Laboratory Selection Quickly Erases Historical Differentiation
Fragata, Inês (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Simões, Pedro (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Lopes-Cunha, Miguel (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Lima, Margarida (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Kellen, Bárbara (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Bárbaro, Margarida (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Santos, Josiane (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)
Rose, Michael R. (University of California Irvine. Department of Ecology and Evolutionary Biology)
Santos, Mauro (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Matos, Margarida (Universidade de Lisboa. Centro de Biologia Ambiental and Departamento de Biologia Animal)

Data:	2014
Resum:	The roles of history, chance and selection have long been debated in evolutionary biology. Though uniform selection is expected to lead to convergent evolution between populations, contrasting histories and chance events might prevent them from attaining the same adaptive state, rendering evolution somewhat unpredictable. The predictability of evolution has been supported by several studies documenting repeatable adaptive radiations and convergence in both nature and laboratory. However, other studies suggest divergence among populations adapting to the same environment. Despite the relevance of this issue, empirical data is lacking for real-time adaptation of sexual populations with deeply divergent histories and ample standing genetic variation across fitness-related traits. Here we analyse the real-time evolutionary dynamics of Drosophila subobscura populations, previously differentiated along the European cline, when colonizing a new common environment. By analysing several life-history, physiological and morphological traits, we show that populations quickly converge to the same adaptive state through different evolutionary paths. In contrast with other studies, all analysed traits fully converged regardless of their association with fitness. Selection was able to erase the signature of history in highly differentiated populations after just a short number of generations, leading to consistent patterns of convergent evolution.
Ajuts:	Ministerio de Ciencia e Innovación CGL2010-15395
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	PloS one, Vol. 9, Issue 5 (May 2014) , art. e96227, ISSN 1932-6203

DOI: 10.1371/journal.pone.0096227
PMID: 24788553

9 p, 860.7 KB

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