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Theoretical and Applied Genetics

, Volume 83, Issue 8, pp 1044–1047 | Cite as

Eyespot resistance gene Pch-1 in H-93 wheat lines. Evidence of linkage to markers of chromosome group 7 and resolution from the endopeptidase locus Ep-D1b

  • M. Mena
  • G. Doussinault
  • I. Lopez-Braña
  • S. Aguaded
  • F. García-Olmedo
  • A. Delibes
Originals

Summary

Gene Pch1, which confers resistance to eyespot disease (Pseudocercosporella herpotrichoides Fron), has been located on chromosome 7D in the H-93 wheat-Aegilops ventricosa transfer lines using isozyme markers and DNA probes corresponding to group 7 chromosomes. Previous experiments had failed to ascertain this location. The lack of segregation of the resistance trait in progeny from reciprocal crosses between lines H-93-70 and VPM1 indicates that their respective resistance factors are allelic. Line H-93-51 carries the endopeptidase allele Ep-D1b but is susceptible to eyespot, which indicates that resistance to eyespot is not a product of the Ep-D locus, as had been proposed in a previous hypohesis.

Key words

Wheat Aegilops ventricosa Pseudocercosporella herpotrichoides Eyespot disease Resistance gene 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • M. Mena
    • 1
  • G. Doussinault
    • 2
  • I. Lopez-Braña
  • S. Aguaded
    • 1
  • F. García-Olmedo
    • 1
  • A. Delibes
    • 1
  1. 1.Bioquímica y Biología Molecular. E.T.S. Ingenieros Agrónomos. U.P.M.MadridSpain
  2. 2.Station d'amélioration des Plantes, INRALe RheuFrance

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