GrainGenes Reference Report: PNA-100-2489
Reference
PNA-100-2489
Title
Domestication quantitative trait loci in Triticum dicoccoides, the progenitor of wheat
Journal
Proceedings of the National Academy of Sciences, USA
Year
2003
Volume
100
Pages
2489-2494
Author
Peng JH
[ Show all 7 ]
Abstract
Wild emmer wheat, Triticum dicoccoides, is the progenitor of modern tetraploid and hexaploid cultivated wheats. Our objective was to map domestication-related quantitative trait loci (QTL) in T. dicoccoides. The studied traits include brittle rachis, heading date, plant height, grain size, yield, and yield components. Our mapping population was derived from a cross between T. dicoccoides and Triticum durum. Approximately 70 domestication QTL effects were detected, nonrandomly distributed among and along chromosomes. Seven domestication syndrome factors were proposed, each affecting 5-11 traits. We showed: (i) clustering and strong effects of some QTLs; (ii) remarkable genomic association of strong domestication-related QTLs with gene-rich regions; and (iii) unexpected predominance of QTL effects in the A genome. The A genome of wheat may have played a more important role than the B genome during domestication evolution. The cryptic beneficial alleles at specific QTLs derived from T. dicoccoides may contribute to wheat and cereal improvement.
External Databases
Pubmed: 12604784
QTL
Keyword
allele
[ Show all 36 ]
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GrainGenes Reference Report: PNA-100-2489
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||