title: Temporal and spatial instability in neutral and adaptive (MHC) genetic variation in marginal salmon populations.
abstract: The role of marginal populations for the long-term maintenance of species' genetic diversity and evolutionary potential is particularly timely in view of the range shifts caused by climate change. The Centre-Periphery hypothesis predicts that marginal populations should bear reduced genetic diversity and have low evolutionary potential. We analysed temporal stability at neutral microsatellite and adaptive MHC genetic variation over five decades in four marginal Atlantic salmon populations located at the southern limit of the species' distribution with a complicated demographic history, which includes stocking with foreign and native salmon for at least 2 decades. We found a temporal increase in neutral genetic variation, as well as temporal instability in population structuring, highlighting the importance of temporal analyses in studies that examine the genetic diversity of peripheral populations at the margins of the species' range, particularly in face of climate change.
authors.affiliation: Institute of Zoology, Zoological Society of London, Regent's Park, London, NW1 4RY, UK.
authors.forename: Kate
authors.initials: K
authors.lastname: Ciborowski
authors.affiliation: Institute of Zoology, Zoological Society of London, Regent's Park, London, NW1 4RY, UK.
authors.forename: William C
authors.initials: WC
authors.lastname: Jordan
authors.affiliation: Department of Biosciences, College of Science, Swansea University, Swansea SA2 8PP, UK.
authors.forename: Carlos
authors.initials: C
authors.lastname: Garcia de Leaniz
authors.affiliation: Department of Biosciences, College of Science, Swansea University, Swansea SA2 8PP, UK.
authors.forename: Sofia
authors.initials: S
authors.lastname: Consuegra
mesh_terms: D000818:Animals; D014644:Genetic Variation; D005828:Genetics, Population; D008285:Major Histocompatibility Complex / Q000235:genetics*; D018895:Microsatellite Repeats; D010802:Phylogeny; D020317:Salmo salar / Q000145:classification / Q000235:genetics*; D012641:Selection, Genetic; D017422:Sequence Analysis, DNA; D062211:Spatio-Temporal Analysis