新物种还是种下变异？西藏条纹Ptychanthus striatus var.motooensis var.nov.（马钱藻目：马钱藻科）一例

IF 0.8 4区生物学 Q4 PLANT SCIENCES

Bryologist Pub Date : 2021-10-21 DOI:10.1639/0007-2745-124.4.475

Zun Dai, S. Xing, S. Gradstein, Xing Chen, R. Zhu, Jian Wang

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引用次数: 0

摘要

摘要在西藏采集到一个不寻常的Ptychanthus属（Lejeuneaceae）标本，它不同于花被中常见的P.striatus，只有五个翼状龙骨（一个背侧、两个侧和两个腹侧），侧和腹侧龙骨比背侧更锋利。叶绿体和细胞核DNA序列的分子系统发育分析表明，该植物深深地嵌套在条纹藻中。由于花被结构的差异不能归因于可塑性，我们将该植物的系统发育位置解释为最近物种形成过程的结果，并将其描述为一个新变种，即P.striatus var.motoiensis。

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New species or infraspecific variation? A case study of Ptychanthus striatus var. motuoensis var. nov. (Marchantiophyta: Lejeuneaceae) from Xizang, China

Abstract. An unusual specimen of the genus Ptychanthus (Lejeuneaceae) was collected in Xizang, differing from the common P. striatus in the perianth, having only five, wing-like keels (one dorsal, two lateral and two ventral), the lateral and ventral keels being sharper than the dorsal one. Molecular-phylogenetic analysis of chloroplast and nuclear DNA sequences showed that the plant was deeply nested within P. striatus. As the differences in perianth structure could not be attributed to plasticity, we interpret the phylogenetic position of the plant as the result of a recent speciation process and describe it as a new variety, P. striatus var. motuoensis.

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来源期刊

Bryologist 生物-植物科学

CiteScore

2.40

自引率

11.10%

发文量

审稿时长

>12 weeks

期刊介绍： The Bryologist is an international journal devoted to all aspects of bryology and lichenology, and we welcome reviews, research papers and short communications from all members of American Bryological and Lichenological Society (ABLS). We also publish lists of current literature, book reviews and news items about members and event. All back issues of the journal are maintained electronically. The first issue of The Bryologist was published in 1898, with the formation of the Society. Author instructions are available from the journal website and the manuscript submission site, each of which is listed at the ABLS.org website. All submissions to the journal are subject to at least two peer reviews, and both the reviews and the identities of reviewers are treated confidentially. Reviewers are asked to acknowledge possible conflicts of interest and to provide strictly objective assessments of the suitability and scholarly merit of the submissions under review.