An integrated peach genome structural variation map uncovers genes associated with fruit traits

Area of Science:

• Plant Genomics
• Agricultural Science
• Genetics

Background:

• Structural variations (SVs) influence important traits in crops.
• Peach SV profiles and their functional roles are not well understood.

Purpose of the Study:

• To create an integrated map of structural variations in peach genomes.
• To identify SVs associated with domestication and agronomic traits.
• To discover candidate causal variants for peach improvement.

Main Methods:

• Integrated mapping of 202,273 SVs from 336 peach genomes.
• Genome-wide association studies (GWAS) for 26 agronomic traits.
• Functional analysis of candidate genes and variants.

Main Results:

• Identified 202,273 SVs, with many selected during peach domestication, affecting 2268 genes.
• Discovered candidate causal variants for traits including fruit maturity (9-bp insertion in NAC TF gene), flesh color (487-bp deletion in PpMYB10.1 promoter), and fruit shape (1.67 Mb inversion near PpOFP1).

Conclusions:

• The integrated SV map provides a valuable resource for peach genomics.
• Identified SVs and genes offer targets for future genomic research and breeding in peach.