Theoretical and Applied Genetics

, Volume 91, Issue 8, pp 1288–1292

The transfer of a powdery mildew resistance gene from Hordeum bulbosum L to barley (H. vulgare L.) chromosome 2 (2I)

  • R. A. Pickering
  • A. M. Hill
  • M. Michel
  • G. M. Timmerman-Vaughan
Article
  • 126 Downloads

Abstract

Hordeum bulbosum L. is a source of disease resistance genes that would be worthwhile transferring to barley (H. vulgare L.). To achieve this objective, selfed seed from a tetraploid H. vulgare x H. bulbosum hybrid was irradiated. Subsequently, a powdery mildew-resistant selection of barley phenotype (81882/83) was identified among field-grown progeny. Using molecular analyses, we have established that the H. bulbosum DNA containing the powdery mildew resistance gene had been introgressed into 81882/83 and is located on chromosome 2 (2I). Resistant plants have been backcrossed to barley to remove the adverse effects of a linked factor conditioning triploid seed formation, but there remains an association between powdery mildew resistance and non-pathogenic necrotic leaf blotching. The dominant resistance gene is allelic to a gene transferred from H. bulbosum by co-workers in Germany, but non-allelic to all other known powdery mildew resistance genes in barley. We propose Mlhb as a gene symbol for this resistance.

Key words

Hordeum vulgare Hordeum bulbosum Powdery mildew resistance Gene introgression Irradiation 

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • R. A. Pickering
    • 1
  • A. M. Hill
    • 1
  • M. Michel
    • 2
  • G. M. Timmerman-Vaughan
    • 1
  1. 1.New Zealand Institute for Crop and Food Research LimitedChristchurchNew Zealand
  2. 2.Bundesanstalt für Züchtungsforschung an Kulturpflanzen, Institut für Züchtungsmethodik landwirtschaftlicher KulturpflanzenGroß LüsewitzGermany

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