Common bean SNP alleles and candidate genes affecting photosynthesis under contrasting water regimes.

ABSTRACT: Water deficit is a major worldwide constraint to common bean (Phaseolus vulgaris L.) production, being photosynthesis one of the most affected physiological processes. To gain insights into the genetic basis of the photosynthetic response of common bean under water-limited conditions, a collection of 158 Portuguese accessions was grown under both well-watered and water-deficit regimes. Leaf gas-exchange parameters were measured and photosynthetic pigments quantified. The same collection was genotyped using SNP arrays, and SNP-trait associations tested considering a linear mixed model accounting for the genetic relatedness among accessions. A total of 133 SNP-trait associations were identified for net CO₂ assimilation rate, transpiration rate, stomatal conductance, and chlorophyl

SUBMITTER: Leitao ST 

PROVIDER: S-EPMC7775448 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature