Further insights into the phylogeny of facultative parasitic ciliates associated with tetrahymenosis (Ciliophora, Oligohymenophorea) based on multigene data.
Further insights into the phylogeny of facultative parasitic ciliates associated with tetrahymenosis (Ciliophora, Oligohymenophorea) based on multigene data.
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DOI：
10.1002/ece3.10504
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发表时间：
2023-09
影响因子：
2.6
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中科院分区：
文献类型：
--
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四膜虫病由约 10 种四膜虫物种引起，是一个新出现的问题，给全世界水产养殖业造成了重大经济损失。然而，在四膜虫目中，类群之间存在许多未解决的进化关系。在这里，我们报告了 21 个新序列，包括 SSU-rRNA、ITS1-5.8S-ITS2 rRNA 和 LSU-rRNA，以及与四膜虫病相关的 10 种兼性寄生四膜虫的基因，并基于每个单独的基因和三基因串联数据集进行系统发育分析。主要发现是：（1）所有寄生和兼性寄生物种都聚集在borealis组中。 (2)随着新序列的增加，四膜虫仍分为三个类群，即“borealis组”、“australis组”和“paravorax组”。 （3）所有新测序的兼性寄生四膜虫物种的聚类模式表明，“borealis”组的成员可能更容易受到寄生的影响。 (4)基于连锁基因的系统发育表明T. pyriformis、T. setosa和T. leucophrys有密切的亲缘关系。 (1)所有寄生和兼性寄生物种都聚集在borealis组中。 (2)随着新序列的增加，四膜虫仍分为三个类群，即“borealis组”、“australis组”和“paravorax组”。 （3）所有新测序的兼性寄生四膜虫物种的聚类模式表明，“borealis”组的成员可能更容易受到寄生的影响。 (4)基于连锁基因的系统发育表明T. pyriformis、T. setosa和T. leucophrys有密切的亲缘关系。
Tetrahymenosis, caused by about 10 Tetrahymena species, is an emerging problem inflicting a significant economic loss on the aquaculture industry worldwide. However, in the order Tetrahymenida, there are many unresolved evolutionary relationships among taxa. Here we report 21 new sequences, including SSU‐rRNA, ITS1‐5.8S‐ITS2 rRNA and LSU‐rRNA, genes of 10 facultative parasitic Tetrahymena associated with tetrahymenosis, and conduct phylogenetic analyses based on each individual gene and a three‐gene concatenated dataset. The main findings are: (1) All the parasitic and facultative parasitic species cluster in borealis group. (2) With the addition of new sequences, Tetrahymena is still divided into three groups, namely the “borealis group”, the “australis group,” and the “paravorax group.” (3) the cluster pattern of all the newly sequenced facultative parasitic Tetrahymena species shows that members of the “borealis” group may be more susceptible to parasitism. (4) phylogeny based on concatenated genes show that T. pyriformis, T. setosa, and T. leucophrys have close relationship. (1) All the parasitic and facultative parasitic species cluster in borealis group. (2) With the addition of new sequences, Tetrahymena is still divided into three groups, namely the “borealis group,” the “australis group,” and the “paravorax group.” (3) the cluster pattern of all the newly sequenced facultative parasitic Tetrahymena species shows that members of the “borealis” group may be more susceptible to parasitism. (4) phylogeny based on concatenated genes show that T. pyriformis, T. setosa, and T. leucophrys have close relationship.
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