A global view of Gyroporus: molecular phylogenetics, diversity patterns, and new species
A global view of Gyroporus: molecular phylogenetics, diversity patterns, and new species
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DOI：
10.1080/00275514.2018.1511339
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发表时间：
2018-01-01
期刊：
影响因子：
2.8
通讯作者：
Hailing, Roy E.
中科院分区：
文献类型：
--
作者：
Davoodian, Naveed;Bergemann, Sarah E.;Hailing, Roy E.
Gyroporus（Gyroporaceae，Boletales）是一个非常多样化的多孔外生菌根真菌属，几乎在世界范围内分布。以前试图解开这个属内的多样性被证明是困难的，由于存在半隐种和模糊的结果，从核糖体RNA标记的分析。在这项研究中，我们采用相结合的形态分类学和系统发育的方法来界定物种和阐明地理和进化模式的Gyroporus。对于系统发育分析，蛋白质编码基因atp6（线粒体）三磷酸腺苷[ATP]合酶亚基6）和rpb 2（RNA聚合酶II的核第二大亚基）基于它们在牛肝菌目研究中的效用而被选择。我们推断几个不同的分支，最值得注意的是一个对应于G。castaneus作为一个特殊的北方半球类群，是另一个统一的G. cyanescens和类似实体，和第三组统一G. longicystidiatus和新大陆姊妹种。同样值得注意的是恢复的姐妹关系之间的cyanescens和longicystidiatus分支。我们正式描述了五个新种的Gyroporus，概述了一些临时种，并简要讨论了分布格局。这项研究为未来对这一众所周知但知之甚少的真菌属的研究提供了一个重要的框架。
Gyroporus (Gyroporaceae, Boletales) is a highly diverse genus of poroid ectomycorrhizal mushrooms with a nearly worldwide distribution. Previous attempts to unravel the diversity within this genus proved difficult due to the presence of semicryptic species and ambiguous results from analysis of ribosomal RNA markers. In this study, we employ a combined morphotaxonomic and phylogenetic approach to delimit species and elucidate geographic and evolutionary patterns in Gyroporus. For phylogenetic analyses, the protein-coding genes atp6 (mitochondria) adenosine triphosphate [ATP] synthase subunit 6) and rpb2 (nuclear second largest subunit of RNA polymerase II) were selected based on their utility in studies of Boletales. We infer several distinct clades, most notably one corresponding to G. castaneus as a speciose Northern Hemisphere group, another unifying G. cyanescens and like entities, and a third group unifying G. longicystidiatus and a New World sister species. Also notable is the recovery of a sister relationship between the cyanescens and longicystidiatus clades. We formally describe five new species of Gyroporus, outline a number of provisional species, and briefly discuss distributional patterns. This study provides an important scaffold for future work on this well-known but poorly understood genus of fungi.