Дисертації з теми "Breeding and selection"
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Holzbauer, Regina. "Economic values and responses to selection using selection indices in swine." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0003/MQ44183.pdf.
Повний текст джерелаBorrenpohl, Daniel. "Genomic selection can replace phenotypic selection in early generation wheat breeding." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562957699157873.
Повний текст джерелаBorg, Randy Charles. "Developing Breeding Objectives for Targhee Sheep." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9973.
Повний текст джерелаMaster of Science
Petropoulou, Smaragdi Panagiotis. "Temperature related factors as selection criteria in apple breeding." Thesis, Imperial College London, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261813.
Повний текст джерелаTodd, Darren Lindsay. "Implementation of genomic selection in UK beef and sheep breeding." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8766.
Повний текст джерелаMazhar, Kehkashan. "Molecular genetic markers for selection and genome mapping in cattle." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260797.
Повний текст джерелаFirat, Mehmet Ziya. "Bayesian methods in the selection of farm animals for breeding." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/14854.
Повний текст джерелаLehtonen, Emily. "Breeding Site Selection and Breeding Success in Red-throated Divers (Gavia stellata): Implications for Wind Power Development." Thesis, Uppsala universitet, Institutionen för ekologi och genetik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314976.
Повний текст джерелаBrassard, Jonathan Thomas. "Phenotypic selection in Impatiens pallida and Impatiens capensis." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61934.
Повний текст джерелаBrown, Timothy P. (Timothy Phillip). "Selection indices in retrospect for dairy cattle." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59266.
Повний текст джерелаDiaz-Martin, Clara. "Correlation of predicted breeding values across environments in the presence of selection for direct and maternal breeding values." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/39438.
Повний текст джерелаPh. D.
Allali, Mohamed. "The efficiency of selection in a Moroccan sugar cane breeding programme." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239460.
Повний текст джерелаRobinson, David Lowell 1955. "RECURRENT SELECTION FOR GERMINATION SALT TOLERANCE IN ALFALFA (SALINITY, FORAGES, BREEDING)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/277015.
Повний текст джерелаEscamilla, Sanchez Diana Marcela. "Improving Breeding Selection of Seed Quality Traits for Food-Grade Soybeans." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/81963.
Повний текст джерелаMaster of Science
Shadwick, Mark. "An investigation of the MLC beef bull index." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386691.
Повний текст джерелаAndersson, Erik W. "Gain and diversity in multi-generation breeding programs /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5629-0.pdf.
Повний текст джерелаAl-Doss, Abdullah 1963. "Selection of very nondormant alfalfa for increased winter and spring production." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277055.
Повний текст джерелаStanek, John R. "Breeding habitat selection by rosy-finches in the San Juan Mountains, Colorado." Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1939351891&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Повний текст джерелаKruger, Narelle Lee. "Simulating the impact of marker-assisted selection in a wheat breeding program /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18989.pdf.
Повний текст джерелаNeves, Haroldo Henrique de Rezende [UNESP]. "Strategies to improve the efficiency of genomic selection in animal breeding programs." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/102766.
Повний текст джерелаEsta tese compreende quatro diferentes estudos conduzidos a fim de avaliar estratégias alternativas para aumentar a eficiência de seleção genômica (GS) em programas de melhoramento animal. Um primeiro estudo foi desenvolvido com a finalidade de avaliar a performance preditiva de diferentes métodos estatísticos com base na informação de painéis de marcadores densamente distribuídos ao longo do genoma. Cinco diferentes características de uma população real de camundongos foram analisadas. Verificou-se que métodos com grandes diferenças conceituais apresentaram performance preditiva similar em algumas situações, também havendo variação na performance relativa dos métodos em função da característica analisada. O uso de diferentes variáveis resposta (pseudo-fenótipos) para estimação de efeitos de marcadores foi avaliado num segundo estudo, por meio da simulação de uma grande população de bovinos de corte, para a qual predições genômicas foram obtidas usando um procedimento de múltiplas etapas. Houve evidência de que provas desregredidas (dEBV) são mais apropriadas do que valores genéticos preditos (EBV) e médias ajustadas de desempenho da progênie (PYD), tanto para o treinamento de modelos quanto para a validação de predições genômicas. No terceiro estudo, procurou-se avaliar consequências em longo-prazo da aplicação de GS numa população de bovinos de corte sob seleção. Verificou-se grande benefício da aplicação de GS em cenários simulando seleção para características de qualidade de carne e reprodução de fêmeas. Houve evidência de que pode-se esperar maior benefício para GS, quando comparada à seleção por BLUP, no caso de características oligogênicas. Também foi possível inferir que em aplicações de GS, o uso de um critério de seleção em que se atribui maior peso a alelos favoráveis de menor frequência poderia proporcionar...
Improvements in production levels and product quality are needed in livestock systems to meet the growing world demand for animal-source foods. Besides this increasing demand, the productive sector must deal with constraints related to competition for land, greenhouse gas emissions and also due to hardening legislation in the fields of environment and animal welfare (FAO, 2011). In this context, animal breeding has played and will continue to play an important role to improve the efficiency of such production systems, especially in terms of competitiveness, safety, sustainability and biodiversity conservation (Harlizius et al., 2004). The main objective of animal breeding programs is to improve the performance of the next generations, through identification and reproduction of the animals with better genetic pool to efficiently produce in a specific environment (herein, superior animals). In the last decades, animal breeders succeeded in achieving this goal, mostly through the application of statistical tools grounded in quantitative genetics theory, what could be called as 'classical animal breeding'. In this case, the traditional prediction of the genetic merit of individuals (estimated breeding values, EBV) is obtained based on information of pedigree and phenotypes (own records and measures on relatives). With the advent of dense molecular marker panels, the implementation and design of breeding programs, especially in dairy cattle, had changed dramatically as a consequence of incorporating this new information to identify superior animals earlier and more precisely. Pioneer simulation studies drew attention of animal breeders to the possibility of making accurate predictions of the genetic merit of individuals by using genotypic information from dense marker panels, a process known as genomic selection (GS) (Nejati-Javaremi et al., 1997; Meuwissen et al., 2001). Other influential work ...
Ignatiuk, Jordan B. (Jordan Blake). "Breeding biology and habitat selection of American crows in Saskatchewan parkland habitat." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60454.
Повний текст джерелаOverall, density of nests at St. Denis averaged twice that found at Elstow and clutches were initiated earlier at St. Denis than at Elstow. Clutch size and hatching success did not differ between years or areas, but in 1987, nests at St. Denis produced nearly twice as many young as at Elstow.
Crows nested in willow, aspen, and other trees. Nest trees were larger than randomly-selected trees in both years and areas. At St. Denis, the area near active crow nests had, on average, more permanent wetlands, a greater proportion of pasture and wetland, and less area of cultivation than areas adjacent to random sites. At St. Denis, successful nests were closer to permanent water and had more permanent wetlands nearby than depredated nests, but discriminant function analysis could not correctly distinguish successful nests in either area. Selection of nest characteristics to evade predators does not appear to provide predictable advantages to breeding crows.
van, Heelsum Anna Maria. "Selection strategies in marker assisted introgression, with special reference to pig breeding." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/13156.
Повний текст джерелаPretorius, Susan Mathilda. "Evaluation of the selection and breeding of Friesian horses in Southern Africa." Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/26913.
Повний текст джерелаDissertation (MSc (Agric))--University of Pretoria, 2003.
Animal and Wildlife Sciences
unrestricted
Akpolat, Hacer. "Improvement of Tomato Breeding Selection Capabilities using Vibrational Spectroscopy and Prediction Algorithms." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574812034661898.
Повний текст джерелаFelts, James Vernon. "Dietary self-selection and feed restriction studies with growing and breeding turkeys." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07282008-135100/.
Повний текст джерелаPretorius, Susan Mathilda. "Evaluation of the selection and breeding of Friesian horses in Southern Africa." Pretoria : [s.n.], 2005. http://upetd.up.ac/thesis/available/etd-08012005-171825.
Повний текст джерелаNeves, Haroldo Henrique de Rezende. "Strategies to improve the efficiency of genomic selection in animal breeding programs /." Jaboticabal, 2013. http://hdl.handle.net/11449/102766.
Повний текст джерелаCoorientador: Roberto Carvalheiro
Banca: Fernando Sebastián Baldi Rey
Banca: Rúsbel Raúl Aspilcueta Borquis
Banca: Fernanda Brito
Banca: Fabyano Fonseca e Silva
Resumo: Esta tese compreende quatro diferentes estudos conduzidos a fim de avaliar estratégias alternativas para aumentar a eficiência de seleção genômica (GS) em programas de melhoramento animal. Um primeiro estudo foi desenvolvido com a finalidade de avaliar a performance preditiva de diferentes métodos estatísticos com base na informação de painéis de marcadores densamente distribuídos ao longo do genoma. Cinco diferentes características de uma população real de camundongos foram analisadas. Verificou-se que métodos com grandes diferenças conceituais apresentaram performance preditiva similar em algumas situações, também havendo variação na performance relativa dos métodos em função da característica analisada. O uso de diferentes variáveis resposta (pseudo-fenótipos) para estimação de efeitos de marcadores foi avaliado num segundo estudo, por meio da simulação de uma grande população de bovinos de corte, para a qual predições genômicas foram obtidas usando um procedimento de múltiplas etapas. Houve evidência de que provas desregredidas (dEBV) são mais apropriadas do que valores genéticos preditos (EBV) e médias ajustadas de desempenho da progênie (PYD), tanto para o treinamento de modelos quanto para a validação de predições genômicas. No terceiro estudo, procurou-se avaliar consequências em longo-prazo da aplicação de GS numa população de bovinos de corte sob seleção. Verificou-se grande benefício da aplicação de GS em cenários simulando seleção para características de qualidade de carne e reprodução de fêmeas. Houve evidência de que pode-se esperar maior benefício para GS, quando comparada à seleção por BLUP, no caso de características oligogênicas. Também foi possível inferir que em aplicações de GS, o uso de um critério de seleção em que se atribui maior peso a alelos favoráveis de menor frequência poderia proporcionar ...
Abstract: Improvements in production levels and product quality are needed in livestock systems to meet the growing world demand for animal-source foods. Besides this increasing demand, the productive sector must deal with constraints related to competition for land, greenhouse gas emissions and also due to hardening legislation in the fields of environment and animal welfare (FAO, 2011). In this context, animal breeding has played and will continue to play an important role to improve the efficiency of such production systems, especially in terms of competitiveness, safety, sustainability and biodiversity conservation (Harlizius et al., 2004). The main objective of animal breeding programs is to improve the performance of the next generations, through identification and reproduction of the animals with better genetic pool to efficiently produce in a specific environment (herein, superior animals). In the last decades, animal breeders succeeded in achieving this goal, mostly through the application of statistical tools grounded in quantitative genetics theory, what could be called as 'classical animal breeding'. In this case, the traditional prediction of the genetic merit of individuals (estimated breeding values, EBV) is obtained based on information of pedigree and phenotypes (own records and measures on relatives). With the advent of dense molecular marker panels, the implementation and design of breeding programs, especially in dairy cattle, had changed dramatically as a consequence of incorporating this new information to identify superior animals earlier and more precisely. Pioneer simulation studies drew attention of animal breeders to the possibility of making accurate predictions of the genetic merit of individuals by using genotypic information from dense marker panels, a process known as genomic selection (GS) (Nejati-Javaremi et al., 1997; Meuwissen et al., 2001). Other influential work ...
Doutor
Butler, Robert William. "Habitat selection and time of breeding in the Great Blue Heron, (Ardea herodias)." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30965.
Повний текст джерелаScience, Faculty of
Zoology, Department of
Graduate
Beattie, Aaron D. "Application of marker-assisted selection to breeding of common bean, Phaseolus vulgaris L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ33207.pdf.
Повний текст джерелаStella, Alessandra. "Strategies for applying marker assisted selection in nucleus breeding schemes in dairy cattle." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ56295.pdf.
Повний текст джерелаHocking, Daniel J. "Gray treefrog breeding site selection and offspring performance in response to forest management." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5103.
Повний текст джерелаThe 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 October 26, 2007) Includes bibliographical references.
Hewitson, Stacy. "Habitat selection by breeding American black ducks (Anas rubripes) in northeastern Nova Scotia." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22739.
Повний текст джерелаBlack duck pairs selected deciduous shrub ponds and sparsely vegetated ponds and avoided estuarine marsh and large lake habitat. Hens with broods preferred the deciduous shrub habitat while they avoided large lakes.
Black duck pairs appeared to use the distance to a brood-rearing pond as a cue in site selection. The closer a pond was to a suitable rearing pond the more likely it was occupied by a pair, regardless of food or cover resource availability. Black ducks, however, likely used site attributes such as the perimeter of the pond, the availability of aquatic invertebrates and the relative abundance of alder, willow and dead timber as cues in the selection brood-rearing habitat.
Black duck duckling survival, an estimate of recruitment, was the highest on preferred deciduous shrub ponds. Duckling survival was also higher on ponds with only one brood as opposed to ponds with several broods.
The most productive habitat for black ducks in the Antigonish study area were isolated, deciduous shrub ponds influenced by beaver activity. Black duck population numbers can be enhanced by managing local beaver populations.
Argüelles-Ticó, Araceli. "Sexual selection, breeding systems and melanin-based plumage colouration in plovers Charadrius spp." Thesis, University of Bath, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582832.
Повний текст джерелаSousa, Bridget Frances. "ECOLOGY OF MATING PATTERNS AND SEXUAL SELECTION IN DICKCISSELS BREEDING IN MANAGED PRAIRIE." UKnowledge, 2012. http://uknowledge.uky.edu/biology_etds/17.
Повний текст джерелаFranco, Aldina M. A. "Habitat selection and breeding ecology of lesser kestrels Falco naumanni : implications for conservation." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398500.
Повний текст джерелаBrown, Jack. "The efficiency of selection in the early generations of a potato breeding programme." Thesis, University of St Andrews, 1988. http://hdl.handle.net/10023/7107.
Повний текст джерелаShateryan, Djavad. "Evaluation of three cycles of recurrent phenotypic selection for forage yield in orchardgrass and timothy." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26140.
Повний текст джерелаThree cycles of RRPS were not effective in increasing forage dry matter yields. The lack of response may be due to a narrow genetic base in the source populations and/or the population size under selection may have been too small, resulting in inbreeding depression. Another explanation for the ineffective selection may be non-random pollination among selected plants. The selection for forage yield produced some minor changes in other characteristics. There was a tendency towards increased plant height and circumference in orchardgrass; however, for timothy, height and circumference were reduced by selection. Cycle 3 of Avon orchardgrass was one day later in maturity and there was also a tendency for later maturity for timothy.
Raj, Towfique. "Molecular signatures of natural and artificial selection in mammalian genomes." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609021.
Повний текст джерелаRönnegård, Lars. "Selection, maternal effects and inbreeding in reindeer husbandry." Uppsala : Dept. of Animal Breeding and Genetics, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a370.pdf.
Повний текст джерелаMoride, Yola. "The effect of selection for growth rate on growth hormone levels in the laboratory mouse /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65356.
Повний текст джерелаGreen, Ronald T. "Evaluation of optimum and near optimum pair selection methods for increasing predicted relative net income in Jersey cattle." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45650.
Повний текст джерелаTo evaluate the importance of non-linear relationships between Relative net income per day of productive life (RNI/DPL) and individual traits, 921,915 potential offspring were simulated from all possible matings of 20,487 Jersey cows and 45 active AI sires. Predicted milk yield, fat yield, and 13 linear type traits of potential progeny were used to predict RNI/DPL of all potential progeny.
Five methods of mate selection and pairing were evaluated for their effectiveness in choosing mates and the amount of computer time required to choose those pairings. Results of a linear programming (LP) method were used as a comparison for the other four more easily applied methods. Two of the other four methods were not significantly (P > .01) different from the LP method. Although the random pairing method was significantly different, similarity of results, for this method indicated non-linear relationships between RNI/DPL and individual trait scores are of minor importance. A11 four methods used considerable less computer time than the LP method.
Analysis of variance for predicted RNI/DPL (all possible offspring) indicated herd, dam within herd, sire, and inbreeding class to be significant (P < .01) variables in determining RNI/DPL. However the sire by dam within herd interaction did not significantly affect RNI/DPL, again indicating non-linear relationships between traits and RNI/DPL were not very important.
Regressing PDâ s, Clâ s, and their crossproducts for milk yield, fat yield, and 13 linear type traits showed the relative importance of crossproducts to be minimal in comparison to the linear ellects of parental genetic evaluations.
Master of Science
Pegard, Marie. "New models for implementation of genome-wide evaluation in black poplar breeding program." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2058/document.
Повний текст джерелаForest species are unique in many ways compared to other domesticated species. Forest trees have long juvenile phases, leading to long and costly selection cycles and requiring selection in several independent stages. Even if this method is operationally effective, it remains costly in terms of time and resources, resulting in a diluted intensity and accuracy of selection.In view of these constraints, trees are good candidates for the implementation of genomic evaluation. Genomic selection (SG) is based on the classification and selection of individuals from the information contained in their genome without using a phenotypic evaluation step and thus accelerating the selection process, in order to identify the situations, criteria and factors in which SG could be a feasible option for poplar. Our study showed that the benefits of genomic evaluation are context-dependent. Genomic evaluation is most effective in theless-advantageous situations, it also benefits from low to medium density genetic information following a high-quality imputation step. Genomic selection could be an interesting option at an early stage, when the accuracy of selection is generally low and genetic variability is abundant.Our work has also shown that it is important to evaluate performance with alternative criteria,such as those related to ranking, especially when these criteria fit the operational context of the breeding programme under study
Myszewski, Jennifer Helen. "A comparison of selection and breeding strategies for incorporating wood properties into a loblolly pine (Pinus taeda L.) elite population breeding program." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/75.
Повний текст джерелаPapazoglou, Fotini. "Aspects of habitat selection in the sedge warbler Acrocephalus schoenobaenus in Sussex." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360490.
Повний текст джерелаPaget, Mark Frederick. "Genetic evaluation models and strategies for potato variety selection." Thesis, University of Canterbury. Forestry, 2014. http://hdl.handle.net/10092/9953.
Повний текст джерелаBreault, Andre Mario. "Breeding distribution, habitat selection and factors affecting coloniality in eared grebes in British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28922.
Повний текст джерелаScience, Faculty of
Zoology, Department of
Graduate
Mrode, Raphael Aweyevu. "Genetic response to selection for rate and efficiency of lean gain in beef cattle." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/15445.
Повний текст джерелаNtladi, Solomon Magwadi. "Implementation of marker assisted breeding in triticale." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18035.
Повний текст джерелаENGLISH ABSTRACT: Research into markers for the detection of genetic diversity and cultivar identification has become an important component of the genetic improvement of crops. However, the incorporation of marker assisted selection (MAS) as a tool for the identification and characterization of breeding material has not been fully implemented in the breeding of spring triticale at Stellenbosch University’s Plant Breeding laboratory (SU-PBL). The present study served as a case study in order to achieve this. The first part of the study concerned the detection of genetic diversity in 101 newly sourced triticale cultivars, from a USDA germplasm bank, together with five local control cultivars, in order to identify possible crossing parents. Eight SSR markers, including five derived from rye and three from wheat, and five agronomic characteristics were used to assess diversity. In seedling screening the foreign cultivars showed resistance towards the stem rust isolate used, but were mostly susceptible to the leaf rust isolate. Out of the 8 SSR markers tested, 7 markers were polymorphic and revealed 140 alleles varying from 12 to 26 with an average of 17.5 alleles per locus. The observed polymorphic information content (PIC) value ranged from 0.39 to 0.88 with an average of 0.70, indicative of the good discriminatory ability of the SSR markers. The data revealed that the South African cultivars were genetically closely related to cultivars from the USA and Canada. The second part of the study focused on the introgression of a blue aleurone layer gene (Ba), carried by a wheat cultivar, ‘Cltr1202STR’, and purple pericarp genes (Pp1; Pp3) also carried by a wheat cultivar, ‘Amethyst’, into a triticale background. Unfortunately the introgression of the purple pericarp genes failed. Two lines containing the blue aleurone layer, 11T023 and 11T028, were however successfully created. Molecular typing of these lines with SSR markers were able to show that BC4F1 line 11T023 (Ba) B was genetically similar to the recurrent parent ‘Agbeacon’; and that the BC4F1 11T028 line (Ba) A was closest to the ‘US2007’ recurrent parent. The study illustrated that MAS was a reliable tool for detecting genetic diversity in newly sourced germplasm, and assisted in making a backcross breeding effort more effective. The data generated from MAS could therefore clearly assist in making the SU-PBL breeding program more effective by moving, better informed, decision making toward data based partly on the genotype, thereby minimizing the risks associated with purely phenotypic based decisions.
AFRIKAANSE OPSOMMING: Navorsing rondom die gebruik van merkers vir die bepaling van genetiese-diversiteit en kultivar identifikasie is ‘n toenemend belangriker komponent vir die genetiese verbetering van gewasse. Die inkorporering van merker-bemiddelde-seleksie (MBS) as gereedskap vir die identifikasie en karaktarisering van telingsmateriaal is nog nie ten volle geïmplimenteer in die lente korogtelingsprogram van die Stellenbosch Universiteit Planteteeltlaboratorium (SU-PTL). Die studie het gedien as gevallestudie ten einde dit te bereik. Die eerste gedeelte van die studie het gehandel oor die tipering van die genetiese diversiteit van ‘n 101 kultivars verkry vanaf ‘n USDA kiemplasmabank saam met 5 plaaslike kontroles. Dit was gedien ten einde moontlike kruisings-ouers te kon identifiseer. Agt SSR merkers, insluitend vyf afkomstig van rog en drie vanaf koring, asook vyf agronomiese kenmerke is aangewend om die materiaal se diversiteit te tipeer. Saailingtoetsing is ook gedoen en het aangetoon dat die meeste kultivars weerstandig was vir die stamroes-isolaat, maar nie die blaarroes-isolaat nie. Van die agt SSR merkers getoets het sewe getoon om polimorfies te wees en het ‘n 140 allele gegee wat gewissel het vanaf 12 tot 26 per lokus met ‘n gemiddeld van 17.5. Die waargenome polimorfiese inligtings inhoud (PII) waarde het gewissel vanaf 0.39 tot 0.88 met ‘n gemiddeld van 0.70. Die merkers kon dus suksesvol diskrimineer. Die data het aangetoon dat die Suid-Afrikaanse kultivars genetiese die naaste verwant was aan die kultivars afkomstig vanaf die VSA en Kanada. Die tweede gedeelte van die studie het gefokus op die introgressie van ‘n blou aleuron-laag geen (Ba), afkomstig vanaf die koringkultivar ‘Cltr1202STR’, en twee pers-perikarp gene (Pp1; Pp3), afkomstig vanaf die koringkultivar ‘Amethyst’, na ‘n korog agtergrond. Ongelukkig het die oordrag van die pers-perikarp gene gefaal. Twee lyne wat die blou aleuron- laag bevat, 11T023 en 11T028, is egter suksesvol geskep. Tipering van die lyne met die SSR merkers het aangetoon dat die BC4F1 lyn 11T023 (Ba) B genetiese baie na aan die herhalende ouers ‘Agbeacon’ is en dat die BC4F1 11T028 lyn (Ba) A nader is aan die herhalende ouer ‘US2007’. Die studie het dus geïllustreer dat MBS gebruik kan word as ‘n betroubare manier om genetiese diversiteit te bepaal en by te dra tot die sukses van ‘n terugkruisingsprogram. Die data wat dus voortspruit uit MBS kan dus help om die SU-PTL se telingsprogram te assisteer in die besluitnemingsproses tydens teling deur beter genotipe gebaseerde besluite te neem wat die riskio van fenotipe gebaseerde besluite kan help verminder.
Roux, Evette. "Near infrared (NIR) spectroscopy for selection of malting barley in South African breeding programmes." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6871.
Повний текст джерелаHuang, Mao. "Accuracy of genomic selection in a soft winter wheat (Triticum aestivum L.) breeding program." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1468841458.
Повний текст джерела