naa a22 4500 510788033 CHVBK 20180411083309.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s12041-013-0239-x doi (NATIONALLICENCE)springer-10.1007/s12041-013-0239-x Fast evolutionary genetic differentiation during experimental colonizations [Elektronische Daten] [JOSIANE SANTOS, MARTA PASCUAL, PEDRO SIMÕES, INÊS FRAGATA, MICHAEL ROSE, MARGARIDA MATOS] Founder effects during colonization of a novel environment are expected to change the genetic composition of populations, leading to differentiation between the colonizer population and its source population. Another expected outcome is differentiation among populations derived from repeated independent colonizations starting from the same source. We have previously detected significant founder effects affecting rate of laboratory adaptation among Drosophila subobscura laboratory populations derived from the wild. We also showed that during the first generations in the laboratory, considerable genetic differentiation occurs between foundations. The present study deepens that analysis, taking into account the natural sampling hierarchy of six foundations, derived from different locations, different years and from two samples in one of the years. We show that striking stochastic effects occur in the first two generations of laboratory culture, effects that produce immediate differentiation between foundations, independent of the source of origin and despite similarity among all founders. This divergence is probably due to powerful genetic sampling effects during the first few generations of culture in the novel laboratory environment, as a result of a significant drop in N e. Changes in demography as well as high variance in reproductive success in the novel environment may contribute to the low values of N e. This study shows that estimates of genetic differentiation between natural populations may be accurate when based on the initial samples collected in the wild, though considerable genetic differentiation may occur in the very first generations of evolution in a new, confined environment. Rapid and significant evolutionary changes can thus occur during the early generations of a founding event, both in the wild and under domestication, effects of interest for both scientific and conservation purposes. Indian Academy of Sciences, 2013 founding event nationallicence genetic drift nationallicence colonization nationallicence captive populations nationallicence genetic differentiation nationallicence Drosophila subobscura nationallicence SANTOS JOSIANE Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut PASCUAL MARTA Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, 08028, Barcelona, España aut SIMÕES PEDRO Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut FRAGATA INÊS Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut ROSE MICHAEL Department of Ecology and Evolutionary Biology, University of California, 92697, Irvine, CA, USA aut MATOS MARGARIDA Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut Journal of Genetics Springer India 92/2(2013-08-01), 183-194 0022-1333 92:2<183 2013 92 12041 https://doi.org/10.1007/s12041-013-0239-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12041-013-0239-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- SANTOS JOSIANE Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut NATIONALLICENCE 700 1- PASCUAL MARTA Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, 08028, Barcelona, España aut NATIONALLICENCE 700 1- SIMÕES PEDRO Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut NATIONALLICENCE 700 1- FRAGATA INÊS Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut NATIONALLICENCE 700 1- ROSE MICHAEL Department of Ecology and Evolutionary Biology, University of California, 92697, Irvine, CA, USA aut NATIONALLICENCE 700 1- MATOS MARGARIDA Faculdade de Ciências da Universidade de Lisboa, Centro de Biologia Ambiental, Departamento de Biologia Animal, Campo Grande, 1749-016, Lisboa, Portugal aut NATIONALLICENCE 773 0- Journal of Genetics Springer India 92/2(2013-08-01), 183-194 0022-1333 92:2<183 2013 92 12041 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer