Identification of agronomically important QTL in tetraploid potato cultivars using a marker-trait association analysis

B.B. D'hoop, L.C.P. Keizer, M.J. Paulo, R.G.F. Visser, F.A. van Eeuwijk, H.J. van Eck

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Two association mapping panels were analysed for marker–trait associations to identify quantitative trait loci (QTL). The first panel comprised 205 historical and contemporary tetraploid potato cultivars that were phenotyped in field trials at two locations with two replicates (the academic panel). The second panel consisted of 299 potato cultivars and included recent breeds obtained from five Dutch potato breeding companies and reference cultivars (the industrial panel). Phenotypic data for the second panel were collected during subsequent clonal selection generations at the individual breeding companies. QTL were identified for 19 agro-morphological and quality traits. Two association mapping models were used: a baseline model without, and a more advanced model with correction for population structure and genetic relatedness. Correction for population structure and genetic relatedness was performed with a kinship matrix estimated from marker information. The detected QTL partly not only confirmed previous studies, e.g. for tuber shape and frying colour, but also new QTL were found like for after baking darkening and enzymatic browning. Pleiotropic effects could be discerned for several QTL.
Original languageEnglish
Pages (from-to)731-748
JournalTheoretical and Applied Genetics
Volume127
Issue number3
DOIs
Publication statusPublished - 2014

Keywords

  • tuberosum subsp tuberosum
  • late blight resistance
  • foliage maturity type
  • beta-vulgaris l.
  • linkage disequilibrium
  • solanum-tuberosum
  • diploid potato
  • population-structure
  • quality traits
  • candidate genes

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