蓝藻属的种划分。

IF 3.4 Q1 Agricultural and Biological Sciences
Alica Košuthová, Johannes Bergsten, Martin Westberg, Mats Wedin
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引用次数: 10

摘要

背景:在这项研究中,我们调查了蓝藻地衣属Rostania (Collemataceae, Peltigerales, Lecanoromycetes)的物种限制。对4个分子标记(mtSSU rDNA、β-微管蛋白、MCM7、RPB2)进行了测序和分析,采用两种基于聚结的物种划分方法:广义混合Yule聚结模型(GMYC)和基于多物种聚结模型(MSC)的贝叶斯物种划分方法(BPP),后者有或没有先验定义的指导树。结果:物种划分分析表明存在8种强烈支持的候选物种。其中6个品种的形态/生态性状与遗传分界具有决定性的相关性。在两个额外的候选物种中,一个是由单个无菌标本代表的,另一个目前缺乏形态学或生态学的支持证据。结论:Rostania至少包括6种:ceranisca、multipunctata r、occultta r 1、occultta r 2、occultta r 3和occultta r 4、5、6。Rostania中存在三种不同的念珠菌形态,并且这些形态与Rostania菌体形态有很大的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Species delimitation in the cyanolichen genus Rostania.

Species delimitation in the cyanolichen genus Rostania.

Species delimitation in the cyanolichen genus Rostania.

Species delimitation in the cyanolichen genus Rostania.

Background: In this study, we investigate species limits in the cyanobacterial lichen genus Rostania (Collemataceae, Peltigerales, Lecanoromycetes). Four molecular markers (mtSSU rDNA, β-tubulin, MCM7, RPB2) were sequenced and analysed with two coalescent-based species delimitation methods: the Generalized Mixed Yule Coalescent model (GMYC) and a Bayesian species delimitation method (BPP) using a multispecies coalescence model (MSC), the latter with or without an a priori defined guide tree.

Results: Species delimitation analyses indicate the presence of eight strongly supported candidate species. Conclusive correlation between morphological/ecological characters and genetic delimitation could be found for six of these. Of the two additional candidate species, one is represented by a single sterile specimen and the other currently lacks morphological or ecological supporting evidence.

Conclusions: We conclude that Rostania includes a minimum of six species: R. ceranisca, R. multipunctata, R. occultata 1, R. occultata 2, R. occultata 3, and R. occultata 4,5,6. Three distinct Nostoc morphotypes occur in Rostania, and there is substantial correlation between these morphotypes and Rostania thallus morphology.

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来源期刊
BMC Evolutionary Biology
BMC Evolutionary Biology 生物-进化生物学
CiteScore
5.80
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: BMC Evolutionary Biology is an open access, peer-reviewed journal that considers articles on all aspects of molecular and non-molecular evolution of all organisms, as well as phylogenetics and palaeontology.
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