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• W4309442488 abstract "Abstract Understanding the genetic basis of traits of economic importance under drought stress (DS) and well-watered (NS) conditions is important in enhancing genetic gains in dry beans ( Phaseolus vulgaris L.). This research aims to: (i) identify markers associated with agronomic and physiological traits for drought tolerance and (ii) identify drought-related putative candidate genes within the mapped genomic regions. An Andean and Mesoamerican diversity panel (AMDP) comprising of 185 genotypes was screened in the field under drought stress (DS) and well-watered (NS) conditions for two successive seasons. Agronomic and physiological traits, viz ., days to 50% flowering (DFW), plant height (PH), days to physiological maturity (DPM), grain yield (GYD), 100-seed weight (SW), leaf temperature (LT), leaf chlorophyll content (LCC) and stomatal conductance (SC) were phenotyped. Principal component and association analysis were conducted using filtered 9370 Diversity Arrays Technology sequencing (DArTseq) markers. The mean PH, GYD, SW, DPM, LCC and SC of the AMDP was reduced by 12.1, 29.6, 10.3, 12.6, 28.5 and 62.0%, respectively under DS. Population structure analysis revealed two sub-populations, which correspond to the Andean and Mesoamerican gene pools. Markers explained 0.08 – 0.10, 0.22 – 0.23, 0.29 – 0.32, 0.43 – 0.44, 0.65 – 0.66 and 0.69 – 0.70 of the total phenotypic variability ( R 2 ) for SC, LT, PH, GYD, SW and DFW, respectively under DS conditions. For NS, R 2 varied from 0.08 (LT) to 0.70 (DPM). Overall, 68 significant (p < 10 −03 ) marker-trait associations (MTAs) and 22 putative candidate genes were identified across DS and NS conditions. Most of the identified genes had known biological functions related to regulating the response to moisture stress. The findings provide new insights into the genetic architecture of moisture stress tolerance in common bean. The findings also provide potential candidate SNPs and putative genes that can be utilized in gene discovery and marker-assisted breeding for drought tolerance after validation." @default.
• W4309442488 created "2022-11-27" @default.
• W4309442488 creator A5027791724 @default.
• W4309442488 creator A5036939289 @default.
• W4309442488 creator A5063787948 @default.
• W4309442488 creator A5067013814 @default.
• W4309442488 creator A5067387438 @default.
• W4309442488 creator A5085274491 @default.
• W4309442488 date "2022-11-20" @default.
• W4309442488 modified "2023-09-28" @default.
• W4309442488 title "Identification of genomic regions of dry bean (<i>Phaseolus vulgaris</i>L.) associated with agronomic and physiological traits under drought stressed and well-watered conditions using genome-wide association study" @default.
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