Genetic analyses of lodging resistance and yield provide insights into post-Green-Revolution breeding in rice.

ABSTRACT: Lodging reduces grain yield in cereal crops. Understanding the genetic basis of lodging resistance (LR) benefits LR breeding. In the study, 524 accessions from a rice germplasm collection and 193 recombinant inbred lines were phenotyped for 17 LR-related traits. Height and culm strength (the magnitude of applied force necessary to break the culm) were two major factors affecting LR. We conducted genome-wide association study (GWAS) and identified 127 LR-associated loci. Significant phenotypic correlations between culm-strength traits and yield-related traits were observed. To reveal the genetic relationship between them, we conducted GWAS of culm-strength traits with adding yield-related trait as a covariate and detected 63 loci linking culm strength and yield. As a proof, a near-isogenic

SUBMITTER: Guo Z 

PROVIDER: S-EPMC8051602 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature