Unveiling the genetic architecture for lodging resistance in rice (Oryza sativa. L) by genome-wide association analyses

作者：Muhammad Abdul Rehman Rashid, Yong Zhao, Farrukh Azeem, Yan Zhao, Hafiz Ghulam Muhu‐Din Ahmed, Rana Muhammad Atif, Yinghua Pan, Xiaoyang Zhu, Yuntao Liang, Hongliang Zhang, Danting Li, Zhanying Zhang, Zichao Li · 发表于：Frontiers in Genetics · 年份：2022 · DOI：10.3389/fgene.2022.960007 · 被引用次数：17 · 研究领域：Genetic Mapping and Diversity in Plants and Animals、Crop Yield and Soil Fertility、Genetics and Plant Breeding

Lodging is one of the major abiotic stresses, affecting the total crop yield and quality. The improved lodging resistance and its component traits potentially reduce the yield losses. The section modulus (SM), bending moment at breaking (M), pushing resistance (PR), and coefficient of lodging resistance (cLr) are the key elements to estimate the lodging resistance. Understanding the genetic architecture of lodging resistance–related traits will help to improve the culm strength and overall yield potential. In this study, a natural population of 795 globally diverse genotypes was further divided into two ( indica and japonica ) subpopulations and was used to evaluate the lodging resistance and culm strength–related traits. Significant diversity was observed among the studied traits. We carried out the genome-wide association evaluation of four lodging resistance traits with 3.3 million deep resolution single-nucleotide polymorphic (SNP) markers. The general linear model (GLM) and compressed mixed linear model (MLM) were used for the whole population and two subpopulation genome-wide association studies (GWAS), and a 1000-time permutation test was performed to remove the false positives. A total of 375 nonredundant QTLs were observed for four culm strength traits on 12 chromosomes of the rice genome. Then, 33 pleiotropic loci governing more than one trait were mined. A total of 4031 annotated genes were detected within the candidate genomic region of 33 pleiotropic loci. The fu...