Genome-wide association study identifies favorable SNP alleles and candidate genes for frost tolerance in pea

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Beji, Sana | Fontaine, Véronique | Devaux, Rosemonde | Thomas, Martine | Negro, Sandra Silvia | Bahrman, Nasser | Siol, Mathieu | Aubert, Grégoire | Burstin, Judith | Hilbert, Jean-Louis | Delbreil, Bruno | Lejeune-Hénaut, Isabelle

Edité par HAL CCSD ; BioMed Central

International audience. Frost is a limiting abiotic stress for the winter pea crop (Pisum sativum L.) and identifying the genetic determinants of frost tolerance is a major issue to breed varieties for cold northern areas. Quantitative trait loci (QTLs) have previously been detected from bi-parental mapping populations, giving an overview of the genome regions governing this trait. The recent development of high-throughput genotyping tools for pea brings the opportunity to undertake genetic association studies in order to capture a higher allelic diversity within large collections of genetic resources as well as to refine the localization of the causal polymorphisms thanks to the high marker density. In this study, a genome-wide association study (GWAS) was performed using a set of 365 pea accessions. Phenotyping was carried out by scoring frost damages in the field and in controlled conditions. The association mapping collection was also genotyped using an Illumina Infinium® BeadChip, which allowed to collect data for 11,366 single nucleotide polymorphism (SNP) markers.

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