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GrainGenes Reference Report: PNA-100-2489

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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	QTL1769_2A-Peng_et_al._2003 [ Show all 37 ]
Keyword	[ Hide all but 1 of 36 ] allele b genome dicoccoides domestication durum emmer wheat evolution gene-rich regions genome genomic grain protein heading heading date hexaploid improvement linkage maps locus map mapping physical maps plant height population quantitative quantitative trait loci recombination rflp analysis rust resistance tetraploid trait loci triticum triticum dicoccoides triticum durum wild emmer wild emmer wheat yield yield components

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