| The maturity of wheat has an important role in determining the grain yield.In order to provide molecular marker for wheat molecular marker-assisted breeding, a population of 186 F6 RILs derived from a cross between Triticum spelta L.(Turtur) and synthetic hexaploid wheat(Bubo) was used to detect the QTLs for maturity.A high-density genetic map was constructed, which includes 5301 markers(4 120 Silico DArT, 621 SNPs and 560 traditional DArT array markers)with 2 464 cM.Using the field data in three years under four environments, QTLs associated with maturity were detected using composite interval mapping(CIM) method in Windows QTL Cartographer 2.5 software.Under the level of LOD＞2.5, a total of 15 QTLs were detected on 1A, 2B, 2D, 3A, 4A, 4B, 5B, 7A and 7B chromosomes.These QTLs could explain 4.42%-12.67% of phenotypic variance.Among them, the QTL on 1A chromosome has highest contribution rate.In the interval between 1215714 and 1068877F0-44CG on chromosome 4B, the QTL is only 0.01 cM away from 1215714 marker, which is almost co-separated.This study lays a solid foundation for the accuracy of molecular marker assisted selection. |
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