Genome-wide association reveals novel genomic loci controlling rice grain yield and its component traits under water-deficit stress during the reproductive stage

Journal of Experimental Botany
Niteen N KadamS V Krishna Jagadish

Abstract

A diversity panel comprising of 296 indica rice genotypes was phenotyped under non-stress and water-deficit stress conditions during the reproductive stage in the 2013 and 2014 dry seasons (DSs) at IRRI, Philippines. We investigated the genotypic variability for grain yield, yield components, and related traits, and conducted genome-wide association studies (GWAS) using high-density 45K single nucleotide polymorphisms. We detected 38 loci in 2013 and 64 loci in 2014 for non-stress conditions and 69 loci in 2013 and 55 loci in 2014 for water-deficit stress. Desynchronized flowering time confounded grain yield and its components under water-deficit stress in the 2013 experiment. Statistically corrected grain yield and yield component values using days to flowering helped to detect 31 additional genetic loci for grain yield, its components, and the harvest index in 2013. There were few overlaps in the detected loci between years and treatments, and when compared with previous studies using the same panel, indicating the complexity of yield formation under stress. Nevertheless, our analyses provided important insights into the potential links between grain yield with seed set and assimilate partitioning. Our findings demonstrate th...Continue Reading

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Jun 11, 2017·Plant Physiology·Niteen N KadamS V Krishna Jagadish

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Citations

May 16, 2019·Journal of Experimental Botany·Giovanni MelandriHarro Bouwmeester
Dec 18, 2019·Journal of Experimental Botany·Giovanni MelandriCarolien Ruyter-Spira
May 12, 2019·Plant, Cell & Environment·Long LiRuilian Jing
Feb 21, 2021·Journal of Plant Physiology·Takuya Yoshida, Kazuko Yamaguchi-Shinozaki
Nov 2, 2020·Journal of Experimental Botany·Long LiRuilian Jing
Mar 30, 2021·Plant Physiology and Biochemistry : PPB·Preethi VijayaraghavareddySheshshayee Sreeman

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