Increasing flooding tolerance in rice: combining tolerance of submergence and of stagnant flooding.

ABSTRACT:

Background and aims

Rice ecosystems in the tropical coastal areas are subject to two types of flooding stress: transient complete submergence and long-term water stagnation (stagnant flooding). Here, we aimed to dissect the mechanisms for stagnant flooding tolerance of rice genotypes carrying SUB1, a quantitative trait locus for submergence tolerance.

Methods

We screened 80 elite genotypes under stagnant flooding stress in the lowland rice fields in the wet and dry seasons, and examined the tolerance mechanisms of promising genotypes for the two following seasons.

Key results

Yield reduction under stagnant flooding averaged 48 % in the dry season and 89 % in the wet season. Elite genotypes carrying SUB1 showed 49 % lower yield than those without SUB1 under stagnant fl

SUBMITTER: Kato Y 

PROVIDER: S-EPMC6944782 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature