ABSTRACT Four ergot species (Claviceps ripicola, C. quebecensis, C. perihumidiphila, and C. occidentalis) were recognized based on analyses of DNA sequences from multiple loci, including two housekeeping genes, RNA polymerase II second largest subunit (RPB2), and translation elongation factor 1-α (TEF1-α), and a single-copy ergot alkaloid synthesis gene (easE) encoding chanoclavine I synthase oxidoreductase. Morphological features, ergot alkaloid production, and pathogenicity on five common cereal crops of each species were evaluated and presented in taxonomic descriptions. A synoptic key was also provided for identification.

中文翻译：

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加拿大麦角的四种系统发育种及其形态、生物碱产生和致病性特征

摘要 基于对来自多个位点的 DNA 序列的分析，包括两个看家基因、RNA 聚合酶 II 第二大亚基 (RPB2) 和翻译，识别了四种麦角物种（Claviceps ripicola、C.延伸因子 1-α (TEF1-α) 和编码 chanoclavine I 合酶氧化还原酶的单拷贝麦角生物碱合成基因 (easE)。对每个物种的五种常见谷类作物的形态特征、麦角生物碱产量和致病性进行了评估，并在分类描述中进行了介绍。还提供了一个概要键用于识别。