Genetic Mapping and Candidate Gene Prediction of a QTL Related to Early Heading on Wild Emmer Chromosome 7BS in the Genetic Background of Common Wheat

Heading date (HD) is an essential agronomic objective in wheat conventional breeding. Field experiments from several years and locations indicated that the chromosome arm substitution line (CASL) of wild emmer 7BS genetic background common var. Chinese Spring (CS) always showed a substantially earlier HD than CS planted different seasons; usually about 8 d grown under normal autumn sowing season. CASL7BS consistently much when treated for vernalization long or short photoperiod then growth room. faster spike development at stages before glume stage days, depicted relatively rapid all days. To map early gene CASL7BS, F2 plants cross were field room, forming two mapping populations (P1 P2, respectively). According to distribution P1, was most likely regulated by dominant gene. A QTL detected distal region 8.94 cM flanked C268 C309 with LOD scores 5–8, explaining 9.14 12.35% phenotypic variation populations. The further narrowed down interval between ZAFU058724 ZAFU061354 58–61 Mb based on genotype F3 F4 families. total 41 genes located this region, eleven them thought be candidate functions. location, identified study new associated flowering, which will helpful understanding mechanism flowering breeding variety.