Overview
Genome Size
240 Mb
Date performed
2021
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Publication
Abstract
Background: Prunus species, including Tibetan peach (Prunus mira), are economically important fruit crops. However, the genetic mechanisms underlying their favorable traits are poorly understood, partly due to the scarcity of genomic resources. Structural variations (SVs) are a major source of genomic variation but their impacts on phenotypic traits in these species remain underexplored.
Results: A high-quality de novo genome assembly for Tibetan peach (Prunus mira) was generated, along with assemblies for four other Prunus species. These genomes range from 240 to 276 Mb in size, with 25,333–27,826 protein-coding genes. Phylogenetic analysis showed that plum diverged from its common ancestor with peach, Tibetan peach (Prunus mira), and apricot approximately 7 million years ago. Whole-genome resequencing of 417 peach accessions identified numerous SNPs, small indels, and SVs. SV-based genome-wide association studies (GWAS) revealed associations between SVs and key agronomic traits, providing insights into the genetic basis of these traits in Prunus species including Tibetan peach.
Conclusions: The genome assembly of Tibetan peach (Prunus mira) provides valuable genomic resources for functional genomics, evolutionary research, and agronomic improvement of Prunus species. The study highlights the importance of SVs in driving functional discoveries, which can be applied to better understand and improve traits in Tibetan peach and related species.
