Characterization of wild emmer wheat Triticum dicoccoides germplasm for vernalization alleles

摘要

The flowering in winter and wild wheats is induced by extended exposure to cold temperatures, a process called vernalization while spring wheats do not have any such requirement. In the present study, we analyzed 45 accessions of wild emmer wheat T dicoccoides for the allelic composition of the vernalization genes at VRN-A1 and VRN-B1 loci. Three gene based markers for VRN-Al and two for VRN-B1 locus were used. Thirty five T dicoccoides accessions had only winter type allele vrn-A1 at VRN-A1 locus. One accession each had VRNA1a and Vrn-A1d allele, and two accessions each showed the presence of VRN-A1b and Vrn-A1c, potent spring type alleles. Three accessions, however, had multiple alleles at VRN-Al locus. At the VRN-B1 locus 35 accessions had winter type allele vrn-B1 and 10 accession had dominant Vrn-B1 allele. These T dicoccoides accessions constitute a very useful resource for incorporation of alternative vernalization alleles in the cultivated wheat gene pool for developing better adaptive wheat varieties.