The origin and population divergence of Parabotia curtus (Botiidae: Cypriniformes), a relict loach in Japan

Parabotia curtus is the only botiid species in Japan, where its range is restricted to two small regions, Kinki and Sanyo. In this study, we performed molecular phylogenetic and population genetic analyses to reconstruct the evolutionary history of this species. A time tree constructed based on mito...

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Bibliographic Details
Published in:Ichthyological research 2023-04, Vol.70 (2), p.256-267
Main Authors: Ido, Keita, Abe, Tsukasa, Iwata, Akihisa, Watanabe, Katsutoshi
Format: Article
Language:English
Subjects:
Animal Systematics/Taxonomy/Biogeography
Biomedical and Life Sciences
Divergence
Ecology
Evolutionary genetics
Freshwater
Freshwater & Marine Ecology
Genetic analysis
Genomes
Ichthyofauna
Inland water environment
Life Sciences
Microsatellites
Miocene
Mitochondria
Nucleotide sequence
Parabotia
Phylogenetics
Phylogeny
Pleistocene
Population genetics
Population number
Zoology
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Summary:Parabotia curtus is the only botiid species in Japan, where its range is restricted to two small regions, Kinki and Sanyo. In this study, we performed molecular phylogenetic and population genetic analyses to reconstruct the evolutionary history of this species. A time tree constructed based on mitochondrial genome data revealed that P . curtus was one of the earliest species derived from the most northward range-expanding botiid group ( Parabotia ) during the Late Miocene. A reduction in its distribution and population size during the Late Pleistocene was inferred from shallow but clear regional population divergence, as verified by mitochondrial sequence and microsatellite data. These results provide evidence that this species is a relict of an old layer of Japanese freshwater ichthyofauna and emphasize the need to conserve the Kinki and Sanyo populations as distinct evolutionary units.
ISSN:1341-8998
1616-3915
DOI:10.1007/s10228-022-00884-z