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Intraspecific divergence in a coastal plant, Euphorbia jolkinii, at a major biogeographic boundary in East Asia.
Iwata, Hiroyuki; Ito, Takuro; Park, Jong-Soo; Kokubugata, Goro; Kakezawa, Akihiro; Kurosawa, Takahide; Nishimura, Akihiro; Noda, Hiroshi; Takayama, Koji.
Afiliação
  • Iwata H; Department of Botany, Faculty of Science, Kyoto University, Kyoto, Japan.
  • Ito T; Botanical Gardens, Tohoku University, Sendai, Japan.
  • Park JS; Honam National Institute of Biological Resources, Mokpo-si, Jeollanam-do, South Korea.
  • Kokubugata G; Department of Botany, National Museum of Nature and Science, Amakubo, Tsukuba, Japan.
  • Kakezawa A; Tsushima City, Tsushima, Nagasaki, Japan.
  • Kurosawa T; Faculty of Symbiotic System Science, Fukushima University, Fukushima, Japan.
  • Nishimura A; Department of Botany, Graduate School of Science, Kyoto University, Kyoto, Japan.
  • Noda H; Department of Botany, Graduate School of Science, Kyoto University, Kyoto, Japan.
  • Takayama K; Department of Botany, Graduate School of Science, Kyoto University, Kyoto, Japan.
Am J Bot ; 111(5): e16327, 2024 05.
Article em En | MEDLINE | ID: mdl-38725176
ABSTRACT
PREMISE Quaternary climatic fluctuations and long-distance seed dispersal across the sea are critical factors affecting the distribution of coastal plants, but the spatiotemporal nature of population expansion and distribution change of East Asian coastal plants during this period are rarely examined. To explore this process, we investigated the genome-wide phylogenetic patterns of Euphorbia jolkinii Boiss. (Euphorbiaceae), which grows widely on littoral areas of Japan, Korea, and Taiwan.

METHODS:

We used plastome sequences and genome-wide single nucleotide polymorphisms in samples across the species range to reveal phylogeographic patterns and spatiotemporal distributional changes. We conducted ecological niche modeling for the present and the last glacial maximum (LGM).

RESULTS:

Genetic differentiation was observed between the northern and southern populations of E. jolkinii, separated by the major biogeographic boundary, the Tokara Gap. These two groups of populations differentiated during the glacial period and subsequently intermingled in the intermorainic areas of the central Ryukyu Islands after the LGM. Ecological niche models suggested that the potential range of E. jolkinii was restricted to southern Kyushu; however, it was widespread in the southern Ryukyu Islands and Taiwan during the LGM.

CONCLUSIONS:

This study provides evidence of genetic differentiation among coastal plant populations separated by the prominent biogeographical boundary. Although coastal plants are typically expected to maintain population connectivity through sea-drifted seed dispersal, our findings suggest that genetic differences may arise because of a combination of limited gene flow and changes in climate during the glacial period.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Euphorbia / Filogeografia País como assunto: Asia Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Euphorbia / Filogeografia País como assunto: Asia Idioma: En Ano de publicação: 2024 Tipo de documento: Article