Abstract

Puccinia graminis is the causal agent of stem rust on cereals, a disease that have been known and feared for centuries. In Sweden, a law of removal of the alternate host barberry was implemented until 1994. Since then, the occurrence of barberry has increased, as well as the stem rust disease. Our studies shows that barberry is an important part of the disease cycle in Sweden and the genetic variation of the pathogen is high, both within and between infested fields. Until now, only oats and rye as well as some wild grasses are infected by P. graminis in Sweden. In addition, we found a clear genetical and morphological differentiation between stem rust infecting rye and oats respectively. Why wheat is not affected remains as a question to be answered, since most of the Swedish wheat cultivars are susceptible to P. graminis f. sp. tritici, the stem rust infecting wheat.

Published in

Publisher: Borlaug Global Rust Initiative

SLU Authors

• Berlin, Anna

  • Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Agricultural Science


Permanent link to this page (URI)

https://res.slu.se/id/publ/53533