Premium
High within‐population mitochondrial DNA variation due to microvicariance and population mixing in the land snail Euhadra quaesita (Pulmonata: Bradybaenidae)
Author(s) -
Watanabe Y.,
Chiba S.
Publication year - 2001
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.0962-1083.2001.01388.x
Subject(s) - biology , land snail , haplotype , mitochondrial dna , monophyly , population , isolation by distance , pulmonata , evolutionary biology , genetic variation , ecology , zoology , gene flow , allele , snail , genetics , gastropoda , phylogenetics , gene , clade , sociology , demography
A high level of geographical variation at an exceptionally fine scale was detected in the mitochondrial 16 S ribosomal RNA genes of a land snail species Euhadra quaesita from the Kanto region of Japan. In total, 50 haplotypes were detected from 27 populations, with most sample sites possessing private alleles. In some individual populations the different haplotypes do not fall as a monophyletic group, so that some of the haplotypes are phylogenetically distant, differing from each other by > 10%. In contrast, phylogenetically similar haplotypes were found in separate sites at long distances from their main distribution. Together, these findings strongly suggest that contraction and expansion of populations has occurred repeatedly in the past. The subsequent expansion of populations and migration from different areas may have mixed distant populations. This repetition of isolation and mixing has resulted in an exceptionally fine scale of geographical variation, and the accumulation of high genetic diversity within and between populations of this species.