Genome-wide association analysis in tetraploid potato reveals four QTLs for protein content

Michiel T. Klaassen, Johan H. Willemsen, Peter G. Vos, Richard G.F. Visser, Herman J. van Eck, Chris Maliepaard, Luisa M. Trindade*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)


Valorisation of tuber protein is relevant for the potato starch industry to create added-value and reduce impact on the environment. Hence, protein content has emerged as a key quality trait for innovative potato breeders. In this study, we estimated trait heritability, explored the relationship between protein content and tuber under-water weight (UWW), inferred haplotypes underlying quantitative trait loci (QTLs) and pinpointed candidate genes. We used a panel of varieties (N = 277) that was genotyped using the SolSTW 20 K Infinium single-nucleotide polymorphism (SNP) marker array. Protein content data were collected from multiple environments and years. Our genome-wide association study (GWAS) identified QTLs on chromosomes 3, 5, 7 and 12. Alleles of StCDF1 (maturity) were associated with QTLs found on chromosome 5. The QTLs on chromosomes 7 and 12 are presented here for the first time, whereas those on chromosomes 3 and 5 co-localized with loci reported in earlier studies. The candidate genes underlying the QTLs proposed here are relevant for functional studies. This study provides resources for genomics-enabled breeding for protein content in potato.
Original languageEnglish
Article number151
JournalMolecular Breeding
Publication statusPublished - Nov 2019


  • Candidate genes
  • Genome-wide association analysis (GWAS)
  • Haplotypes
  • Potato
  • Protein content
  • Tetraploid


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