Evolution, history and genomics of tomato fruit size and shape
Résumé
Within the EU-funded G2P-SOL initiative, a diverse set of 15,504 accessions of tomato and its wild relatives, derived from 7 worldwide genenbaks, were genotyped, featuring >150 K variants from 5 K loci. Additionally, fruit size and shape were determined by analyzing the available historical genebank data and photographs. This dataset was utilized to uncover the evolutionary trajectories of each genomic region, and to conduct a genome-wide association study (GWAS)..
Evolutionary patterns were discerned by calculating allelic frequencies across various groups, including S. pimpinellifolium (SP), wild and domesticated S. lycopersicum var. cerasiforme, Spanish vintage, Italian and American early improved materials, as well as modern improved varieties.
While most loci in the genome follow a straightforward pattern—exhibiting an allele nearing fixation in cultivated varieties, distinct from the SP allele—most QTLs encompassing known fruit size and shape genes diverged from this simple pattern. Instead, the results revealed more intricate evolutionary histories, highlighting distinctions between loci selected in Spain, Italy, or within more contemporary cultivars.
Domaines
Génétique des plantes| Origine | Fichiers produits par l'(les) auteur(s) |
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