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
    • New Zealand Institute for Crop and Food Research Limited
  • A. M. Hill
    • New Zealand Institute for Crop and Food Research Limited
  • M. Michel
    • Bundesanstalt für Züchtungsforschung an Kulturpflanzen, Institut für Züchtungsmethodik landwirtschaftlicher Kulturpflanzen
  • G. M. Timmerman-Vaughan
    • New Zealand Institute for Crop and Food Research Limited

DOI: 10.1007/BF00220943

Cite this article as:
Pickering, R.A., Hill, A.M., Michel, M. et al. Theoret. Appl. Genetics (1995) 91: 1288. doi:10.1007/BF00220943


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 vulgareHordeum bulbosumPowdery mildew resistanceGene introgressionIrradiation
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© Springer-Verlag 1995