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Genetic structure of brown trout ( Salmo trutta , L.) populations from south‐western France: data from mitochondrial control region variability
Author(s) -
Aurelle D.,
Berrebi P.
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.1365-294x.2001.01293.x
Subject(s) - salmo , biology , mitochondrial dna , brown trout , haplotype , mtdna control region , genetics , trout , evolutionary biology , genetic structure , genetic variability , polymorphism (computer science) , genetic distance , zoology , genetic variation , gene , fishery , fish <actinopterygii> , genotype
The genetic relationships between several French Atlantic populations of brown trout were analysed using polymerase chain reaction–single‐strand conformation polymorphism and sequencing of two parts of the mitochondrial control region. Ten mitochondrial haplotypes were identified, separated by a small number of mutations. The distribution of these haplotypes confirmed our hypothesis of the existence of two genetically well‐differentiated groups of populations in this area, which has already been suggested using nuclear markers. Nuclear and mitochondrial markers, however, show different patterns of genetic differentiation: some populations which belong to one group according to allozyme results appear to be part of the other when using mitochondrial DNA. The origin of these different forms is discussed; they seem to belong to the Atlantic grouping. Nevertheless, the hypothesis of an ancestral and a modern form suggested for northern populations does not appear valid in this particular case.