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Teses / dissertações sobre o tema "Wheat Genetics"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 20 de fevereiro de 2023

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1

Kapfuchira, Tawanda Alpha. "Genetics of biofortified wheat." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/15461.

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Biofortified wheat cultivars can be developed by reducing the levels of bioavailability inhibitors (such as phytate) and increasing the levels of bioavailability enhancers (such as fructans) in the grain. A double haploid (DH) population derived from a cross of MICH95.3.1.9 (a high grain phytate and high grain fructan genotype) and IDO637 (a low grain phytate and average grain fructan genotype) was evaluated for biofortification, agronomic and quality traits. Grain phytate concentration varied three-fold and grain fructan concentration varied two-fold. Significant differences were observed bet

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2

Sharma, Sapna. "Genetics of Wheat Domestication and Septoria Nodorum Blotch Susceptibility in Wheat." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/29767.

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T. aestivum ssp. spelta Iranian type has long been thought to potentially be the direct non-free threshing hexaploid progenitor. I evaluated a RIL population derived from a cross between CS and Iranian spelta accession P503 to identify loci suppressing free-threshabilty in P503. Identification of QTL associated with threshability in region known to harbor the Tg2A gene, and an inactive tg2D allele supported the hypothesis of Iranian spelta being derived from a more recent hybridization between free-threshing hexaploid and emmer wheat. Parastagonospora nodorum is an important fungal pathogen an

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3

Zainuddin. "Genetic transformation of wheat (Triticum aestivum L.)." Title page, Contents and Abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09APSP/09apspz21.pdf.

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Bibliography: leaves 127-151. The successful application of genetic engineering in wheat is dependent on the availability of suitable tissue culture and transformation methods. The primary object of this project was the development of these technologies using elite Australian wheat varieties.

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4

Singh, Nagendra Kumar. "The structure and genetic control of endosperm proteins in wheat and rye." Title page, contents and abstract only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phs6174.pdf.

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5

Horn, Marizanne. "Transfer of genetic resistance to the Russian wheat aphid from rye to wheat." Thesis, Stellenbosch : Stellenbosch University, 1997. http://hdl.handle.net/10019.1/55770.

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Thesis (MSc.) -- Stellenbosch University, 1997.<br>ENGLISH ABSTRACT: An octoploid triticale was derived from the F1 of a Russian wheat aphid resistant rye, 'Turkey 77', and 'Chinese Spring' wheat. The alloploid was crossed (a) to common wheat, and (b) to the 'Imperial' rye to 'Chinese Spring' disomic addition lines. F2 progeny from these crosses were tested for Russian wheat aphid resistance and C-banded. Resistance was found to be associated with chromosome arm 1RS of the 'Turkey 77' rye genome. This initial work was done by MARAIS (1991) who made a RWA resistant, monotelosomic 1RS (

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6

Zwart, Rebecca Susan. "Genetics of disease resistance in synthetic hexaploid wheat /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17369.pdf.

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7

Wessels, Willem Gerhardus. "Mapping genes for stem rust and Russian wheat aphid resistance in bread wheat (Triticum aestivum)." Thesis, Stellenbosch : Stellenbosch University, 1997. http://hdl.handle.net/10019.1/55580.

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Thesis ( MScAgric) -- Stellenbosch University, 1997.<br>ENGLISH ABSTRACT: Stem rust is considered the most damaging of the wheat rusts causing yield losses of more than 50% in epidemic years. Similarly, Russian wheat aphids (RWA) can be regarded as one ofthe most devastating insect pests of wheat. Yield losses due to R W A primarily result from a reduction in plant resources (sucking plant sap). Secondary losses are incurred by viruses transmitted during feeding. Mapping disease and insect resistance genes that are effective against prevailing pathotypes and biotypes of South Africa will

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8

Khan, Imtiaz Ahmed. "Utilisation of molecular markers in the selection and characterisation of wheat-alien recombiant chromosomes." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phk451.pdf.

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Bibliography: leaves 137-163. his is a comprehensive study of induced homoeologous recombination along most of the complete genetic length of two homoeologous chromosomes in the Triticeae (7A of common wheat and 7Ai of Agropyron intermedium), using co-dominant DNA markers. Chromosome 7Ai was chosen as a model alien chromosome because is has been reported to carry agronomically important genes conferring resistance to stem rust and barley yellow dwarf virus on its short and long arms, respectively.

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9

Harris, Nigel. "A transposable element of wheat." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330215.

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10

Groenewald, Johannes Zacharias. "Tagging and mapping of prominent structural genes on chromosome arm 7DL of common wheat." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52474.

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Thesis (PhD (Agric)) -- Stellenbosch University, 2001.<br>ENGLISH ABSTRACT: Chromosome arm 7DL of common wheat carries genes for agronomically important traits such as leaf rust, stem rust, Russian wheat aphid and eye spot resistance. Some of these genes occur on introgressed foreign chromatin, which restricts their utility in breeding. The 7DL genetic maps are poorly resolved, which seriously hampers attempts to manipulate the genes and introgressed regions in breeding. This dissertation represents an attempt to improve our knowledge of the relative map positions of three resistance gen

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11

Kaehne, Ian D. "Improving wheat by composite crosses based on `cornerstone' nuclear male sterility / Ian D. Kaehne." Adelaide, 1986. http://hdl.handle.net/2440/18530.

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1 v.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Agronomy, Waite Agricultural Institute, 1986

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12

Campbell, Jackie Bridget. "Increasing wheat hardness locus functionality by increasing puroindoline copy number and introduction of novel alleles." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/campbell/CampbellJ0507.pdf.

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13

Jamjod, Sansanee. "Genetics of boron tolerance in durum wheat." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phj324.pdf.

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Bibliography: leaves 234-256. Genetic studies of tolerance of durum wheat (Triticum turgidum L. var durum) to high concentrations of boron (B) were undertaken to identify genetic variation in response to B, the mode of gene action, number of genes and chromosomal locations of genes controlling tolerance. Results demonstrated that tolerance to B is under simple genetic control as observed in bread wheat. High levels of tolerance can be transferred into sensitive commercial varieties via backcrossing and selection can be performed during seedling growth at early generations.

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14

Honing, Jennifer. "Evaluation and implementation of DNA-based diagnostic methodology to distinguish wheat genotypes." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/638.

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15

Mantovani, Eder Eduardo. "Wheat Traits Variations, Associations, and Potential Improvement from Crosses of Elite X Non-Adapted Germplasm." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29911.

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Wheat improvement most often has been accompanied by a narrowing germplasm base, as newer cultivars have been derived from intercrosses between elite germplasm. However, there is a concern that narrow germplasm may restrict breeding improvement for important traits such as resistances to new biotic and abiotic stresses. In addition to germplasm base, the wheat kernel is a major component of wheat grain yield and an important factor for milling characteristics. Focusing on wheat kernel characteristics might be a key element to improve wheat genotypes for agronomic and quality traits. With the i

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16

Turnbull, Kym-Marie. "Genomic and developmental analyses of grain hardness in wheat / Kym-Marie Turnbull." Thesis, The University of Sydney, 2001. https://hdl.handle.net/2123/27751.

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17

Liu, Chao-yin. "Variation and genetic control of prolamins in tetraploid wheats and their association with quality in durum wheat." Title page, contents and summary only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phl783.pdf.

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18

Bekker, Tamrin Annelie. "Molekulere karakterisering van 'n Aegilops speltoides verhaalde translokasie en verkorte vorms." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1854.

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Thesis (MSc (Genetics))--University of Stellenbosch, 2009.<br>Gene transfer from wild gras species to wheat is complicated by the simultaneous integration of large amounts of alien chromatin. The alien chromatin containing the target gene is inherited as a linkage block and the phenomenon is known as linkage drag. The degree of linkage drag depends on whether, and how readily, recombination occurs between the foreign and wheat chromatin. The S13 translocation line was developed by the department of Genetics, US. A cross was made between Chinese Spring and a leaf rust resistant Aegilops speltoi

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19

Thomson, Brent Robert. "Genetic Diversity in Wheat: Analysis using Diversity Arrays Technology (DArT) in bread and durum wheats." Thesis, The University of Sydney, 2011. http://hdl.handle.net/2123/8087.

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With increasing demands on the quality and quantity of food required now and in the future, improvements to current agriculture practices are required. Increased food production requires utilisation of more agricultural land, pushing crops into non- traditional areas. The need for advances in agricultural technologies are not only required for current crop varieties, but for new varieties with increased tolerance to environmental stresses. Technological improvement means better crop yields and reduced land, water, fertilizer and pesticide use. Diversity Arrays Technology (DArT) was used to stu

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20

Turner, Matthew A. "DNA based approaches to characterise the chromosomal region containing the grain hardness (Ha) locus in wheat (Triticum aestivum L.)." Thesis, The University of Sydney, 1999. https://hdl.handle.net/2123/27692.

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Grain hardness is an important quality and end use determinant of wheat grain. The precise factor controlling grain hardness is not known but it is thought to be controlled at the starch granules-protein matrix interface in the endosperm tissue. The work described in this thesis consists of three broad approaches. The first approach involves isolation of candidate hardness regulating gene sequences from Triticum tauschii, a soft grained diploid relative of wheat. Sequences of the candidate genes and surrounding areas were obtained. A D genome specific GSP-1 sequence was identified in these s

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21

Ramburan, Viresh Premraj. "Genetic mapping of adult plant stripe rust resistance in the wheat cultivar Kariega." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53438.

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Thesis (PhD (Agric)) -- Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Stripe (yellow) rust of wheat, caused by Puccinia striiformis f.sp. tritici, was first detected as a single introduction into South Africa in 1996. Two additional pathotypes have since been identified. Control of the disease may be achieved by use of genetic adult plant resistance (APR) as is present in the local cultivar 'Kariega'. The aim of this project was to understand the genetic basis of the APR in 'Kariega' to facilitate breeding of new varieties with genetic resistance to stripe rust. A partial linkage

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22

Badenhorst, Pieter Engelbertus. "Poging om die Aegilops sharonensis-verhaalde Lr56/Yr38 koringtranslokasie te verkort." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/3083.

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23

Jones, M. C. "Replication of DNA by isolated wheat chloroplasts." Thesis, University of Hertfordshire, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356358.

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24

Koebner, Robert Max David. "Controlled introgression of alien chromatin into wheat /." Title page, table of contents and abstract only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phk77.pdf.

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25

Bradley, Bernadette. "The granule-bound starch synthase genes of wheat." Thesis, Bradley, Bernadette (2003) The granule-bound starch synthase genes of wheat. PhD thesis, Murdoch University, 2003. https://researchrepository.murdoch.edu.au/id/eprint/442/.

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Wheat (Triticum aestivum) is the world's most widely grown and economically important crop. It is both a staple food for humans and a raw material for many industrial processes. World trade in wheat is important for economic stability and an ability to grow wheat is a valuable national resource. Wheat is Australia's major crop with an annual production of about 23 million tonnes. One-quarter of this is used domestically and meets all of Australia's requirements; the remaining three-quarters is exported. Therefore, Australia's wheat industry provides both the national staple food source and

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26

Bradley, Bernadette. "The granule-bound starch synthase genes of wheat." Murdoch University, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040706.142601.

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Wheat (Triticum aestivum) is the worlds most widely grown and economically important crop. It is both a staple food for humans and a raw material for many industrial processes. World trade in wheat is important for economic stability and an ability to grow wheat is a valuable national resource. Wheat is Australias major crop with an annual production of about 23 million tonnes. One-quarter of this is used domestically and meets all of Australias requirements; the remaining three-quarters is exported. Therefore, Australias wheat industry provides both the national staple food source and th

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27

Uddin, Md Nizam. "Effects of genetic variation in glaucousness, number of tillers and plant height on response to water stress in wheat." Thesis, The University of Sydney, 1986. https://hdl.handle.net/2123/28704.

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Studies were conducted to evaluate the effect of glaucousness, number of tillers and plant height on response to water stress using near-isogenic wheat lines under two water regimes. The effect of glaucousness and number of tillers was studied under both field and glasshouse conditions while that of plant height was studied only under field conditions. In addition 28 wheat cultivars were evaluated for epicuticular wax content and its relationship with spectral reflectance. Highly significant differences (1.51 to 2.8 mg/dm2) were found in the amount of epicuticular wax (Ew) among the

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28

Riches, Eleanor Ruth. "The genetics and function of alkylresorcinols in wheat." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251391.

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29

Schultz, Thia. "Elucidating functional interactions between the Russian wheat aphid (D. noxia Kurjumov) and bread wheat (Triticum aestivum L.)." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95802.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The Russian wheat aphid (Diuraphis noxia, Kurdj., Hemipetra, Aphididae, RWA) is an important pest of wheat, causing large-scale damage and yield losses. Various studies have been done at a transcriptomics level, including complementary DNA-amplified fragment length polymorphisms (cDNA-AFLPs), suppressive subtractive hybridization (SSH) and micro-array, which have identified genes putatively involved in RWA resistance. Even though these candidate genes have been identified, their role in host defence still needs to be verified us

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30

Heyns, I. C. "Mapping of chromosome arm 7DL of Triticum aestivum L." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1584.

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Thesis (MSc (Genetics))--University of Stellenbosch, 2005.<br>The Russian wheat aphid, Diuraphis noxia (Mordvilko), is a serious insect pest of wheat and barley. It affects the quality and yield of grain by sucking plant sap from the newest growth whilst toxic substances are injected that destroy plant tissue. The Russian wheat aphid also acts as a vector of plant viruses. The cultivation of aphid resistant cultivars is the preferred control strategy and nine resistance genes, designated Dn1 to Dn9, have been identified. Another undesignated gene, Dnx, was found in the wheat accession PI2

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31

Fisher, Nadia Mitilda. "Gene silencing in bread wheat (Triticum aestivum L.) following a biolistics approach." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86591.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Global food security is hampered by a variety of insects/pest and plant diseases. In wheat, the Russian wheat aphid (RWA) is a significant pest problem in many areas of the world. Wheat has developed defensive mechanisms against the RWA over time which are activated upon feeding. One such mechanism is the hypersensitive response (HR) which is effective against phloem-feeding insects i.e. D. noxia (Diuraphis noxia, Kurdjumov, RWA). In this study, two genes associated with the hypersensitive response i.e. ascorbate peroxidase (APX

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32

Willey, N. J. "Rust Resistance in Wheat-Diversity and Genetic Studies." Thesis, The University of Sydney, 2011. https://hdl.handle.net/2123/29227.

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This study covered three aspects, namely; assessment of genetic diversity for rust resistance genes among released cultivars, inheritance of adult plant resistance (APR) in two North American wheat cultivars and genetic association between the stern rust resistance gene Sr3 9 and the stripe rust resistance gene YrSp. Queensland and northern New South Wales cultivars carried more diverse gene combinations in comparison to rest of the nation. Genetic diversity for all three rust diseases is a concern in Victoria and South Australia. There is need to release cultivars carrying combinatio

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33

Bierman, Anandi. "Mapping and survey sequencing of Dn resistance genes in Triticum aestivum L." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96912.

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Thesis (PhD)--Stellenbosch University, 2015<br>ENGLISH ABSTRACT : Diuraphis noxia Kurdjumov (Russian Wheat Aphid; RWA) is a pest of wheat and barley that has spread from its home range in the fertile crescent to most wheat producing countries except Australia. Since its first introduction to South Africa and the USA in the late 20th century, breeding programs for wheat phenotypes resistant to the aphid were put in place. Conventional breeding practices rely on phenotypic screening to verify traits carried by offspring and genetic tools such as marker assisted selection (MAS) have greatly aide

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34

Green, Andrew Justin. "Yield Improvement in Eastern Soft Red Winter Wheat from 1919 to 2009." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/36086.

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Periodic evaluation of improvements in yield and disease resistance is necessary to assess breeding progress over time, and the elucidation of underlying traits responsible for yield gains can help direct future breeding. Objectives of this study were: 1) to determine the rate and magnitude of yield progress in eastern soft red winter (SRW) wheat (Triticum aestivum, L.) cultivars released from 1950 to 2009 relative to a historical cultivar Red May (1919) and; 2) to determine effects of leaf rust (Puccinia triticina f. sp. tritici) and powdery mildew [Blumeria graminis (DC.) E.O. Speer f. sp.

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35

Vaughan, Tristan John. "Isolation and analysis of genes encoding wheat ribosomal proteins." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328181.

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36

Miller, T. E. "A study of chromosome pairing in wheat." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267558.

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37

De, Groot Stephan. "Initiation of a pre-breeding programme for enhancing genetic resistance against wheat rust." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71721.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Plant diseases are among the major causes of food insecurity. In South Africa the wheat fungal diseases including stem rust caused by Puccinia graminis f. sp. tritici, leaf rust caused by P. triticina and stripe rust caused by P. striiformis f. sp. tritici are the most important. Genetic resistance is a viable way of protecting wheat crops against the wheat rusts, especially cultivars carrying multiple genes that confer durable resistance. In order to breed for multi-gene resistance an effective breeding strategy that allow

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38

Zhang, Hui. "Triticeae genome relationships and wheat flowering time genes." Thesis, Open University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390896.

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39

Eksteen, Aletta. "Ontwikkeling van molekulere merkers vir wilde-spesie-verhaalde weerstandsgeenkomplekse van gewone koring." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2087.

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Thesis (MSc (Genetics))--University of Stellenbosch, 2009.<br>Worldwide, the rust diseases cause significant annual wheat yield losses (Wallwork 1992; Chrispeels & Sadava 1994). The utilization of host plant resistance to reduce such losses is of great importance particularly because biological control avoids the negative environmental impact of agricultural chemicals (Dedryver et al. 1996). The wild relatives of wheat are a ready source of genes for resistance to disease and insect pests. A large degree of gene synteny still exists among wheat and its wild relatives (Newbury & Paterson 2003).

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Arraiano, Lia Susana. "Genetics of resistance of wheat to septoria tritici blotch." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390648.

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The research described in this týesis was focused on achieving a better understanding of the genetics of resistance of wheat to septoria tritici blotch (Mycosphaerella graminicola). Firstly, a detached leaf technique that could be a useful complement to field trials and an alternative to whole seedling assays in assessing cultivar resistance and investigating the genetics of the host-pathogen interaction was developed. Sets of inter-varietal substitution lines, developed at the John Innes Centre, involving known and possible sources of resistance to septoria tritici blotch, were tested with se

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41

Wu, Ming Jie. "Identification and characterisation of polymorphic proteins in wheat grain: a proteomic and immunological approach." Thesis, The University of Sydney, 2007. https://hdl.handle.net/2123/28092.

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The development of wheat cultivars with unique quality traits is of major importance to the Australian wheat grower. Varietal diversity and flour quality of wheat are determined by genes and their products - proteins. Therefore, characterisation of the grain proteins will lead to discovery of potential protein markers for varietal identification and desirable quality attributes such as hardness, dough strength and extensibility. In order to screen the identified protein markers among thousands of breeder’s lines, specific high throughput detection methods are needed. In this study, a proteomi

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42

Hofer, Julie M. I. "Regulation of gene expression and replication in wheat dwarf virus." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334331.

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43

Gupta, Ram Bilas. "Low-Molecular-Weight subunits of glutelin in wheat and related species : their characterization, genetics and relation to bread-making quality." Title page, contents and summary only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phg977.pdf.

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44

Malik, Tanwir Ahmad. "Genetics and breeding for drought resistance in wheat : physio-molecular approaches." Thesis, Bangor University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282261.

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45

Sardana, Ravinder Kumar. "Structure and control of expression of ribosomal RNA genes in wheat." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305819.

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46

Jackson, Stephen Derek. "Proteins that bind to the promoter region of wheat rRNA genes." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334105.

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47

De, Jager Laura-Ellen. "Characterization of the mitochondrial genomes of Diuraphis noxia biotypes." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96007.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Diuraphis noxia (Kurdjumov, Hemiptera, Aphididae) commonly known as the Russian wheat aphid (RWA), is a small phloem-feeding pest of wheat (Triticum aestivum L). Virulent D. noxia biotypes that are able to feed on previously resistant wheat cultivars continue to develop and therefor the identification of factors contributing to virulence is vital. Since energy metabolism plays a key role in the survival of organisms, genes and processes involved in the production and regulation of energy may be key contributors to virulence: suc

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Brooks, Brenton James. "Breeding durum wheat for South Australia /." Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phb8731.pdf.

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Regina, Ahmed. "Genetic variability of starch in Triticum species." Phd thesis, Faculty of Agriculture, 2000. http://hdl.handle.net/2123/6001.

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