首页|Species boundaries and conservation implications of Cinnamomum japonicum,an endangered plant in China

Species boundaries and conservation implications of Cinnamomum japonicum,an endangered plant in China

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Clear species boundaries are crucial for plans and actions on biodiversity conservation.However,morphological similarities among allied species can result in taxonomic difficulties,thus impeding conservation efforts.In China,Cinnamomum japonicum Siebold is a well-known endangered plant,yet suffers from longstanding taxonomic issues.Here,we explicitly evaluate whether C.japonicum,C.chenii,and C.chekiangense are the same phylogenetic species on the basis of a multi-individual sampling strategy.We identified three sets of low-copy orthologous genes from 19 Lauraceae taxa for phylogenetic inferences.Both the concatenation and coalescent-based phylogenies supported that C.chenii individuals were embedded in the C.japonicum clade,indicating these two taxa are conspecific.Meanwhile,C.chekiangense accessions formed a monophyly which was not sister to C.japonicum.This result,together with the morphological differences that the leaves of C.japonicum are glabrous with a faveolate pattern of venation while those of C.chekiangense have trichomes and inevident lateral veins,led us to consider both as two distinct species.Based on 17 728 neutral single nucleotide polymorphisms(SNPs),the ADMIXTURE analysis suggested that the Chinese C.japonicum populations in Zhoushan Archipelago(=C.chenii)were genetically differentiated from the Japanese and Korean ones.Furthermore,ecological niche modeling predicted that the present distribution area of Chinese C.japonicum is likely to be unsuitable under global warming scenarios.Together with its limited distribution and genetic uniqueness,we recommend that Chinese C.japonicum deserves conservation priorities.

Cinnamomum chekiangenseCinnamomum cheniiCinnamomum japonicumecological niche modelingintegrative taxonomyspecies delimitation

Han-Yang Lin、Yue Yang、Wen-Hao Li、Yu-Xin Luo、Xiao-Hua Bai、Tetsuo Ohi-Toma、Changkyun Kim、Joo-Hwan Kim、Yun-Peng Zhao

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Laboratory of Systematic and Evolutionary Botany and Biodiversity,College of Life Sciences,Zhejiang University,Hangzhou 310058,China

School of Advanced Study,Taizhou University,Taizhou 318000,Zhejiang,China

Nature Fieldwork Center,Okayama University of Science,Okayama 700-0005,Japan

Division of Botany,Honam National Institute of Biological Resources,Mokpo 58762,South Korea

Department of Life Science,Gachon University,Seongnam 13120,South Korea

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National Key Research and Development Program of China

2017YFA0605104

2024

10.1111/jse.12950

植物分类学报
中国科学院植物研究所　中国植物学会

植物分类学报

CSTPCD
影响因子：0.322
ISSN：1674-4918
年,卷(期)：2024.62(1)
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