New insights into the phylogeny and taxonomy of Chinese Physospermopsis (Apiaceae)

(Apiaceae) comprises about 10 species, but its taxonomy and phylogeny are disputed. The genus is mostly distributed in the Himalayas and Hengduan Mountains at high elevation. Earlier molecular studies involving six species of indicated that this genus is not monophyletic and is nested in the East As...

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Bibliographic Details
Published in:PhytoKeys 2021-03, Vol.175 (6), p.67-88
Main Authors: Xu, Xin-Rui, Guo, Xian-Lin, Price, Megan, He, Xing-Jin, Zhou, Song-Dong
Format: Article
Language:English
Subjects:
Analysis
Apiaceae
Asia
Botany
Cenozoic
Identification and classification
Molecular Systematics
Morphology
Phylogeny
Taxonomy
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Summary:(Apiaceae) comprises about 10 species, but its taxonomy and phylogeny are disputed. The genus is mostly distributed in the Himalayas and Hengduan Mountains at high elevation. Earlier molecular studies involving six species of indicated that this genus is not monophyletic and is nested in the East Asia Clade. Therefore, the aims of this study were to re-assess the phylogenetic position of, and interspecific relationships within, based on two chloroplast loci ( , ) and one nuclear region, the internal transcribed spacers of ribosomal DNA (ITS). Eight species involving 13 populations of were collected. These were sequenced and analyzed with the sequences of 31 other Apiaceae species obtained from the NCBI to determine phylogenetic relationships using Bayesian inference (BI) and Maximum likelihood (ML). Our study found that is monophyletic, nested in Pleurospermeae of Apiaceae, sister to . And we propose that the clade should be replaced by the East Asia Clade. However, the interspecific relationships within were not well resolved and the positioning of species was unclear. Diagnostic characteristics to distinguish species in the field and laboratory are provided for future phylogenetic studies.
ISSN:1314-2011
1314-2003
DOI:10.3897/phytokeys.175.57681