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Identification and mapping of a new powdery mildew resistance allele in the Chinese wheat landrace Hongyoumai

文献类型： 外文期刊

作者： Fu, Bisheng 1 ; Zhang, Zhiliang 1 ; Zhang, Qiaofeng 1 ; Wu, Xiaoyou 1 ; Wu, Jizhong 1 ; Cai, Shibin 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Germplasm Resources & Biotechnol, Jiangsu Prov Platform Conservat & Utilizat Agr Ge, Nanjing 210014, Jiangsu, Peoples R China

2.Nanjing Agr Univ, Nanjing 210095, Jiangsu, Peoples R China

关键词： Powdery mildew;Chinese wheat landrace;Molecular mapping;SSR markers;pmHYM

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

ISSN： 1380-3743

年卷期： 2017 年 37 卷 11 期

页码：

收录情况： SCI

摘要： Powdery mildew (Pm) caused by Blumeria graminis f. sp. tritici (Bgt) is one of the world's major wheat diseases and results in large grain yield losses. Discovery and utilization of Pm resistance genes constitute the most common strategy for wheat Pm control. Hongyoumai, a wheat landrace from Henan Province in China, has excellent resistance to infection by Bgt. In order to identify the basis of such Pm resistance, a segregating population was submitted to genetic analysis, which showed that Pm resistance in Hongyoumai was conferred by a single recessive resistance gene. This gene was temporarily named pmHYM. Molecular marker analysis, chromosomal location, resistance spectrum analysis, and an allelism test showed that pmHYM was located on the long arm of chromosome 7B (7BL), most likely representing a new recessive resistance gene allelic with Pm5e and mlXBD. By using 90-kb single-nucleotide polymorphism sequences (SNP) in the BLASTn analysis against the wheat 7BL genome sequence, 12 new simple sequence repeat (SSR) markers linked with pmHYM were developed to map pmHYM co-segregating with the marker Xmp1207 and between markers Xmp925 and Xmp1158, at genetic distances of 2.8 and 2.7 cM, respectively. In addition, physical mapping of the markers linked with pmHYM using Chinese Spring deletion lines indicated a location in the 0.86-1.00 bin of 7BL.

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