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Theoretical and Applied Genetics

, Volume 100, Issue 3–4, pp 419–431 | Cite as

Genetic analysis of durable leaf rust resistance in winter wheat

  • M. M. Messmer
  • R. Seyfarth
  • M. Keller
  • G. Schachermayr
  • M. Winzeler
  • S. Zanetti
  • C. Feuillet
  • B. Keller
Original Article

Abstract 

Quantitative resistance that delays the epidemic development of leaf rust in wheat is an important source for durable resistance breeding. The Swiss winter wheat variety ’Forno’ shows a high level of quantitative resistance against leaf rust. This resistance has been effective for more than 10 years and can therefore be considered to be durable. In order to map quantitative trait loci (QTL) for durable leaf rust resistance we analysed 204 F5 recombinant inbred lines (RILs) of the cross between the winter wheat ’Forno’ and the winter spelt ’Oberkulmer’ for their level of leaf rust resistance (LR) and leaf tip necrosis (LTN) in four different environments. Both traits showed a continuous distribution and were significantly correlated (r=−0.5). Across environments we detected 8 QTL for leaf rust resistance (6 inherited from ’Forno’) and 10 QTL for the quantitative expression of LTN (6 inherited from ’Forno’). Of the 6 QTL responsible for the durable leaf rust resistance of ’Forno’, 1 major QTL coincided with a thaumatin locus on 7BL explaining 35% of the phenotypic variance. Four QTL for LR coincided with QTL for LTN. At these loci the alleles of ’Forno’ increased the level of resistance as well as the extent of LTN, indicating pleiotropy.

Key words Triticum aestivum QTL Leaf rust Durable resistance Leaf-tip necrosis 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • M. M. Messmer
    • 1
  • R. Seyfarth
    • 2
  • M. Keller
    • 1
  • G. Schachermayr
    • 1
  • M. Winzeler
    • 1
  • S. Zanetti
    • 1
  • C. Feuillet
    • 2
  • B. Keller
    • 2
  1. 1.Swiss Federal Research Station for Agroecology and Agriculture (FAL) Zürich-Reckenholz, Reckenholzstr. 191, CH-8046 Zürich, SwitzerlandCH
  2. 2.Institute of Plant Biology, University of Zürich, Zollikerstr. 107, CH-8008 Zürich, Switzerland e-mail: bkeller@botinst.unizh.ch Fax: +41-1-634 82 04CH

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