2024-03-29T13:52:53Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00019863
2022-12-14T04:16:26Z
1169:1170
Unexpected monophyletic origin of Ephoron shigae unisexual reproduction strains and their rapid expansion across Japan
Sekine, K.
Hayashi, F.
Tojo, K.
automixis
geographical parthenogenesis
phylogeography
thelytoky
The burrowing polymitarcyid mayfly Ephoron shigae is distributed across Japan, Korea, northeast China and far east Russia. Some populations are bisexual, and others are unisexual, i.e. geographically parthenogenetic throughout Japan. In general, parthenogenetic organisms are often found in harsh environments, such as at high latitudes and altitudes, in xeric as opposed to mesic conditions, in isolated habitats such as islands and island-like areas, and at the peripheral regions of the taxon's range. In E. shigae, however, the distributions of bisexual and unisexual populations overlap broadly in their respective geographical ranges. In the analysis of mitochondrial 16S rRNA and COI, we revealed that unisexual populations were of monophyletic origin and recently differentiated somewhere in western Japan. In the nuclear DNA EFI-alpha analysis, parthenogenetic strains had two genotypes, i.e. the heterozygous genotype of E1/E3 and the homozygous genotype of E1/E1 or E3/E3, while specimens of bisexual lineage had 20 genotypes. These results are consistent with an automixis mode of reproduction for the parthenogenetic strains, and also support the monophyletic origin of the parthenogenetic strains. Furthermore, there would be no gene flow between the specimens of the bisexual lineage and those of the parthenogenetic strain.
Article
ROYAL SOCIETY OPEN SCIENCE. 2(6):150072 (2015)
journal article
ROYAL SOC
2015-06
application/pdf
ROYAL SOCIETY OPEN SCIENCE
6
2
150072
2054-5703
https://soar-ir.repo.nii.ac.jp/record/19863/files/150072.full.pdf
eng
26543584
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=pubmed&term=26543584
10.1098/rsos.150072
https://doi.org/10.1098/rsos.150072
© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.