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Position: Home > Articles > Identification of herbicide resistance loci using a genome-wide association study and linkage mapping in Chinese common wheat The Crop Journal 2020,8 (4)

Identification of herbicide resistance loci using a genome-wide association study and linkage mapping in Chinese common wheat

作  者:
Cheng Shi;Yueting Zheng;Junyou Geng;Chunyi Liu;Huimin Pang;Yan Ren;Zhongdong Dong;Lei Zhao;Ning Zhang;Feng Che
单  位:
National Key Laboratory of Wheat and Maize Crop Science/Agronomy College, Henan Agricultural University, Zhengzhou 450046, Henan, China;National Key Laboratory of Wheat and Maize Crop Science/Agronomy College, Henan Agricultural University, Zhengzhou 450046, Henan, Chin
关键词:
Common wheat;Carfentrazone-ethyl;Herbicide resistance;Genome-wide association study;Quantitative trait locu
摘  要:
Carfentrazone-ethyl and tribenuron-methyl, the two widely used herbicides for weed control in field crops, frequently cause phytotoxicity to wheat seedlings in the field. In this study, a total of 697 wheat accessions containing three panels were scanned using wheat 90 K and 660 K SNP arrays to identify important herbicide resistance loci. Genome-wide association study (GWAS) revealed 329 significant single-nucleotide polymorphisms (SNPs) with phenotypic variance explained (PVE) of 11.3% to 27.6%. Among these SNPs, 15 were detected in multiple environments and they were mainly distributed on chromosomes 1B, 2D, 5B, 5D, 6D, and 7D. Further analysis indicated that gHR-5B (467-587 Mb), gHR-7D (46-52 Mb), and gHR-1B (517-580 Mb) were important herbicide resistance loci in wheat. Linkage mapping in a bi-parental population detected one QTL (qHR-IB) with PVE of 7.44% to 8.28%. This is reliable locus because its physical position (554-566 Mb) overlapped with gHR-1B by GWAS in the genome of Chinese Spring. This study provided some herbicide-resistant germplasm and important genetic loci for identifying genes of common wheat. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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