Genome-wide QTL mapping for stripe rust resistance in spring wheat line PI 660122 using the Wheat 15K SNP array

Frontiers in Plant Science

Plant Science

Yong Ren¹  Meinan Wang²  Xianming Chen³  Guoyun Jia⁴  Xinli Zhou⁴  Ran Tian⁴  Junming Feng⁴  Xin Li⁴  Qiong Yan⁴  Kebing Huang⁴  Xiaochen Zheng⁴  Suizhuang Yang⁴  Binfan Si⁴  Xiaoqin Luo⁴  Wenjing Tan⁴ 

[1]Crop Characteristic Resources Creation and Utilization Key Laboratory of Sichuan Province, Mianyang Institute of Agricultural Science, Mianyang, Sichuan, China

[2]Department of Plant Pathology, Washington State University, Pullman, WA, United States

[3]Department of Plant Pathology, Washington State University, Pullman, WA, United States

[4]Wheat Health, Genetics, and Quality Research Unit, US Department of Agriculture-Agricultural Research Service (USDA-ARS), Pullman, WA, United States

[5]Wheat Research Institute, School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China

关键词: stripe rust;    wheat;    resistance;    QTL mapping;    yellow rust;   

DOI  :  10.3389/fpls.2023.1232897

 received in 2023-06-01, accepted in 2023-07-31,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionStripe rust is a global disease of wheat. Identification of new resistance genes is key to developing and growing resistant varieties for control of the disease. Wheat line PI 660122 has exhibited a high level of stripe rust resistance for over a decade. However, the genetics of stripe rust resistance in this line has not been studied. A set of 239 recombinant inbred lines (RILs) was developed from a cross between PI 660122 and an elite Chinese cultivar Zhengmai 9023.MethodsThe RIL population was phenotyped for stripe rust response in three field environments and genotyped with the Wheat 15K single-nucleotide polymorphism (SNP) array.ResultsA total of nine quantitative trait loci (QTLs) for stripe rust resistance were mapped to chromosomes 1B (one QTL), 2B (one QTL), 4B (two QTLs), 4D (two QTLs), 6A (one QTL), 6D (one QTL), and 7D (one QTL), of which seven QTLs were stable and designated as QYrPI660122.swust-4BS, QYrPI660122.swust-4BL, QYrPI660122.swust-4DS, QYrPI660122.swust-4DL, QYrZM9023.swust-6AS, QYrZM9023.swust-6DS, and QYrPI660122.swust-7DS. QYrPI660122.swust-4DS was a major all-stage resistance QTL explaining the highest percentage (10.67%–20.97%) of the total phenotypic variation and was mapped to a 12.15-cM interval flanked by SNP markers AX-110046962 and AX-111093894 on chromosome 4DS.DiscussionThe QTL and their linked SNP markers in this study can be used in wheat breeding to improve resistance to stripe rust. In addition, 26 lines were selected based on stripe rust resistance and agronomic traits in the field for further selection and release of new cultivars.

【 授权许可】

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Copyright © 2023 Yan, Jia, Tan, Tian, Zheng, Feng, Luo, Si, Li, Huang, Wang, Chen, Ren, Yang and Zhou