Academic Thesis

Basic information

Name Yano Okihito
Belonging department
Occupation name
researchmap researcher code B000339337
researchmap agency Okayama University of Science

Title

East Asia–eastern North America disjunction revisited: Possible westward colonization route via the Western Palearctic in Carex sect. Paniceae (Cyperaceae)

Bibliography Type

Joint Author

Author

Lu Y-F, Benítez‐Benítez C, Yano O, Ikeda H, Jung S‐E, Kim S, Jiménez‐Mejías P, Jin X‐F

Summary

Carex sect. Paniceae sensu lato (s.l.) exhibits two major disjunct centers of diversity: eastern North America and East Asia. This pattern, commonly observed in other plant groups, has been associated with trans‐Pacific dispersal from Asia to America and subsequent local extinctions in western North America. This study reconstructed a phylogenetic tree using two nuclear (external transcribed spacer and internal transcribed spacer) and three plastid (matK, trnL‐F, and rpl32‐trnLUAG) regions, along with 474 nuclear loci from high‐throughput sequencing (Hyb‐Seq). Dating analysis and ancestral area reconstruction were used to investigate the evolutionary and biogeographic history of sect. Paniceae s.l. A broader circumscription of sect. Paniceae s.l., incorporating sects. Bicolores and Laxiflorae, is established. Two primary clades were identified: one clade predominantly diversified in North America and the other in East Asia. Biogeographic analyses suggested a likely origin of sect. Paniceae s.l. in the Palearctic during the Late Miocene. The most probable scenario involved dispersal to eastern North America via the Western Palearctic, followed by subsequent dispersal into western North America, other parts of the continent, and back to the Old World. Within East Asia, the group was inferred to have diversified during the Pliocene and Pleistocene, with the basalmost nodes inferred in mainland China. Multiple dispersal events from this region to the Russian Far East, Korea, and Japan were inferred. This study highlights the underexplored role of East Asia in the biogeography of grass‐like plants and the existence of alternative migration routes in explaining the East Asia–eastern North America pattern of disjunction.

Magazine(name)

Journal of Systematics and Evolution

Publisher

Volume

63

Number Of Pages

4

StartingPage

974

EndingPage

987

Date of Issue

2025/07

Referee

Exist

Invited

Not exist

Language

English

Thesis Type

Research papers (academic journals)

ISSN

DOI

NAID

PMID

URL

J-GLOBAL ID

arXiv ID

ORCID Put Code

DBLP ID