Molecular identification and validation of four stable QTL for adult-plant resistance to powdery mildew in Chinese wheat cultivar Bainong 64
文献类型： 外文期刊
作者： Xu, Xiaowan 1 ; Sun, Daojie 1 ; Ni, Zhongqiu 2 ; Zou, Xinyu 2 ; Xu, Xiaoting 2 ; Sun, Mengjing 2 ; Cao, Qiang 1 ; Tong, Jingyang 2 ; Ding, Fugong 2 ; Zhang, Yelun 3 ; Wang, Fengju 2 ; Dong, Yachao 2 ; Zhang, Luyan 2 ; Wang, Jiankang 2 ; Xia, Xianchun 2 ; He, Zhonghu 2 ; Hao, Yuanfeng 2 ;
作者机构： 1.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Agr Sci CAAS, Inst Crop Sci, Beijing 100081, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Key Lab Crop Genet & Breeding Hebei Prov, Inst Cereal & Oil Crops, Shijiazhuang 050035, Hebei, Peoples R China
4.CAAS, Int Maize & Wheat Improvement Ctr CIMMYT, China Off, 12 Zhongguancun South St, Beijing 100081, Peoples R China
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）
ISSN： 0040-5752
年卷期： 2023 年 136 卷 11 期
页码：
收录情况： SCI
摘要： Wheat powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a devastating fungal disease. Seedlings of Chinese wheat Bainong 64 are susceptible to Bgt, but adult plants have maintained resistance since it was released in 1996. A population of 171 recombinant inbred lines (RILs) developed from cross Jingshuang 16/Bainong 64 (JS16/BN64) was used to dissect genetic components of powdery mildew resistance. A genetic map comprising 5383 polymorphic markers was constructed using the 15 K SNP chip and kompetitive allele-specific PCR (KASP) markers. Composite interval mapping identified four stable QTL with favorable alleles all from BN64 on chromosome arms 1DL, 2BS, 2DL, and 6BL in at least four environments. They accounted for 8.3%, 13.8%, 14.4%, and 9.0% of the total phenotypic variation explained (PVE) in maximum, respectively. QPmjbr.caas-1DL, situated about 22 Mb from centromere, is probably a new QTL. QPmjbr.caas-2DL located near the end of arm 2DL and explained the largest PVE. Using genetic maps populated with KASP markers, QPmjbr.caas-2BS and QPmjbr.caas-6BL were fine mapped to a 1.8 cM genetic intervals spanning 13.6 Mb (76.0-89.6 Mb) and 1.7 cM and 4.9 Mb (659.9-664.8 Mb), respectively. The four QTL independent of stripe rust and leaf rust resistance were validated for powdery mildew resistance in another RIL population related to BN64 and a cultivar panel using representative KASP markers. Since BN64 has been a leading cultivar and an important breeding parent in China, the QTL and markers reported in this study will be useful for marker-assisted selection of APR.
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