Hort. Sci. (Prague), X:X | DOI: 10.17221/196/2024-HORTSCI
Development of a hybrid apple population: MAS-based testing for Vf gene detection and preliminary field evaluation of its scab resistanceOriginal Paper
- 1 Fruit Research and Development Station Bistrița, Bistrița, Romania
- Faculty of Horticulture and Business in Rural Development, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Cluj-Napoca, Romania 0362
- $2
The apple scab, caused by Venturia inaequalis, is one of the most devastating diseases of apples because it drastically affects the aerial parts of the tree. Apple breeding programs frequently aim to develop cultivars exhibiting resistance to scab. Thus, controlled pollinations were performed on apple trees in 2021. The experiment was organised into a hybridisation scheme involving six apple cultivars. The scheme consists of: five female genitors (‘Auriu de Bistrița’, ‘Jonathan’, ‘Golden Delicious’, ‘Starkrimson’, and ‘Idared’) and one male genitor (‘Florina’ – donor for the Vf). To quickly identify the Vf gene in the early development stage of progenies, three pairs of primers were used: AM19, AL07, and VFC. The hybrid combinations with the highest percentage of progenies inheriting the Vf resistance gene were: ‘Starkrimson’ × ‘Florina’ (59.2%), followed by ‘Jonathan’ × ‘Florina’ (57.1%). The hybrids that inherited the Vf resistance gene have been transferred to the field and are being further examined for their resistance against scab infections in the field, in the proximity of a natural source of the inoculum infection pressure.
Keywords: marker-assisted selection; molecular markers; monogenic resistance; Rvi6 gene; Venturia inaequalis
Received: October 22, 2024; Revised: May 23, 2025; Accepted: August 12, 2025; Prepublished online: March 5, 2026
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