Genetical dissection of H3-mediated polygenic PCN resistance in a heterozygous autotetraploid potato population

Glenn J. Bryan (Lead / Corresponding author), Karen McLean, Barnaly Pande, Andy Purvis, Christine A. Hackett, John E. Bradshaw, Robbie Waugh

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Potato Cyst Nematodes (PCN) currently represent a serious threat to potato cultivation. However, many sources of resistance are known amongst primitive and wild relatives of cultivated potato, Solanum tuberosum ssp. tuberosum. Currently, in the UK, the major threat is due to Globodera pallida, resistance to which has not yet been effectively deployed in potato cultivars. We have performed linkage and QTL analysis of a tetraploid potato population segregating for the 'H3' source of resistance to G. pallida that was introgressed into cultivated potato from the primitive species, Solanum tuberosum ssp. andigena. This source is highly effective against the most common UK pathotype of G. pallida (Pa2/3) and its deployment in breeding material is a major goal. We adopted an approach involving bulked segregant analysis (BSA) as well as genome wide linkage analysis using AFLP and SSR markers. BSA provided a concentration of markers linked in coupling to a QTL on linkage group IV, and improved the accuracy of the QTL localisation. By performing an analysis on residual scores after removal of the effects due to the major QTL, we detected a second QTL on linkage group XI.

Original languageEnglish
Pages (from-to)105-116
Number of pages12
JournalMolecular Breeding
Volume14
Issue number2
DOIs
Publication statusPublished - 1 Sep 2004

Keywords

  • Bulked segregant analysis
  • Nematodes
  • PCN
  • Potato
  • Quantitative resistance
  • Tetraploid

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