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.
08 May 2025
Discover how Drosophila suzukii selects darker, softer, and sweeter cherries for egg-laying. A study in China on six cultivars analyzes factors influencing larval development and infestation, providing useful insights for integrated pest management in cherry orchards.
24 May 2024
Although the season is a few days late, Washington, which is close to cherry production on the West Coast, is early. ‘There is a rush to get into the market before Washington starts producing, which usually reduces the value of the crop.’
22 Jul 2026
From July 15 to August 15, Canadian Cherry Month encourages shoppers to check labels, bags and store signs before buying Canadian sweet cherries. The BC Cherry Association campaign supports local growers and promotes the Flip & Share contest with weekly prizes available.
22 Jul 2026
A study of three Hungarian sour cherry cultivars examines how ripening, sugars, organic acids, vitamin C, anthocyanins, polyphenols and melatonin shape fruit quality, nutraceutical value and the best harvest time for fresh markets and industrial processing applications.
