Inheritance of Calyx Abscission in Apple: A Trait with Potential Impact on Fruit Rot Susceptibility.

ABSTRACT: Fruit rots, both pre- and postharvest, represent a major problem in apple production, leading to significant yield losses each year. In this study, the inheritance of calyx abscission, a trait that could potentially reduce susceptibility to various fruit rots, was investigated in an F₁ population. Calyx persistence rates were phenotyped in the field in 2023 and 2025 on 122 offspring derived from a cross between 'Idared' and Malus baccata 'Jackii', the latter exhibiting complete calyx abscission. QTL analyses were conducted using genotypic data and a genetic linkage map generated in a previous study. Results show, for the first time in apple, that calyx abscission is a heritable trait influenced by multiple loci, with the strongest effects detected on linkage groups 5 and

SUBMITTER: Pfeifer M 

PROVIDER: S-EPMC12694397 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature