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.
21 Apr 2025
On 28 and 29 May, the first Redagrícola Cherry Conference, a technical reference event for the cherry sector, will be held in Monticello. Chilean and international experts will participate, focusing on innovation, climate and market.
12 Sep 2023
The new Chilean cherry season could increase by 20 percent, which would depend not only on climatic and logistical factors but also on the continued diversification of domestic and international ports handling fresh fruit exports. An effort by the entire supply chain will be need
05 Feb 2026
A research study from the University of Chile investigates how controlled atmosphere storage improves the shelf life of ‘Bing’ and ‘Lapins’ sweet cherries. Results show significant postharvest quality improvements under cold storage and market simulation conditions.
05 Feb 2026
With precision farming, it's now possible to prevent fruit cracking by optimizing irrigation, monitoring and data collection. Sensors, drones and AI support European growers in improving yield and fruit quality in cherries, grapes, citrus and pomegranates.
