The progress in sweet cherry (Prunus avium L.) breeding has been marked by the identification of molecular markers for crucial traits, utilizing genome sequencing for marker-assisted selection (MAS). Despite these achievements, quantitative trait locus (QTL) analyses have often lacked resolution, leading to missed gene associations.
Traditional breeding methods face challenges related to low efficiency and high costs. Recent developments in whole-genome sequencing have uncovered nearly 2 million single nucleotide polymorphisms (SNPs), promising higher marker density for genome-wide association studies (GWAS). However, uneven SNP distribution remains an obstacle, hindering the identification of candidate genes. The current hurdle is to leverage GWAS potential for high-resolution mapping to expedite the breeding of improved sweet cherry varieties.
Researchers employed paired-end sequencing on the Illumina NovaSeq 6000 platform, generating a 4.15-Tb sequence with samples contributing 7.6–36.8 Gb each. The extensive genome coverage allowed the identification of 1,767,106 high-quality SNPs distributed across the accessions. Principal component analysis (PCA) and Bayesian information criterion (BIC) indicated a homogeneous population without distinct genetic subgroups.
Phenotypic diversity assessed from 2012 to 2020 revealed significant variability across traits, with Collection of Genetic Resources (CGR) accessions displaying more pronounced diversity than breeding materials (BM). Notable differences in color traits and fruit size were observed, aligning with the goals of selective breeding.
Collection of Genetic Resources population structure analysis. A) Principal component (PC) analysis plot of the first two PCs identified from 235 accessions based on 1,767,106 single nucleotide polymorphisms. B) Heat map of a kinship matrix estimated using the VanRaden algorithm. Both plots were generated with GAPIT.
Source: EurekAlert!
Image: High-resolution genome-wide association study of a large Czech collection of sweet cherry (Prunus avium L.) on fruit maturity and quality traits - Scientific Figure on ResearchGate. https://www.researchgate.net/figure/Collection-of-Genetic-Resources-population-structure-analysis-A-Principal-component_fig1_364394570.
24 Oct 2025
Australia launches a new strategy to triple cherry exports by 2030, focusing on quality, premium markets, grower training and market access. Led by Hort Innovation, the plan aims to position Australian cherries as a top-tier product in international markets.
06 Jun 2024
‘Nature's Candy and the jumbo cherry programme, XXL Cherries, guarantee something for every buyer,’ said Joel Hewitt. ‘Our goal remains to provide cherries of exceptional flavour and size, ensuring repeat business.
06 Feb 2026
A study in China's Shanxi province compares 4 sweet cherry cultivars using untargeted metabolomics, revealing key differences in nutritional profile, physical traits and consumer preference. Focus on Huangmi, Tieton, Pioneer and Sunburst varieties.
06 Feb 2026
Advanced harvesting, cooling and packaging methods allow Chilean cherries to maintain quality and taste for up to 35 days. Learn how refrigeration and modified atmosphere packaging help preserve freshness, color, and fruit integrity for international export.
