Advertisement

Theoretical and Applied Genetics

, Volume 97, Issue 5–6, pp 834–846 | Cite as

Analysis of quantitative trait loci (QTLs) and quantitative trait alleles (QTAs) for potato tuber yield and starch content

  • R. Schäfer-Pregl
  • E. Ritter
  • L. Concilio
  • J. Hesselbach
  • L. Lovatti
  • B. Walkemeier
  • H. Thelen
  • F. Salamini
  • C. Gebhardt

Abstract

 Using RFLP markers, QTLs for tuber starch-content and tuber yield were mapped in two F1 populations derived from crossing non-inbred di-haploid potato breeding lines. QTLs were identified and mapped, based on both single-marker tests and interval analyses. A model specifically developed for interval QTL analysis in non-inbred plant species was successfully applied for the first time to experimental data. Results of both methods of QTL analysis were similar but not identical. QTLs for tuber starch-content and tuber yield were analysed in segregating populations K31 and LH in five and two environments, respectively. Population K31 was fully genotyped whereas population LH was selectively genotyped according to high and low tuber-starch content. Eighteen putative QTLs for tuber starch-content were identified on all 12 potato linkage groups and eight putative QTLs for tuber yield were identified on eight linkage groups. Twenty of twenty six putative QTLs were reproducibly detected in at least two environments and/or mapping populations. Few major QTLs for tuber starch-content were highly stable across environments but were detected in only one of the two mapping populations analysed. Most QTLs for tuber yield were linked with QTLs for tuber starch-content suggesting that the effects on both traits are controlled by the same genetic factors. The results are discussed with respect to marker-assisted selection in potato.

Key words Potato QTL Tuber starch-content Tuber yield Market-assisted selection 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • R. Schäfer-Pregl
    • 1
  • E. Ritter
    • 2
  • L. Concilio
    • 3
  • J. Hesselbach
    • 1
  • L. Lovatti
    • 3
  • B. Walkemeier
    • 1
  • H. Thelen
    • 1
  • F. Salamini
    • 1
  • C. Gebhardt
    • 1
  1. 1.Max-Planck Institut für Züchtungsforschung, Carl von Linne Weg 10, D-50829 Köln, Germany Tel.: +49 (0) 221 5062 430 Fax: +49 (0) 221 5062 413 E-mail: gebhardt@mpiz-koeln.mpg.deDE
  2. 2.Centro de Investigacion y Mejora Agraria (CIMA), Granja Modelo de Arkaute (Alava), E-01080 Vitoria-Gasteiz, SpainES
  3. 3.Consorzio “Mario Neri”, Via Emilia Levante 18, 40026 Imola (BO), ItalyIT

Personalised recommendations