Molecular Mapping of Powdery Mildew Resistance Genes in Wheat Line 91260

作者：Zhang Xiangzha · 发表于：Mailei zuowu xuebao · 年份：2015 · 被引用次数：4 · 研究领域：Wheat and Barley Genetics and Pathology、Plant Disease Resistance and Genetics、Plant Pathogens and Resistance

Powdery mildew is one of the most devastating diseases of common wheat( Triticum aestivum L.)that leads to severe yield loss in the world. Common wheat line 91260 is immune to Bgt isolate E09 at the adult stage. In order to provide reference to cultivate powdery mildew resistance cultivar,a F2 population derived from a cross between 91260 and susceptible cultivar Yumai 49 were used as materials to conduct genetic analysis. The segregation ratio was 9 ∶ 7,which indicated that 91260 carried two complementary dominant genes(temporarily designated as Ml91260-1 and Ml91260-2). Molecular mapping anchored the two resistance genes on chromosome 2AL and 2BL,respectively. Ml91260-1 on 2AL was flanked by microsatellite markers Xcfa2263 and Xwmc170,with genetic distance of 8. 3 c M and 4. 1 c M,respectively. Ml91260-2 on 2BL was flanked by simple sequence repeat( SSR) markers Xgpw4103 and Xwmc332,with genetic distance of 4. 1 c M and 6. 7 c M,respectively,which was proved to be a novel PM resistance gene.