Allelic variation in rice Fertilization Independent Endosperm 1 contributes to grain width under high night temperature stress.

ABSTRACT: A higher minimum (night-time) temperature is considered a greater limiting factor for reduced rice yield than a similar increase in maximum (daytime) temperature. While the physiological impact of high night temperature (HNT) has been studied, the genetic and molecular basis of HNT stress response remains unexplored. We examined the phenotypic variation for mature grain size (length and width) in a diverse set of rice accessions under HNT stress. Genome-wide association analysis identified several HNT-specific loci regulating grain size as well as loci that are common for optimal and HNT stress conditions. A novel locus contributing to grain width under HNT conditions colocalized with Fie1, a component of the FIS-PRC2 complex. Our results suggest that the allelic difference controlling gra

SUBMITTER: Dhatt BK 

PROVIDER: S-EPMC7756756 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature