Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity.

ABSTRACT: Stay-green trait enhances sorghum adaptation to post-flowering drought. Six stay-green backcross introgression lines (BILs) carrying one or more stay-green QTLs (Stg1-4) and their parents were characterized under non-stress (W₁₀₀: 100% of soil field capacity (FC)) and two levels of post-flowering drought (W₇₅: 75% FC; W₅₀: 50% FC) in a controlled condition. We aimed to study the response and identify the drought threshold of these QTLs under different levels of post-flowering drought and find traits closely contributing to grain yield (GY) under different drought severity. W₅₀ caused the highest reduction in BILs performance. From W₁₀₀ to W₅₀, the GY of the recurrent parent reduced by 70%, whereas that of the BILs reduced by

SUBMITTER: Kamal NM 

PROVIDER: S-EPMC6280221 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature