau, 1996. http://www.theses.fr/1996PAUU3040.
Pełny tekst źródłaMica, E. "Characterization of miRNA families in Zea mays L. and Arabidopsis thaliana". Doctoral thesis, Università degli Studi di Milano, 2006. http://hdl.handle.net/2434/62648.
Pełny tekst źródłaPea, G. "Addressing the molecular bases of heterosis in maize (Zea mays L.)". Doctoral thesis, Università degli Studi di Milano, 2004. http://hdl.handle.net/2434/58249.
Pełny tekst źródłaFreitas, Fábio de Oliveira. "Estudo genético-evolutivo de amostras modernas e arqueológicas de milho (Zea mays mays, L.) e feijão (Phaseolus vulgaris, L.)". Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-02072002-093356/.
Pełny tekst źródłaSeven archaeological samples of maize (Zea mays mays, Lineu), 620±60 to 990±60 years old and one sample of bean (Phaseolus vulgaris, Lineu), 301 ± 39 years old (based on C14 datation), were studied by biomolecular techniques to understand their historical origin. They were found in indigenous subterranean silos, from archaeological sites at Januária (Peruaçu Valley), state of Minas Gerais, Brazil. A segment of the nuclear gene encoding alcohol dehydrogenase 2 (Adh2) was amplified and sequenced from extracts of the maize specimens. In the bean sample, two portions of the nuclear gene encoding the protein Phaseolin were used. In maize, 3 main alele groups were observed for the Adh 2 previously know in the maize origin center in the Central America. In the South America, these groups have also been founded but presenting a characteristic geographical distribution. One of the aleles, considered the most primitive, occurs in the Andean highlands. The other two are present mainly in lowlands, one of them restrict to São Francisco and Paraná-Paraguai rivers basin, along the Atlantic coast. These dates suggest that, historically, different maize varieties were introduced in South America, perhaps in two different periods and spread to distinct regions by migrating or trading human populations. The first introduction is estimated to have occurred about 5,000 years ago, and the second and possibly a third, about 3,000 years later. These introductions must be responsible for the high-/lowland distribution pattern, which maintains up to today. The European colonisation of the South America in the 15-16th century kept this pattern. Portugal conquered the lowlands and Spain the highlands and they maintained a cultural and trade barrier for long time. However in the Southern part of South America there must have been some exchange, since aleles from lowlands were found in archaeological sites in highlands of Chile, and conversely, highland aleles were present in one modern indigenous sample from Paraguay. It should be mentioned that archaeological and modern aleles found in Peru are remarkably different from those of Brazil. This would mean that Brazilian indigenous populations must have been more influenced by Central America culture, rather than from that of Andean highlands. In the case of Januária bean sample, identified as Phaseolus vulgaris, presents the basic genetic type of the Phaseolin of type a. The alleles from modern samples from Mexico to Argentina, indicate a geographical distribution pattern. The alleles originated from Mexico to the Northern region of South America (Colombia, Ecuador and North of Peru) fall in the same group, what we called Northern alleles group, while those from Southern Peru to Argentina fall in another group, that we called Southern alleles group. Apparently Northern group of alleles are older, pointing the corresponding region as the centre of the origin for Phaseolus vulgaris. Southern group of alleles must have been derived from those from the North. This confronts some theories suggesting that bean might have had more than one centre of origin, independently. The Januária sample had six different alleles, two identical to the Northern group. Of the remaining four, two are very close to the Northern group, while the other two may be considered intermediary. No allele similar to the Southern group was found. The conclusion is that the bean sample from Januária is genetically closer to the Northern populations but has vestiges of contacts with populations from Centre and Southern Andes. All put together, maize and beans populations from Januária seem to had a lager relation or influence of materials originating with those from Central Andes, as Peru. Also, a higher genetic diversity was observed within bean genes than maize. Finally, this research demonstrated that plant archaeological samples from the Tropics may contain well preserved genetic material suitable for evolutionary studies and provide data to understand the life history of the Humanity in the Americas.
Mao, Jingqin. "Improved resistance to insects in maize (Zea mays L) and cowpea (Vigna unguiculata L)". Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27152.
Pełny tekst źródłaSchreiber, Daniela. "Analyse des Promotors und der Funktion des MADS-Box-Transkriptionsfaktors ZmMADS2 aus Zea mays L". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967768349.
Pełny tekst źródłaAmien, Suseno [Verfasser]. "Funktionelle Analyse und biotechnologische Anwendung der ZmES-Gene aus Mais (Zea mays L.) / Suseno Amien". Aachen : Shaker, 2003. http://d-nb.info/1170541933/34.
Pełny tekst źródłaMollier, Alain. "Croissance racinaire du mais (zea mays l. ) sous deficience en phosphore. Etude experimentale et modelisation". Paris 11, 1999. http://www.theses.fr/1999PA112046.
Pełny tekst źródłaCHICHA, AHMED. "Etude de la biosynthese des especes moleculaires de phosphoinositides chez le mais (zea mays, l. )". Paris 6, 1994. http://www.theses.fr/1994PA066525.
Pełny tekst źródłaNais, Juliana [UNESP]. "Infestação de Spodoptera frugiperda e Helicoverpa zea (Lepidoptera: Noctuidae) em híbridos comerciais de milho (Zea mays L.)". Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/102279.
Pełny tekst źródłaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O milho é uma das plantas domesticadas pelo homem mais antigas do mundo e sua produção se torna ameaçada diante do ataque de pragas. Dentre elas destacam-se a lagarta-do-cartucho Spodoptera frugiperda e a lagarta-da-espiga Helicoverpa zea. A S. frugiperda ataca preferencialmente o cartucho das plantas consumindo grande parte da área foliar antes de as folhas se desenvolverem. A H. zea é referida prejudicando a cultura atacando os estilo-estigmas e alimentando-se dos grãos leitosos. Para promover o manejo dessas pragas com a mínima utilização de agrotóxicos, a tecnologia das plantas geneticamente modificadas tem sido objeto de estudos. Neste trabalho, os objetivos foram avaliar a infestação de lagartas e injúrias de S. frugiperda e determinar o comportamento de oviposição, intensidade de infestação, danos nos estilo-estigmas e espigas provocados por H. zea em condições de campo, em híbridos convencionais e transgênicos. Os híbridos foram semeados na safrinha de 2010 e na safra de 2010/2011, em delineamento de blocos ao acaso, com sete tratamentos (híbridos) e quatro repetições. Diferentes níveis de infestação ocorreram durante os experimentos nos híbridos Bt e não Bt. O híbrido 2B710HX foi o menos infestado com lagartas de S. frugiperda e o menos danificado, o que se conclui que a expressão da toxina Cry1F foi a mais efetiva na proteção da planta, independente da época de semeadura. Os híbridos que expressam a toxina Cry1Ab e Cry1F foram os mais efetivos no controle da H. zea em Jaboticabal, independente da época de semeadura. Em Pindorama, SP, a toxina Cry1F apresentaram bons resultados contra a infestação de lagartas
The maize is a plant domesticated by humans world’s oldest and your production becomes threatened before the attack of pests. Among the pest that attack maize stand out the fall armyworn Spodoptera frugiperda and the bollworm Helicoverpa zea. S. frugiperda attacks preferably the maize plants consuming much of the leaf area before the leaves develop. H. zea hurting the culture attacking style-stigma and destroying the mand. In order to promote the management of these pests with minimal use of pesticides, the technology of genetically modified plants has been the subject of many studies. In this paper, the objective was to evaluate the infestation and injuries of S. frugiperda and determine the oviposition behavior, intensity of infestation, damage to the style-stigma and in ear caused by H. zea in field conditions in conventional and transgenic maize hybrids. The hybrids were planted in the harvest in the summer of 2010 and in harvest 2010/2011, in a randomized blocks with seven treatments (hybrids) and four replications. Different levels of infestation of larvae occurred throughout the development of conventional and transgenic hybrids. The hybrid 2B710HX was the least infested with larvae of S. frugiperda and the least damaged, which concludes that the Cry1F toxin was the most effective in protecting the plant, regardless of time of sowing. The hybrids expressing the Cry11Ab and Cry1F toxin were most effective in controlling H. zea in Jaboticabal, SP, regardless of sowing time. In Pindorama, SP, toxin Cry1F showed good results against the infestation of caterpillars
Nais, Juliana. "Infestação de Spodoptera frugiperda e Helicoverpa zea (Lepidoptera: Noctuidae) em híbridos comerciais de milho (Zea mays L.) /". Jaboticabal : [s.n.], 2012. http://hdl.handle.net/11449/102279.
Pełny tekst źródłaCoorientador: Marcos Doniseti Michelotto
Banca: Aildson Pereira Duarte
Banca: Julio César Guerreiro
Banca: Arlindo Leal Boiça Júnior
Banca: Ricardo Antonio Polanczyk
Resumo: O milho é uma das plantas domesticadas pelo homem mais antigas do mundo e sua produção se torna ameaçada diante do ataque de pragas. Dentre elas destacam-se a lagarta-do-cartucho Spodoptera frugiperda e a lagarta-da-espiga Helicoverpa zea. A S. frugiperda ataca preferencialmente o cartucho das plantas consumindo grande parte da área foliar antes de as folhas se desenvolverem. A H. zea é referida prejudicando a cultura atacando os estilo-estigmas e alimentando-se dos grãos leitosos. Para promover o manejo dessas pragas com a mínima utilização de agrotóxicos, a tecnologia das plantas geneticamente modificadas tem sido objeto de estudos. Neste trabalho, os objetivos foram avaliar a infestação de lagartas e injúrias de S. frugiperda e determinar o comportamento de oviposição, intensidade de infestação, danos nos estilo-estigmas e espigas provocados por H. zea em condições de campo, em híbridos convencionais e transgênicos. Os híbridos foram semeados na safrinha de 2010 e na safra de 2010/2011, em delineamento de blocos ao acaso, com sete tratamentos (híbridos) e quatro repetições. Diferentes níveis de infestação ocorreram durante os experimentos nos híbridos Bt e não Bt. O híbrido 2B710HX foi o menos infestado com lagartas de S. frugiperda e o menos danificado, o que se conclui que a expressão da toxina Cry1F foi a mais efetiva na proteção da planta, independente da época de semeadura. Os híbridos que expressam a toxina Cry1Ab e Cry1F foram os mais efetivos no controle da H. zea em Jaboticabal, independente da época de semeadura. Em Pindorama, SP, a toxina Cry1F apresentaram bons resultados contra a infestação de lagartas
Abstract: The maize is a plant domesticated by humans world's oldest and your production becomes threatened before the attack of pests. Among the pest that attack maize stand out the fall armyworn Spodoptera frugiperda and the bollworm Helicoverpa zea. S. frugiperda attacks preferably the maize plants consuming much of the leaf area before the leaves develop. H. zea hurting the culture attacking style-stigma and destroying the mand. In order to promote the management of these pests with minimal use of pesticides, the technology of genetically modified plants has been the subject of many studies. In this paper, the objective was to evaluate the infestation and injuries of S. frugiperda and determine the oviposition behavior, intensity of infestation, damage to the style-stigma and in ear caused by H. zea in field conditions in conventional and transgenic maize hybrids. The hybrids were planted in the harvest in the summer of 2010 and in harvest 2010/2011, in a randomized blocks with seven treatments (hybrids) and four replications. Different levels of infestation of larvae occurred throughout the development of conventional and transgenic hybrids. The hybrid 2B710HX was the least infested with larvae of S. frugiperda and the least damaged, which concludes that the Cry1F toxin was the most effective in protecting the plant, regardless of time of sowing. The hybrids expressing the Cry11Ab and Cry1F toxin were most effective in controlling H. zea in Jaboticabal, SP, regardless of sowing time. In Pindorama, SP, toxin Cry1F showed good results against the infestation of caterpillars
Doutor
Mesquita, Josà Bruno Rego de. "INFLUENCE OF IRRIGATION, NITROGEN DOSES AND POTASSIUM APPLIED BY CONVENTIONAL AND METHOD FOR FERTIRRIGATION IN MAIZE". Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15845.
Pełny tekst źródłaIn the Northeastern Brazil, particularly in the Cearà state, irrigated agriculture contributes significantly to agricultural production: fruit, vegetable and grain crops. The Maize (corn) culture, traditional in the Region, has great socio-economic importance, being the most cultivated by small, medium and large farmers, contributing to the generation of employment and income, keeping workers from migrating. The experiment was conducted in the experimental area of the EstaÃÃo AgrometeorolÃgica (agrometeorological station) of the Universidade Federal do CearÃ. The soil of the region is sandy red yellow podzolic. The experiment was carried out with AG-1051 hybrid maize. Localized drip irrigation was used in the experiment. The said experiment was performed through 2011 and 2012. The total acreage in each year was 602 m2, divided into three parts for installing each of the three (sub) experiments. The first (sub) experiment consisted in applying several irrigation levels based on Penman-Monteith EvapoTranspiration parametrized by FAO, corresponding to treatments: Li30, or 30% PMETo; Li60, or 60% PMETo; Li90, or 90% PMETo; Li120, or 120% PMETo; Li150, or 150% PMETo and Li180, or 180% PMETo. The experimental design was that of randomized blocks, with six treatments and five blocks (replicates). The second experiment consisted of evaluating the effects of different N doses, conventionally applied and applied by fertigation. The treatments were divided into F0 and C0 = 0.0 kg ha-1 (control); F45 = 45 kg ha-1 (fert); C45 = 45 kg ha-1 (conv); F90 = 90 kg ha-1 (fert); C90 = 90 kg ha-1 (conv); F180 = 180 kg ha-1 (fert); C180 = 180 kg ha-1 (conv). The third experiment consisted of evaluating the effects of different doses of K, conventionally applied and applied by fertigation. The treatments were divided into F0 and C0 = 0.0 kg ha-1 (control); F15 = 15 kg ha-1 (fert); C15 = 15 kg ha-1 (conv); F30 = 30 kg ha-1 (fert); C30 = 30 kg ha-1 (conv); F60 = 60 kg ha-1 (fert); C60 = 60 kg ha-1 (conv). The experimental design in the second and third (sub) experiments was that of randomized blocks in a 2x4 factorial arrangement with eight treatments and four replicates. Irrigation levels showed significant effects on the following variables: Corn cob with and without husks, thousand grain weight and productivity in both years, all adjusting to the second degree polynomial model. The irrigation level that maximized the yield of corn (maize) was estimated to be 124.2% of PMETo, for the climatic conditions of 2012. Regarding the nitrogen dose and its form of application, it was observed that fertigation was superior to conventional fertilization, and the variables Corn cob with and without husks and productivity showed significant effects for the application form and Nitrogen dose. The dose of nitrogen fertilizer that maximized the Maize (or corn) productivity was estimated at 123.2 kg ha-1. However, relatively to the K dose and its form of application, it was observed that the conventional fertilization did not differ from fertigation, in the two years evaluated. However, the K doses were statistically different for following the variables: Corn cob with and without husks and productivity. Conventionally applied, the K dose which maximized the crop yield was 82.0 kg ha-1 for the cultivation conditions of 2011.
Na regiÃo Nordeste, particularmente no CearÃ, a agricultura irrigada contribui bastante com a produÃÃo agrÃcola: frutas, hortaliÃas, olerÃcolas e grÃos. A cultura do milho, muito tradicional na RegiÃo, apresenta grande importÃncia socioeconÃmica, sendo a mais cultivada por pequenos, mÃdios e grandes agricultores, contribuindo para a geraÃÃo de emprego e renda e para fixaÃÃo do homem no campo. O experimento foi conduzido na Ãrea experimental da EstaÃÃo AgrometeorolÃgica da Universidade Federal do CearÃ. O solo da regiÃo à um argissolo vermelho amarelo de textura areia franca. O experimento foi com o milho hÃbrido AG-1051. O sistema de irrigaÃÃo utilizado nos experimentos foi do tipo localizado por gotejamento. Os trabalhos foram conduzidos em dois anos agrÃcolas (2011 e 2012). A Ãrea total cultivada em cada ano foi de 602 m2, dividida em trÃs subÃreas, para instalaÃÃo de cada um dos trÃs experimentos. O primeiro experimento consistiu na aplicaÃÃo de lÃminas de irrigaÃÃo com base na ETo de Penman-Monteith (EToPM) parametrizada pela FAO, correspondendo aos tratamentos: Li30 â 30% EToPM; Li60 â 60% EToPM; Li90 â 90% EToPM; Li120 â 120% EToPM; Li150 â 150% EToPM e Li180 â 180% EToPM. O delineamento experimental utilizado foi em blocos ao acaso, composto de seis tratamentos e cinco blocos (repetiÃÃes). O segundo experimento consistiu em avaliar diferentes doses de N aplicadas de forma convencional e por fertirrigaÃÃo. Os tratamentos foram divididos em: F0 e C0 â 0,0 kg ha-1 (controle); F45 â 45 kg ha-1 (fert); C45 â 45 kg ha-1 (conv); F90 â 90 kg ha-1 (fert); C90 â 90 kg ha-1 (conv); F180 â 180 kg ha-1 (fert); C180 â 180 kg ha-1 (conv). O terceiro experimento consistiu em avaliar diferentes doses de K aplicadas de maneira convencional e por fertirrigaÃÃo. Os tratamentos foram divididos em: F0 e C0 â 0,0 kg ha-1 (controle); F15 â 15 kg ha-1 (fert); C15â 15 kg ha-1 (conv); F30 â 30 kg ha-1 (fert); C30 â 30 kg ha-1 (conv); F60 â 60 kg ha-1 (fert); C60 â 60 kg ha-1 (conv). O delineamento experimental utilizado no segundo e terceiro experimentos foi em blocos ao acaso, em arranjo fatorial 2x4 com oito tratamentos e quatro repetiÃÃes. As lÃminas de irrigaÃÃo apresentaram efeito significativo para as variÃveis: massa da espiga com e sem palha, massa de mil grÃos e produtividade nos dois anos agrÃcolas, ajustando-se ao modelo polinomial do segundo grau. A lÃmina de irrigaÃÃo que maximizou a produtividade do milho foi estimada em 124,2% da EToPM, para as condiÃÃes climÃticas do cultivo realizado em 2012. Em relaÃÃo à dose de N e sua forma de aplicaÃÃo, observou-se que a fertirrigaÃÃo foi superior à adubaÃÃo convencional, e que as variÃveis: massa da espiga com e sem palha e produtividade apresentaram efeitos significativos para a forma de aplicaÃÃo e dose de N. A dose do adubo nitrogenado que maximizou a produtividade do milho foi estimada em 123,2 kg ha-1. JÃ, para a dose de K e sua forma de aplicaÃÃo, observou-se que a adubaÃÃo convencional nÃo diferiu da fertirrigaÃÃo, nos dois anos avaliados. Entretanto, as doses de K foram estatisticamente diferentes para as variÃveis: massa da espiga com e sem palha e produtividade. Na forma convencional, a dose de potÃssio que maximizou a produtividade da cultura foi de 82,0 kg ha-1, para as condiÃÃes de cultivo em 2011.
Armour, Ian. "Intercropping corn (Zea mays L.) with forage legumes to suppress yellow nutsedge (Cyperus esculentus L.)". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59300.
Pełny tekst źródłaSaropulos, Athanassios S. "Chilling-induced physiological dysfunction in leaves of Zea mays L. and Capsicum annuum L. seedlings". Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283693.
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