Journal ArticleDOI
Variation of molecular markers among geographically diverse accessions of Triticum tauschii
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TLDR
To study patterns of variability at a large number of loci, restriction fragment length polymorphism genotypes at 25 loci in a germ-plasm collection of 102 T. tauschii accessions were determined and Hedrick's probability of genotypic identity, botanical varieties T. typica and T. anathera were very similar to each other.Abstract:
Triticum tauschii (Coss.) Schmal. (genome DD), a diploid progenitor of hexaploid wheat (Triticum aestivum L.; AABBDD), grows across large areas of southwest Asia and contains more genetic variability for disease and insect resistance, isozymes, and seed storage proteins than the D genome of T. aestivum. To study patterns of variability at a large number of loci, we determined restriction fragment length polymorphism genotypes at 25 loci in a germ-plasm collection of 102 T. tauschii accessions. All accessions were homozygous at all loci, so "alleles" and "genotypes" were equivalent. Twenty loci were polymorphic, with two to six genotypes per locus and polymorphic indexes ranging from 0.06 to 0.74. Linkage disequilibrium was widespread. On the basis of Hedrick's probability of genotypic identity, botanical varieties T. t. ssp. eusquarrosa var. typica and T. t. ssp. eusquarrosa var. anathera were very similar to each other, as were T. t. ssp. strangulata and T. t. ssp. eusquarrosa var. meyeri, with a large g...read more
Citations
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Journal ArticleDOI
Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum/Aegilops complex and the evolutionary history of polyploid wheat
Shaoxing Huang,Anchalee Sirikhachornkit,Xiujuan Su,Justin D. Faris,Bikram S. Gill,Robert Haselkorn,Piotr Gornicki +6 more
TL;DR: The data suggest that the Acc-1 and Pgk-1 loci have different histories in different lineages, indicating genome mosaicity and significant intraspecific differentiation.
Journal ArticleDOI
The structure of the Aegilops tauschii genepool and the evolution of hexaploid wheat
TL;DR: Polymorphism in the lengths of restriction fragments at 53 single-copy loci, the rRNA locus Nor3, and the high-molecular-weight glutenin locus Glu1 was investigated in the D genome of hexaploid Triticum aestivum and that of Aegilops tauschii, and all appear to share a single D-genome genepool.
Journal ArticleDOI
Wheat genetic diversity trends during domestication and breeding
Jochen C. Reif,P. Zhang,S. Dreisigacker,Marilyn L. Warburton,M. Van Ginkel,David Hoisington,Martin O. Bohn,Albrecht E. Melchinger +7 more
TL;DR: The results indicate that breeders averted the narrowing of the wheat germplasm base and subsequently increased the genetic diversity through the introgression of novel materials.
Book ChapterDOI
DNA Markers and Plant Breeding Programs
TL;DR: This chapter attempts to survey the status of selected applications of DNA fingerprinting for activities of common interest to plant breeding programs and, ultimately, crop improvement.
Journal ArticleDOI
A genetic linkage map of Triticum tauschii (DD) and its relationship to the D genome of bread wheat (AABBDD)
TL;DR: One hundred and seventy-eight loci have been mapped in Triticum tauschii (Coss.), and a hypervariable sequence was identified, which may have potential use in varietal fingerprinting.
References
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Book
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TL;DR: Molecular Cloning has served as the foundation of technical expertise in labs worldwide for 30 years as mentioned in this paper and has been so popular, or so influential, that no other manual has been more widely used and influential.
Journal ArticleDOI
Some distance properties of latent root and vector methods used in multivariate analysis
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Journal ArticleDOI
Sampling variances of heterozygosity and genetic distance
Masatoshi Nei,A. K. Roychoudhury +1 more
TL;DR: The utility of the inter-locus variance of heterozygosity for studying the mechanism of maintenance of genetic variability in populations is indicated and mathematical formulae for the sampling variances are developed.
Journal ArticleDOI
The origin of triticum spelta and its free-threshing hexaploid relatives
E. S. Mcfadden,E. R. Sears +1 more
Journal ArticleDOI
Inferences about linkage disequilibrium.
TL;DR: General use of Burrows' composite measure of linkage disequilibrium, whether or not random union of gametes is an appropriate assumption, is recommended and attention is given to small samples, where the non-normality of gene frequencies will have greatest effect on methods of inference based on normal theory.
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