Sweet cherry production in France has been in decline since the 1980s, influenced by climate change and biological pressures. Traditional selection is long and complex due to the prolonged juvenile stage and the complexity of polygenic traits, but advances in genetic research have identified key markers through quantitative locus mapping (QTL) and genome-wide association studies (GWAS).
However, genotyping by sequencing (GBS) is emerging as a cost-effective solution to analyse high-density SNPs and improve selection strategies.
'Horticulture Research' published in September 2023 a study entitled 'Genome-wide association mapping in a sweet cherry germplasm collection (Prunus avium L.) reveals candidate genes for fruit quality traits'. This study used a germplasm collection of 116 sweet cherry accessions to analyse 23 agronomic fruit quality traits over a period of 2-6 years, showing high phenotypic variation.
Subsequently, SNPs were analysed by GBS, and GWAS studies identified 65 unique SNP-trait associations for eight traits, including candidate genes in phytohormone, calcium and cell wall metabolisms. In order to identify colocalising SNP-trait associations for fruit quality traits, the researchers synthesised the results of this study and nine previous articles, identifying a total of 11 and 12 candidate genes for fruit size and fruit splitting traits.
The study's methodology characterised phenotypic variation, revealing high broad-spectrum heritability for many traits, suggesting a strong genetic component. GBS sequencing produced a rich set of SNPs, facilitating the identification of genetic associations between multiple traits. Analysis of population structure revealed distinct subpopulations, contributing to a deeper understanding of genetic diversity in the collection.
The identified SNP-tract associations, supported by a thorough literature review, improve the understanding of genetic control of fruit quality in sweet cherry. This knowledge is crucial for the development of marker-assisted selection strategies, accelerating selection efforts to meet consumer preferences and producer requirements by addressing the complexity of the genetic architecture of sweet cherry and its impact on fruit quality traits.
Image 1: Pearson correlation matrix of the 23 studied traits.
Read the full article: EurekAlert!
Image: Horticulture Research
22 May 2025
Washington Fruit Growers unveils a new cherry packing line developed with Unitec. The facility boosts production capacity and brings in advanced technology to ensure quality, flexibility, and speed in meeting the growing global market demand.
20 May 2025
Chilean growers embrace the Humic strategy to enhance cherry color, size, and uniformity. Results from the 2023 and 2024 seasons confirm higher quality, productive yield and profitability using Revital®, Potaliq® and Humic Kolour®, successfully tested across Europe.
27 Jan 2026
The 3rd Cherry Postharvest Course, led by advisor Patricio Morales, gathered over 250 industry experts to enhance the postharvest quality of Chilean cherries. Focus on plant diseases, biological strategies, and goals for an increasingly competitive global export market.
27 Jan 2026
Innovar launches a project to test and develop new IP cherry varieties from renowned European programmes like Gräb, JKI and Schwitzky. The initiative spans key Australian regions, focusing on premium quality, extended seasonality and long export-grade shelf life.
