大白菜芜菁花叶病毒病抗性遗传及分子标记筛选

为了对大白菜芜菁花叶病毒病的抗性遗传规律进行研究,并筛选相关的分子标记,分别以高抗TuMV的高代自交系材料73和感TuMV的自交系材料06-247为亲本,构建其BC1群体,运用摩擦接种法以TuMV的C4株系对上述群体进行接种,同时采用生物学观察法进行抗病性鉴定,采用BSA法筛选相关基因的分子标记。研究结果表明,在该试验组合中,TuMV抗性是由一对隐性基因控制的,筛选出与该基因连锁的3个分子标记BrID90143(4.2 cM)、BrSSR4068(4.2 cM)和BrID10645(10.1 cM),为大白菜抗TuMV分子标记辅助选择及相关基因的精细定位奠定了基础。

Identification of Molecular Markers Linked to TuMV Resistant Gene in Cabbage

A total of 144 F2 individuals were obtained from the crossing between 1047 (susceptible) and A21 (resistant). Two RAPD markers were screened out in 200 random primers using BSA(Bulked Segregant Analysis). Two RAPD markers, designated as AG13/2000 and U16/660, were 7.7 cM and 8.38 cM apart from the TuMV resistant gene, respectively. The two RAPD fragments were converted to SCAR markers. SCAR markers were confined in germplasm.