title: Domestication quantitative trait loci in Triticum dicoccoides, the progenitor of wheat.
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.
authors.affiliation: Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905, Israel.
authors.forename: Junhua
authors.initials: J
authors.lastname: Peng
authors.forename: Yefim
authors.initials: Y
authors.lastname: Ronin
authors.forename: Tzion
authors.initials: T
authors.lastname: Fahima
authors.forename: Marion S
authors.initials: MS
authors.lastname: Röder
authors.forename: Youchun
authors.initials: Y
authors.lastname: Li
authors.forename: Eviatar
authors.initials: E
authors.lastname: Nevo
authors.forename: Abraham
authors.initials: A
authors.lastname: Korol
mesh_terms: D000483:Alleles; D002874:Chromosome Mapping; D002875:Chromosomes; D019143:Evolution, Molecular; D008040:Genetic Linkage; D005838:Genotype; D008957:Models, Genetic; D010641:Phenotype; D040641:Quantitative Trait Loci; D013997:Time Factors; D014908:Triticum / Q000145:classification* / Q000235:genetics*