Yellow rust (Puccinia striiformis Westend.), which rarely occurs in Hungary, caused serious yield losses in wheat (Triticum aestivum L.) in various parts of the country in 2001. This severe natural infection was exploited to test the degree of infection of 19 Martonvásár-bred winter wheats at two locations and of a further 27 winter bread wheat and 7 winter durum wheat genotypes at a single location (giving a total of 45 varieties and 8 lines). A substantial proportion of the Martonvásár varieties were resistant (62.2%) or moderately resistant (15.1%) to yellow rust. Among the winter bread wheat varieties, Mv Madrigál and Mv Patolás were exceptionally resistant. No uredo colonies at all could be observed on the winter durum wheat variety Mv Makaróni. Among the breeding lines whose pedigrees suggested that they might carry the Yr17 resistance gene, the presence of the SCAR marker for the gene was proved in six cases by molecular analysis. These lines exhibited only traces of infection, if any, in Martonvásár in 2001. The rare appearance of the pathogen and the consequent lack of natural infection prevents continuous field selection for yellow rust resistance from being carried out, so molecular marker-assisted selection is of prime importance in the control of the disease.
|Translated title of the contribution||Yellow rust resistance of winter wheat varieties and lines and the identification of the Yr17 resistance gene using molecular markers|
|Number of pages||10|
|Publication status||Published - Jun 1 2003|
ASJC Scopus subject areas
- Agronomy and Crop Science