Multi‐environment association study highlights candidate genes for robust agronomic quantitative trait loci in a novel worldwide Capsicum core collection - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles The Plant Journal Year : 2023

Multi‐environment association study highlights candidate genes for robust agronomic quantitative trait loci in a novel worldwide Capsicum core collection

Hatice Filiz Boyaci
Ramazan Ozalp
  • Function : Author
Roland Schafleitner
Derek Barchenger

Abstract

Investigating crop diversity through genome‐wide association studies (GWAS) on core collections helps in deciphering the genetic determinants of complex quantitative traits. Using the G2P‐SOL project world collection of 10 038 wild and cultivated Capsicum accessions from 10 major genebanks, we assembled a core collection of 423 accessions representing the known genetic diversity. Since complex traits are often highly dependent upon environmental variables and genotype‐by‐environment (G × E) interactions, multi‐environment GWAS with a 10 195‐marker genotypic matrix were conducted on a highly diverse subset of 350 Capsicum annuum accessions, extensively phenotyped in up to six independent trials from five climatically differing countries. Environment‐specific and multi‐environment quantitative trait loci (QTLs) were detected for 23 diverse agronomic traits. We identified 97 candidate genes potentially implicated in 53 of the most robust and high‐confidence QTLs for fruit flavor, color, size, and shape traits, and for plant productivity, vigor, and earliness traits. Investigating the genetic architecture of agronomic traits in this way will assist the development of genetic markers and pave the way for marker‐assisted selection. The G2P‐SOL pepper core collection will be available upon request as a unique and universal resource for further exploitation in future gene discovery and marker‐assisted breeding efforts by the pepper community.

Dates and versions

hal-04185847 , version 1 (23-08-2023)

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Louis McLeod, Lorenzo Barchi, Giorgio Tumino, Pasquale Tripodi, Jérémy Salinier, et al.. Multi‐environment association study highlights candidate genes for robust agronomic quantitative trait loci in a novel worldwide Capsicum core collection. The Plant Journal, 2023, ⟨10.1111/tpj.16425⟩. ⟨hal-04185847⟩
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