Genome-wide association in tomato Reveals 44 candidate loci for fruit metabolic traits - Archive ouverte HAL
Article Dans Une Revue Plant Physiology Année : 2014

Genome-wide association in tomato Reveals 44 candidate loci for fruit metabolic traits

Résumé

Genome-wide association studies have been successful in identifying genes involved in polygenic traits and are valuable for crop improvement. Tomato ([i]Solanum lycopersicum[/i]) is a major crop and is highly appreciated worldwide for its health value. We used a core collection of 163 tomato accessions composed of [i]S. lycopersicum,[/i] [i]S. lycopersicum var cerasiforme[/i], and [i]Solanum pimpinellifolium[/i] to map loci controlling variation in fruit metabolites. Fruits were phenotyped for a broad range of metabolites, including amino acids, sugars, and ascorbate. In parallel, the accessions were genotyped with 5,995 single-nucleotide polymorphism markers spread over the whole genome. Genome-wide association analysis was conducted on a large set of metabolic traits that were stable over 2 years using a multilocus mixed model as a general method for mapping complex traits in structured populations and applied to tomato. We detected a total of 44 loci that were significantly associated with a total of 19 traits, including sucrose, ascorbate, malate, and citrate levels. These results not only provide a list of candidate loci to be functionally validated but also a powerful analytical approach for finding genetic variants that can be directly used for crop improvement and deciphering the genetic architecture of complex traits

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Christopher Sauvage, Vincent Segura, Guillaume Bauchet, Rebecca Stevens, Phuc Thi Do, et al.. Genome-wide association in tomato Reveals 44 candidate loci for fruit metabolic traits. Plant Physiology, 2014, 165 (3), pp.1120-1132. ⟨10.1104/pp.114.241521⟩. ⟨hal-01268579⟩
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