Biogeography of North Pacific Isoetes (Isoetaceae) inferred from nuclear and chloroplast DNA sequence data
- Authors
- Kim, Changkyun; Choi, Hong-Keun
- Issue Date
- Aug-2016
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Biogeography; Chloroplast DNA; Isoetes; molecular phylogeny; North Pacific; nrITS
- Citation
- JOURNAL OF PLANT BIOLOGY, v.59, no.4, pp.386 - 396
- Journal Title
- JOURNAL OF PLANT BIOLOGY
- Volume
- 59
- Number
- 4
- Start Page
- 386
- End Page
- 396
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/8075
- DOI
- 10.1007/s12374-016-0123-3
- ISSN
- 1226-9239
- Abstract
- Recent advances in phylogenetics indicate that reticulate evolution has played an important role in the emergence of IsoA << tes species in the North Pacific region. However, the biogeographical origin of the North Pacific IsoA << tes species remains contentious. We present a fossilcalibrated phylogeny of species from the North Pacific region based on molecular data. Within this framework, we discuss their ancestral areas and biogeographical history. North Pacific IsoA << tes are divided into two clades: clade I, consisting of East Asian, Papua New Guinean, and Australian species, and clade II, consisting of West Beringian and western North American species. Within clade I, Australian IsoA << tes species were an early divergent group, and Papua New Guinea's species form a sister clade to the East Asian species. Biogeographical reconstructions suggest an Australasian origin for the East Asian species that arose through long-distance dispersal during the late Oligocene. Within clade II, I. asiatica from West Beringia forms a clade with I. echinospora and I. muricata from Alaska. Western North America was the area of origin for the dispersal of IsoA << tes species to West Beringia via the Bering land bridge during the late Miocene. Our study identifies the biogeographic origin of the North Pacific IsoA << tes and suggests long-distance dispersal as the most likely explanation for their intercontinental distribution.
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