Genomic signals of ecogeographic adaptation in a wild relative are associated with improved wheat performance under drought stress
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View abstract on PubMed
Summary
This summary is machine-generated.Wild wheat relatives like Aegilops tauschii harbor diversity for improving crop adaptation to drought. Genome-wide environmental scans identified climate-adaptive alleles that enhance wheat performance under water-limiting conditions.
Area Of Science
- Plant genetics
- Crop adaptation
- Evolutionary biology
Background
- Improving crop adaptation to drought-prone environments requires prioritizing wild relative diversity.
- Identifying useful genetic diversity in wild relatives for crop improvement is challenging.
Purpose Of The Study
- To combine genome-wide environmental scans (GWES) in Aegilops tauschii (Ae. tauschii) with allele testing in wheat.
- To identify genetic diversity for enhancing wheat adaptation to water-limiting conditions.
Main Methods
- Genome-wide environmental scans (GWES) in Ae. tauschii.
- Allele testing in wheat introgression lines.
- Phenotyping under irrigated and water-limiting conditions using drone-based imaging and conventional methods.
Main Results
- Climatic gradients explained over half of the genomic variation in Ae. tauschii.
- Many climate-associated alleles in Ae. tauschii improved introgression line performance under water stress.
- GWES signals for temperature annual range correlated with reduced canopy temperature and increased yield in introgression lines.
Conclusions
- Introgression of climate-adaptive alleles from Ae. tauschii can improve wheat performance in water-limited environments.
- Variants influencing leaf temperature regulation are likely targets of selection in wild relatives.
- GWES in wild relatives can uncover adaptive variation to enhance crop climate resilience.
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