Identification and mapping of the novel apple scab resistance gene Vd3

J.M. Soriano Soriano, S.G. Joshi, M.P.W. van Kaauwen, Y. Noordijk, R. Groenwold, G. Henken, W.E. van de Weg, H.J. Schouten

Research output: Contribution to journalArticleAcademicpeer-review

38 Citations (Scopus)

Abstract

Apple scab, caused by the fungal pathogen Venturia inaequalis, is one of the most devastating diseases for the apple growing in temperate zones with humid springs and summers. Breeding programs around the world have been able to identify several sources of resistance, the Vf from Malus floribunda 821 being the most frequently used. The appearance of two new races of V. inaequalis (races 6 and 7) in several European countries that are able to overcome the resistance of the Vf gene put in evidence the necessity of the combination of different resistance genes in the same genotype (pyramiding). Here, we report the identification and mapping of a new apple scab resistance gene (Vd3) from the resistant selection “1980-015-25” of the apple breeding program at Plant Research International, The Netherlands. This selection contains also the Vf gene and the novel V25 gene for apple scab resistance. We mapped Vd3 on linkage group 1, 1 cM to the south of Vf in repulsion phase to it. Based on pedigree analysis and resistance tests, it could be deduced that 1980-015-25 had inherited Vd3 from the founder “D3.” This gene provides resistance to the highly virulent EU-NL-24 strain of race 7 of V. inaequalis capable of overcoming the resistance from Vf and Vg.
Original languageEnglish
Pages (from-to)475-482
JournalTree Genetics and Genomes
Volume5
Issue number3
DOIs
Publication statusPublished - 2009

Keywords

  • x-domestica borkh.
  • venturia-inaequalis
  • microsatellite markers
  • technology dart
  • linkage maps
  • malus
  • vf
  • genome
  • region
  • r12740-7a

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