Genes involved in floral meristem in tomato exhibit drastically reduced genetic diversity and signature of selection.

摘要: Domestication and selection of crops have notably reshaped fruit morphology. With its large phenotypic diversity, tomato (Solanum lycopersicum) illustrates this evolutive trend. Genes involved in flower meristem development are known to regulate also To decipher the genetic variation underlying morphology, we assessed nucleotide diversity footprints candidate genes performed genome-wide association studies. Thirty were selected according their similarity with or causal function Arabidopsis thaliana. In tomato, these flanking regions sequenced a core collection 96 accessions (including cultivated, cherry-type wild relative accessions) maximizing molecular using Roche 454 technology. A total amount 17 Mb was allowing discovery 6,106 single polymorphisms (SNPs). The annotation 30 gene identified 231 exons carrying 517 SNPs. Subsequently, (π) neutral evolution each region compared against values within collection, SNP array 7,667 SNPs mainly distributed coding sequences. About half revealed putatively size by showing negative Tajima's D reduction cultivated relative. Among candidates, FW2.2 BAM1 sequences promoter suggesting potential involvement regulation. Two associations co-localized previously loci: LC (locule number) Ovate (fruit shape). Compared whole genome genotypic data, drastic shown for several genes. Strong patterns 15 candidates highlighting critical role maintenance as well impact domestication on candidates. study highlighted set important