The influence of the arid Andean high plateau on the phylogeography and population genetics of guanaco (Lama guanicoe) in South America

Marin, J. C. and Gonzalez, B. A. and Poulin, E. and Casey, C. S. and Johnson, W. E. (2013) The influence of the arid Andean high plateau on the phylogeography and population genetics of guanaco (Lama guanicoe) in South America. Molecular Ecology, 22 (2). pp. 463-482. ISSN 0962-1083

Full content URL: http://dx.doi.org/10.1111/mec.12111

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Item Type:Article
Item Status:Live Archive

Abstract

A comprehensive study of the phylogeography and population genetics of the largest wild artiodactyl in the arid and cold-temperate South American environments, the guanaco (Lama guanicoe) was conducted. Patterns of molecular genetic structure were described using 514 bp of mtDNA sequence and 14 biparentally inherited microsatellite markers from 314 samples. These individuals originated from 17 localities throughout the current distribution across Peru, Bolivia, Argentina and Chile. This confirmed well-defined genetic differentiation and subspecies designation of populations geographically separated to the northwest (L. g. cacsilensis) and southeast (L. g. guanicoe) of the central Andes plateau. However, these populations are not completely isolated, as shown by admixture prevalent throughout a limited contact zone, and a strong signal of expansion from north to south in the beginning of the Holocene. Microsatellite analyses differentiated three northwestern and 4-5 southeastern populations, suggesting patterns of genetic contact among these populations. Possible genetic refuges were identified, as were source-sink patterns of gene flow at historical and recent time scales. Conservation and management of guanaco should be implemented with an understanding of these local population dynamics while also considering the preservation of broader adaptive variation and evolutionary processes. © 2012 Blackwell Publishing Ltd.

Keywords:microsatellite DNA, mitochondrial DNA, animal, article, Artiodactyla, DNA sequence, gene flow, genetic variability, genetics, phylogeography, population dynamics, population genetics, South America, Animals, Camelids, New World, DNA, Mitochondrial, Genetic Variation, Genetics, Population, Microsatellite Repeats, Sequence Analysis, DNA, South America, Artiodactyla, Camelidae, Lama guanicoe
Subjects:C Biological Sciences > C180 Ecology
Divisions:College of Science > School of Life Sciences
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ID Code:11566
Deposited On:07 Jan 2014 16:07

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