The virulence and avirulence genes in population of pathogen Puccinia coronata avenae | Geni virulentnosti i avirulentnosti u populaciji patogena Puccinia coronata avenae
2010
Staletic, M., Centar za strna zita d.o.o, Kragujevac (Serbia) | Milovanovic, M., Centar za strna zita d.o.o, Kragujevac (Serbia) | Djekic, V., Centar za strna zita d.o.o, Kragujevac (Serbia) | Perisic, V., Centar za strna zita d.o.o, Kragujevac (Serbia) | Djulakovic, V., Visoka tehnicka skola strukovnih studija, Pozarevac (Serbia)
Investigation were performed during 1999 and 2000 at the Centre of Small Grains in Kragujevac (Serbia). The samples of uredo-spores were collected from different oats cultivars in 23 locations of Serbia. In laboratory were obtained pure cultures, and by them was inoculated the set of isogenic lines. The virulence genes of Puccinia coronata avenae were identified on the basis of mutual relations of genes according to theory gene for gene. The existence of 23 different formulas of virulence was established. The number of virulence genes in identified patho-types was 2 to 12. The greatest number of patho-types had 5, 6, 7 and 8 virulence genes, until the total relation of virulent to a virulent genes was in accordance with theoretic relation 1:2. The most frequent were virulence genes V54-2, V64, V67, V61, V50-2, V62, V60 and V50, and the least frequent were V63, V58, V54-1, V59, V38, V48, V55, V56, V39 and V68. Obtained results point out that during 1999 and 2000 seasons, the genetic variability of virulence of Puccinia coronata avenae in Serbia was high, which demonstrates on necessity of search of new donors of Pc genes of resistance for theirs future usage in oat breeding for resistance to this pathogen.
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