Abstract
Determining the relationships between environmental variables and genetic diversity is critical to understand the processes that drive evolution in species-contact areas. We employed a combination of modeling approaches and multivariate statistical analyses to analyze mtDNA diversity in a hybrid zone between two evolutionary lineages of honeybees in order to interpret the microevolutionary processes that led to the observed spatial pattern of diversity. The model located the west European honeybee lineage mainly across temperate areas characterized by mild winters and high water availability throughout the year, whereas the African lineage was mainly associated with warmer and drier areas. Selection could be playing an important role in shaping the life history evolution, particularly affecting the mitochondria, and also resulting in hitchhiking effects on particular regions of the mitochondrial genome.
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Acknowledgments
We thank all the bee-keepers and associations (particularly Coordinadora de Organizaciones de Agricultores y Ganaderos, COAG) that generously contributed samples and their time. We thank O. Rodríguez, J. Ornia, E. Muñiz and U. Mediel. Thanks to R. Angus, who helped us improve the manuscript with their comments and suggestions during the revision process. This work was supported by projects RZ00-013 (Spanish National Institute of Agricultural Investigation, INIA) and EVK2 2000-00628 (BABE, V European Union Framework). F. Cánovas is supported by a post-doctoral fellowship from the FCT (Fundacão para Ciência e Tecnologia, Portugal). This study was conducted entirely using open source software.
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Cánovas, F., De la Rúa, P., Serrano, J. et al. Analysis of a contact area between two distinct evolutionary honeybee units: an ecological perspective. J Insect Conserv 18, 927–937 (2014). https://doi.org/10.1007/s10841-014-9701-1
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DOI: https://doi.org/10.1007/s10841-014-9701-1