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| Home > Articles > Published articles > PRDM9 diversity at fine geographical scale reveals contrasting evolutionary patterns and functional constraints in natural populations of house mice |
| Home > Articles > Published articles > PRDM9 diversity at fine geographical scale reveals contrasting evolutionary patterns and functional constraints in natural populations of house mice |
(Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí") (University of Oxford. Big Data Institute) (Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí") (Universidade de Lisboa. Centro de Estudos do Ambiente e do Mar) (Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí") (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)
| Date: | 2019 |
| Abstract: | One of the major challenges in evolutionary biology is the identification of the genetic basis of postzygotic reproductive isolation. Given its pivotal role in this process, here we explore the drivers that may account for the evolutionary dynamics of the PRDM9 gene between continental and island systems of chromosomal variation in house mice. Using a data set of nearly 400 wild-caught mice of Robertsonian systems, we identify the extent of PRDM9 diversity in natural house mouse populations, determine the phylogeography of PRDM9 at a local and global scale based on a new measure of pairwise genetic divergence, and analyze selective constraints. We find 57 newly described PRDM9 variants, this diversity being especially high on Madeira Island, a result that is contrary to the expectations of reduced variation for island populations. Our analysis suggest that the PRDM9 allelic variability observed in Madeira mice might be influenced by the presence of distinct chromosomal fusions resulting from a complex pattern of introgression or multiple colonization events onto the island. Importantly, we detect a significant reduction in the proportion of PRDM9 heterozygotes in Robertsonian mice, which showed a high degree of similarity in the amino acids responsible for protein-DNA binding. Our results suggest that despite the rapid evolution of PRDM9 and the variability detected in natural populations, functional constraints could facilitate the accumulation of allelic combinations that maintain recombination hotspot symmetry. We anticipate that our study will provide the basis for examining the role of different PRDM9 genetic backgrounds in reproductive isolation in natural populations. |
| Grants: | Ministerio de Economía y Competitividad CGL2017-83802-P Ministerio de Economía y Competitividad BFU2015-71786-REDT Ministerio de Economía y Competitividad BES-2015-072924 Ministerio de Economía y Competitividad CGL2014-54317-P Ministerio de Economía y Competitividad BES-2011-047722 Ministerio de Economía y Competitividad CGL2010-15243 Ministerio de Economía y Competitividad CGL2010-2017 |
| Rights: | 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, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.  |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | PRDM9 ; Mus musculus domesticus ; Robertsonian fusion ; Postzygotic reproductive isolation ; Selection ; Recombination |
| Published in: | Molecular biology and evolution, Vol. 36 Núm. 8 (january 2019) , p. 1686-1700, ISSN 1537-1719 |
