Genetic loci regulating arsenic content in rice grains when grown flooded or under alternative wetting and drying irrigation.

ABSTRACT:

Background

Rice is a global staple crop, being the main calorific component of many people living subsistence livelihoods. Rice can accumulate toxic elements such as arsenic, with the crop water management strongly affecting uptake. This study utilises the Bengal and Assam Aus Panel to conduct genome wide association (GWA) mapping for arsenic in shoots and grains of rice grown over 2 years under continually flooded (CF) and alternate wetting and drying (AWD). The aim was to assess genotype by water management interaction, identify quantitative trait loci (QTL) for arsenic accumulation, and propose candidate genes for lowering grain arsenic.

Results

AWD significantly reduced grain arsenic across all cultivars on average by 15.7 and 15.1% in year 1 and 2 respectively and shoot

SUBMITTER: Norton GJ 

PROVIDER: S-EPMC6646650 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature