Microsatellite variation in colonizing and palearctic populations of Drosophila subobscura

Molecular Biology and Evolution
M PascualLuis Serra

Abstract

The recent colonization of North America by Drosophila subobscura has provided a great opportunity to analyze a colonization process from the beginning. A comparative study using 10 microsatellite loci was conducted for five European and two North American populations. No genetic differentiation between European populations was detected, indicating that gene flow is high among them and that the microsatellites used in the present work represent neutral markers not subject to differentiation due to selection. Extensive reduction in the number of alleles and a significant decrease in heterozygosity in colonizing populations were detected that could be explained by the founder effect and a subsequent quick but not infinite expansion. Assuming that all alleles present in the colonized area were carried by the sample of colonizers, we estimated that most probably 4-11 individuals expanded in the new area. F(ST) and the chord distance measures reflect the colonization process more accurately, since drift has been the major force in differentiating the Old and New World populations, and thus other measures considering allele size differences, such as Rho(ST) and deltamu2, are less reliable for studying nonequilibrium populations. Fina...Continue Reading

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Citations

Mar 4, 2010·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Josiane SantosMarta Pascual
Mar 12, 2004·Molecular Phylogenetics and Evolution·António BrehmAna M González
Aug 16, 2008·BMC Evolutionary Biology·María Pilar García GuerreiroAntonio Fontdevila
Aug 24, 2013·Journal of Genetics·Josiane SantosMargarida Matos
Sep 20, 2008·Journal of Evolutionary Biology·M DemontT W J Garner
Jan 28, 2009·Journal of Evolutionary Biology·P J Fernández IriarteL Serra
Dec 18, 2013·Ecology and Evolution·Lee A RollinsWilliam B Sherwin
Apr 20, 2006·Developmental and Comparative Immunology·Patrice Eslin, Géraldine Doury
Jan 13, 2015·Genome Génome / Conseil National De Recherches Canada·Goran ZivanovicFrancesc Mestres
Sep 25, 2003·Evolution; International Journal of Organic Evolution·Joan BalanyàElisabet Solé
Sep 14, 2007·Hereditas·Goran ZivanovicFrancesc Mestres
Oct 19, 2019·Genetica·Goran ZivanovicFrancesc Mestres
Dec 23, 2015·Journal of Genetics·Marija TanaskovicMarko Andjelkovic

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