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This research aims to explore the genetic basis of heat-responsive traits in pepper to enhance heat tolerance.

March 14, 2026BMC Plant BiologyOpen Access

Unravelling the genetics of heat-responsive fruit traits in pepper Capsicum annuum L. via GWAS under subtropical climates

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GWAS identifies heat tolerance traits in Capsicum annuum L., suggesting genetic strategies for improved resilience.

This research aims to explore the genetic basis of heat-responsive traits in pepper to enhance heat tolerance.
Assessed 146 diverse accessions across two seasons under heat stress conditions.
Conducted genome-wide SNP screening identifying 292.91 million biallelic SNPs.
Applied a pooled ANOVA to analyze significant genotype × season interactions for various traits.
Employed the BLINK model for GWAS to identify significant major trait associations (MTAs).
Identified 58 significant MTAs, with 14 consistent across seasons.
Noted high heritability (>60%) for key traits indicating strong selection suitability.
Mapped genotypic effects on leaf length, fruit width, and seed weight.
Revealed three genetic subpopulations with extended linkage disequilibrium.

Yogananda et al. (2026) studied this question.

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