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.
04 Oct 2024
Officials stated that the estimated harvest of 8,700 tons for this season has decreased by 33% compared to the previous year and by 35% compared to the annual average. The annual harvest has fallen below 10,000 tons only once in the last decade: 9,160 tons in 2021.
16 Jan 2025
The study conducted at the University of Guizhou (China) aimed to investigate the impact of the dwarfing rootstock ‘Pd1’ (Prunus tomentosa) on sweet cherry ‘Shuguang2’ shoots. To achieve this goal, morphological observations were conducted.
14 Aug 2025
The Cereza del Jerte PDO ends the 2025 season with 1.3 million kg certified, driven by Picota and the introduction of new varieties like Lapins, Van and Burlat. A climate-friendly season with top-quality fruit and an extended market availability period.
14 Aug 2025
Agrotrade Perú 2025 put cherries and fruit genetics at the heart of the debate. Experts from Chile and Peru explored agroexport opportunities, the role of finance, and binational cooperation, opening new perspectives for the future of Peruvian fruit production.
