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- Title
Preliminary assessment of genetic variation in the Japanese endemic freshwater crab, Geothelphusa dehaani, based on mitochondrial DNA sequences.
- Authors
De la Cruz Huervana, Joana Joy; Yuichi Kano; Daiki Ando; Norio Onikura; Yoshihisa Kurita
- Abstract
Geothelphusa dehaani, a freshwater crab species endemic to Japan, has the largest distribution range amongst the 19 known species in the country. Due to its low dispersal capability and restricted habitat to freshwater, it serves as an excellent model for understanding gene flow between geographically isolated populations. In this study, we analysed the genetic relationships of 26 G. dehaani populations collected from different locations in the Japanese archipelago using two mitochondrial DNA regions - cytochrome oxidase subunit I (COI) and cytochrome b (cytB). Our results from the analysis of molecular variance (AMOVA) revealed high genetic variation amongst populations and the phylogenetic analysis identified four geographical groups: Clade I - Honshu and Shikoku, Clade II - north-eastern Kyushu, Clade III - southern Kyushu and Clade IV - north-western Kyushu. Notably, Clade IV exhibited the highest genetic distance amongst the observed groupings. These findings highlight the need for further examination of G. dehaani in Kyushu, including morphological and behavioural traits, to better understand the observed diversity within the species in the region.
- Subjects
FRESHWATER crabs; GENETIC variation; DNA sequencing; CYTOCHROME oxidase; GENETIC distance
- Publication
Biodiversity Data Journal, 2023, p1
- ISSN
1314-2836
- Publication type
Article
- DOI
10.3897/BDJ.11.e97438