An identical-by-descent segment harbors a 12-bp insertion determining fruit softening during domestication and speciation in Pyrus.

ABSTRACT:

Background

Although the wild relatives of pear originated in southwest China, this fruit crop was independently domesticated and improved in Asia and Europe, and there are major phenotypic differences (e.g., maturity and fruit firmness) between Asian and European pears.  RESULTS: In this study, we examined the genomes of 113 diverse pear accessions using an identity-by-descent (IBD) approach to investigate how historical gene flow has shaped fruit firmness traits in Asian and European pears. We found a 3-Mbp IBD-enriched region (IBD-ER) that has undergone "convergent domestication" in both the Asian and European pear lineages, and a genome-wide association study (GWAS) of fruit firmness phenotypes strongly implicated the TRANSLOCON AT THE INNER CHLOROPLAST ENVELOPE55 (TIC55) locus

SUBMITTER: Song B 

PROVIDER: S-EPMC9526952 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature