Exploring intra-varietal variation for complex traits in grapevine (Vitis vinifera L.)

作者：Hannah Robinson, Timo Strack, Maximilian Heinrich-Wilhelm Schmidt, Paolo Callipo, Mariem Nsibi, Joachim Schmid, Ernst Rühl, Hans‐Peter Piepho, Kai P. Voss‐Fels · 发表于：Theoretical and Applied Genetics · 年份：2025 · DOI：10.1007/s00122-025-05088-3 · 被引用次数：4 · 研究领域：Genetic and phenotypic traits in livestock、Horticultural and Viticultural Research、Genetics and Plant Breeding

KEY MESSAGE: Centuries of clonal propagation have shaped remarkable intra-varietal genetic diversity in grapevine, offering valuable opportunities to dissect complex traits and accelerate genetic improvement while safeguarding varietal integrity. Climate change poses significant challenges to global grapevine (Vitis vinifera L.) production, highlighting the urgent need for adaptive breeding strategies to accelerate genetic improvement. While clonal propagation preserves varietal identity and heterozygosity, it also limits the rate of genetic gain due to prolonged breeding cycles. This study assessed phenotypic and genetic variation within eight clonal populations of key grapevine varieties (Pinot Blanc, Pinot Gris, Pinot Noir, Pinot Noir Précoce, Riesling, Müller-Thurgau, Auxerrois, and Savagnin Rose) using 14 years of data collected in Germany across six agronomic, quality, and disease-related traits. Estimates of broad-sense heritability, genetic correlations, and key variance components were derived using linear mixed models. Substantial intra-varietal phenotypic variation was observed across all traits, with moderate to high heritability estimates, confirming that a meaningful proportion of the phenotypic variation can be attributed to the genetic differences among clones. Substantial year and year-by-field variance and interaction components were found to contribute to the total phenotypic variance for most traits, aligning with previous reports of substantial genotype-b...