北陸病害虫研究会報

バッカクキンの寄生性推定のための分子系統解析

田中栄爾

石川県立大学生物資源科学部環境科学科

Eiji Tanaka
Department of Environmental Science and Engineering, Ishikawa Prefectural University 1-308 Suematsu, Nonoichi, Ishikawa 921-8836: Molecular phylogenetic analysis of ergot fungi to presume the parasitic characteristics

To presume the parasitic characteristics of ergot fungi (Claviceps spp.) on crops, molecular phylogenetic analysis approach was used to associate with previous parasitic tests. Ergot fungi found on Agrostis gigantea, Alopecurus aequalis var. amurensis and Polypogon fugax in Ishikawa prefecture were morphologically identified as C. purpurea var. alopecuri. Phylogenetic analysis of Claviceps spp. using the ITS1-5.8S rDNA-ITS2 region revealed that C. purpurea was divided into at least two groups. These phylogenetic groups were considered to be populations with different host plant preferences. Consequently, the phylogenetic group that included C. purpurea var. alopecuri was regarded as the polulation that preferred barley and wheat as host plants.

Key words：麦角病, 種内変異, 寄主選好性, 寄生性, Claviceps panicoidearum，host preference