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
29 Jan 2025
These advances are the result of a joint effort between the public and private sectors, with the Government of Río Negro, through the Ministry of Economic Development and Productivity, playing a key role in the promotion and financial support for producers.
17 Apr 2025
Spain and China have signed a long-awaited protocol allowing Spanish cherries into the Chinese market. The deal could boost non-EU exports. FEPEX welcomes the move, highlighting the importance of diversifying markets for the fruit sector's growth.
27 Apr 2026
The Jerte Valley cherry harvest starts with 18,000–20,000 tons expected, high quality and European exports from May. Awaiting China market opening in a season marked by promotion, automation and unstable logistics costs affecting growers and supply chains.
27 Apr 2026
Tasmania closes the 2025/26 cherry season with export values nearing $50 million, driven by strong Asian demand and higher prices. Hong Kong, China, and Taiwan lead growth, reinforcing the premium positioning of Tasmanian cherries globally.
