小麦赤霉病抗性QTL 分析

With the population of 104 F7-derived recombinant inbred (RI) lines from Wangshuibai (resistance to Fusarium head blight) and Alondra (Susceptible) as mapping population , the wheat genetic map consisting of 2 RAPDs, 109SSRs and 105 AFLPs markers was constructed by JoinMap ○R 3.0 software. Up to 24 of the 25 identified linkage groups were identified to the chromosome. The FHB resistance of RI lines was evaluated by natural infection and soil surface inoculation in Jianyang and Suzhou for two years. The results showed that resistance to FHB was inherited in a quantitative manner and controlled by few genes with major effects, but the expression of these resistance genes were strongly affected by environment. 10 QTLs, 8 derived from Wangshuibaiand 2 from Alondra, associated with FHB resistance were detected usingMapQTL○R 4.0 software. They were located on the chromosomes2A , 3B , 4A , 4D , 5A , 5B , 6A , 6B , 7A and explained 813 % - 2316 % of the phenotypic variance for FHB resistance respectively. It is suggested that the flanking markers of QTL may be used in the breeding for resistance to FHB by marker assisted selection.