Colletotrichum species form one of the most economically significant groups of pathogenic fungi and lead to significant losses in the production of major crops—in particular, fruits, vegetables, ornamental plants, shrubs, and trees. Members of the genus Colletotrichum cause anthracnose disease in many plants. Due to their considerable variation, these fungi have been widely investigated in genetic studies as model organisms. Here, we report the complete mitochondrial genome sequences of four Colletotrichum species (C. fioriniae, C. lupini, C. salicis, and C. tamarilloi). The reported circular mitogenomes range from 30,020 (C. fioriniae) to 36,554 bp (C. lupini) in size and have identical sets of genes, including 15 protein-coding genes, two ribosomal RNA genes, and 29 tRNA genes. All four mitogenomes are characterized by a rather poor repetitive sequence content with only forward repeat representatives and a low number of microsatellites. The topology of the phylogenetic tree reflects the systematic positions of the studied species, with representatives of each Colletotrichum species complex gathered in one clade. A comparative analysis reveals consistency in the gene composition and order of Colletotrichum mitogenomes, although some highly divergent regions are also identified, like the rps3 gene which appears as a source of potential diagnostic markers for all studied Colletotrichum species.

中文翻译：

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rps3 作为候选线粒体基因，用于尖头炭疽菌物种复合体物种的分子鉴定

炭疽菌属是最具经济意义的病原真菌类群之一，导致主要作物（特别是水果、蔬菜、观赏植物、灌木和树木）的生产遭受重大损失。炭疽菌属的成员在许多植物中引起炭疽病。由于其相当大的变异，这些真菌已作为模式生物在遗传学研究中得到广泛研究。在这里，我们报告了四种炭疽菌属物种（C. fioriniae、C. lupini、C. salicis 和 C. tamarilloi）的完整线粒体基因组序列。报道的环状有丝分裂基因组的大小范围从 30,020 (C. fioriniae) 到 36,554 bp (C. lupini)，并且具有相同的基因组，包括 15 个蛋白质编码基因、2 个核糖体 RNA 基因和 29 个 tRNA 基因。所有四种有丝分裂基因组的特点是重复序列含量相当差，只有正向重复代表和少量的微卫星。系统发育树的拓扑反映了所研究物种的系统位置，每个炭疽菌物种复合体的代表聚集在一个进化枝中。比较分析揭示了炭疽菌丝裂基因组的基因组成和顺序的一致性，尽管也鉴定了一些高度分歧的区域，例如rps3基因，它似乎是所有研究的炭疽菌物种的潜在诊断标记物的来源。