Saturation mapping of the apple scab resistance gene Vf using AFLP markers

M. L. Xu, S. S. Korban

Research output: Contribution to journalArticlepeer-review

Abstract

Using the amplified fragment length polymorphism (AFLP) technique combined with a 'narrow-down' bulk segregant strategy enabled us to quickly identify 15 tightly linked AFLP markers to the Vf gene that confers resistance to the apple scab disease. High-resolution mapping placed all 15 AFLP markers within an interval of 0.6 cM around the Vf region; 7 of them were found to be inseparable from the Vf gene, 1 was localized left of, and the remaining 7 located right of the Vf gene. In addition, eight previously identified RAPD markers were also mapped, but only three, including M18, AM19, and AL07, were localized within this short interval, and none co-segregated with the Vf gene. The saturation of the Vf region with AFLP markers will accelerate both marker-assisted selection and map-based cloning. The advantages of this 'narrow-down' strategy, estimation of physical distances among AFLP markers, and their potential application are also discussed.

Original languageEnglish (US)
Pages (from-to)844-851
Number of pages8
JournalTheoretical and Applied Genetics
Volume101
Issue number5-6
DOIs
StatePublished - 2000

Keywords

  • AFLP marker
  • Apple
  • Mapping
  • Scab resistance
  • Vf gene

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Genetics

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