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Variation in mitochondrial DNA and post‐glacial colonization of north western Europe by brown trout
Author(s) -
Hynes R. A.,
Ferguson A.,
McCann M. A.
Publication year - 1996
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1996.tb01418.x
Subject(s) - biology , haplotype , mitochondrial dna , colonization , trout , restriction fragment length polymorphism , zoology , brown trout , glacial period , genetic variation , restriction enzyme , ecology , allele , genetics , genotype , dna , fishery , gene , paleontology , fish <actinopterygii>
A purified mitochondrial DNA (mtDNA) probe was used to examine restriction fragment length polymorphisms produced by six restriction enzymes ( Xba I, Eco RV, Ava II, Hinf I, Hae III, Mbo I) in 915 brown trout from western Europe. A total of 20 composite haplotypes were found with one to seven haplotypes in individual populations. Icelandic trout samples from north, south, east, and west coast drainages showed only a single common haplotype in contrast to the high level of polymorphism found in Irish and Scottish populations. The phylogeny of mtDNA haplotypes and the pattern of haplotype distribution suggests that post‐glacial colonization of brown trout in NW Europe was more complex than the dual colonization model which has been proposed on the basis of differential LDH‐5* allele distribution. For example, Lough Melvin (Ireland) appears to have been independently