Unique parallel radiations of high-mountainous species of the genus Sedum (Crassulaceae) on the continental island of Taiwan

Takuro Ito, Chih Chieh Yu, Koh Nakamura, Kuo Fang Chung, Qin er Yang, Cheng Xin Fu, Zhe Chen Qi, Goro Kokubugata

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We explored the temporal and spatial diversification of the plant genus Sedum L. (Crassulaceae) in Taiwan based on molecular analysis of nrITS and cpDNA sequences from East Asian Sedum members. Our phylogenetic and ancestral area reconstruction analysis showed that Taiwanese Sedum comprised two lineages that independently migrated from Japan and Eastern China. Furthermore, the genetic distances among species in these two clades were smaller than those of other East Asian Sedum clades, and the Taiwanese members of each clade occupy extremely varied habitats with similar niches in high-mountain regions. These data indicate that species diversification occurred in parallel in the two Taiwanese Sedum lineages, and that these parallel radiations could have occurred within the small continental island of Taiwan. Moreover, the estimated time of divergence for Taiwanese Sedum indicates that the two radiations might have been correlated to the formation of mountains in Taiwan during the early Pleistocene. We suggest that these parallel radiations may be attributable to the geographical dynamics of Taiwan and specific biological features of Sedum that allow them to adapt to new ecological niches.

Original languageEnglish
Pages (from-to)9-22
Number of pages14
JournalMolecular Phylogenetics and Evolution
Volume113
DOIs
Publication statusPublished - 2017 Aug 1
Externally publishedYes

Keywords

  • Crassulaceae
  • Phylogeny
  • Radiation
  • Sedum
  • Taiwan

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

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