Genetic basis and identification of candidate genes for salt tolerance in rice by GWAS.

ABSTRACT: Soil salinity is a major factor affecting rice growth and productivity worldwide especially at seedling stage. Many genes for salt tolerance have been identified and applied to rice breeding, but the actual mechanism of salt tolerance remains unclear. In this study, seedlings of 664 cultivated rice varieties from the 3000 Rice Genome Project (3K-RG) were cultivated by hydroponic culture with 0.9% salt solution for trait identification. A genome-wide association study (GWAS) of salt tolerance was performed using different models of analysis. Twenty-one QTLs were identified and two candidate genes named OsSTL1 (Oryza sativa salt tolerance level 1) and OsSTL2 (Oryza sativa salt tolerance level 2) were confirmed using sequence analysis. Haplotype and sequence analysis revealed that gene OsSTL1

SUBMITTER: Yuan J 

PROVIDER: S-EPMC7305297 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature