当前位置: X-MOL 学术bioRxiv. Evol. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
DNA, Morphology, and Ecology Resurrect Previously Synonymized Species of North American Stereum and Suggest Extensive Undescribed Global Diversity
bioRxiv - Evolutionary Biology Pub Date : 2022-02-28 , DOI: 10.1101/2020.10.16.342840
Sarah DeLong-Duhon , Robin K. Bagley

Stereum is an exceedingly common but taxonomically confounding genus of basidiomycete fungus with a cosmopolitan distribution. Lack of consensus about morphological and geographic boundaries of many Stereum species has resulted in a lack of consistency in identification of physical specimens, a problem that cascades to their associated published DNA sequences. A critical initial step towards addressing these issues is determining the scope of the problem. Here, we first use integrative taxonomy to delimit species in the North American Stereum ostrea complex. We use morphological and ecological characters, alongside ITS rDNA sequences of specimens from midwestern and eastern North America to show that “Stereum ostrea” in this region is a complex of at least three reproductively isolated sister species: S. lobatum, S. fasciatum, and S. subtomentosum. We then extend lessons from this case study to a set of publicly available Stereum ITS sequences to assess the accuracy of species names represented by existing sequence data. ASAP species delimitation successfully discriminates among the three newly revealed species in the S. ostrea species complex, but also reveals considerable cryptic diversity across global Stereum and widespread inconsistency in application of species names. Though ITS alone should not be used to delimit species or describe evolutionary relationships, its application here helps direct new hypotheses and suggests several areas of Stereum taxonomy that require revision. The critical future work of disentangling Stereum taxonomy and evolution should combine a multilocus genetic approach with morphology, ecology, and a global sampling strategy.

中文翻译:

DNA、形态学和生态学复活了以前同义的北美立体物种,并暗示了广泛的未描述的全球多样性

Stereum是一种非常常见但在分类学上令人困惑的担子菌属,具有世界性分布。许多立体动物物种的形态和地理边界缺乏共识导致物理标本鉴定缺乏一致性,这一问题与相关的已发表 DNA 序列有关。解决这些问题的关键第一步是确定问题的范围。在这里,我们首先使用综合分类法来划分北美Stereum ostrea复合体中的物种。我们使用形态学和生态学特征,以及来自北美中西部和东部的标本的 ITS rDNA 序列来表明“牡蛎牡蛎”在该地区是至少三个生殖分离的姐妹物种的复合体:S. lobatumS. fasciatumS. subtomentosum。然后,我们将此案例研究的经验扩展到一组公开可用的Stereum ITS 序列,以评估现有序列数据所代表的物种名称的准确性。ASAP 物种划界成功区分了S. ostrea物种复合体中的三个新发现的物种,但也揭示了全球Stereum中相当大的神秘多样性物种名称的应用普遍不一致。尽管 ITS 不应该单独用于划定物种或描述进化关系,但它在这里的应用有助于指导新的假设,并提出了需要修订的立体分类学的几个领域。解开立体分类学和进化的关键未来工作应该将多位点遗传方法与形态学、生态学和全球采样策略相结合。
更新日期:2022-02-28
down
wechat
bug