Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Phytopathology. 2012 Oct;102(10):1006-12. doi: 10.1094/PHYTO-03-12-0041-R.
Puccinia graminis, the causal agent of stem rust, was collected from its alternate host barberry (Berberis spp.) and two different uredinial hosts, oats (Avena sativa) and rye (Secale cereale). The samples were analyzed using 11 polymorphic simple sequence repeat (SSR) markers. There were large differences between fungal populations on oats (P. graminis f. sp. avenae) and rye (P. graminis f. sp. secalis), and the genetic variation within the different formae speciales was also high. It was possible to distinguish between the two formae speciales on barberry. Additional genotypic groups not present in the field samples from oats and rye were also identified on barberry. Our results confirm the importance of barberry in maintaining the populations of P. graminis in Sweden and the importance of the sexual stage for the survival of the pathogen.
叶锈菌，引起条锈病的病原菌，从其转主寄主小檗（Berberis spp.）和两种不同的担孢子寄主燕麦（Avena sativa）和黑麦（Secale cereale）中采集。使用 11 个多态性简单序列重复（SSR）标记对样品进行了分析。燕麦上的真菌种群（叶锈菌 f. sp. avenae）和黑麦上的真菌种群（叶锈菌 f. sp. secalis）之间存在很大差异，不同专化型内的遗传变异也很高。可以在小檗上区分这两个专化型。在燕麦和黑麦的田间样本中未发现的其他基因型群体也在小檗上被鉴定出来。我们的结果证实了小檗在维持瑞典叶锈菌种群中的重要性，以及有性阶段对病原菌生存的重要性。
