Molecular population genetics of male and female mitochondrial genomes in European mussels Mytilus Export

@article{citeulike:4053663, abstract = {Abstract\ \ The doubly uniparental system of mitochondrial inheritance (DUI) is best known in marine mussels Mytilus. Under DUI there are two types of mitochondrial DNA (mtDNA). The female type (F) is transmitted to offspring of both genders and the male type (M) exclusively to sons; consequently two distinct mtDNA lineages exist. The M lineage evolves under more relaxed selection than the F lineage resulting in higher polymorphism within the M lineage. Though this polymorphism is expected to make inferences on fine population structure easier using M instead of F data, no comprehensive comparative data exist to support this claim. We sequenced a 1,205\ bp fragment of M and F mtDNA comprising parts of the COIII and ND2 genes, and analysed 204 individuals representing three Mytilus species: M. edulis, M. galloprovincialis and M. trossulus from 13 European sampling sites. A clear distinction between Mediterranean and Atlantic populations was found with both M and F data, but much better geographic differentiation was found within the Atlantic using F rather than M data. In particular, Atlantic M. galloprovincialis can be differentiated from Atlantic M. edulis, and further subdivision of Atlantic M. edulis is possible using the F data but not the M data. Multiple tests of selection were carried out to attempt to explain this paradox. We concluded that the overall pattern of polymorphism is consistent with strong purifying selection; not only is this selection relaxed in the M lineage in comparison with the F lineage, but it is also more frequently interrupted by periodic selective sweeps within the M lineage.}, author = {\'{S}mietanka, Beata and Burzy\'{n}ski, Artur and Wenne, Roman}, citeulike-article-id = {4053663}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/s00227-009-1137-x}, citeulike-linkout-1 = {http://www.springerlink.com/content/5011g6667073147w}, day = {1}, doi = {10.1007/s00227-009-1137-x}, journal = {Marine Biology}, keywords = {biogeography, dui, mitochondria, mytilus, population\_genetics}, month = {April}, number = {5}, pages = {913--925}, posted-at = {2009-03-09 18:41:33}, priority = {2}, title = {Molecular population genetics of male and female mitochondrial genomes in European mussels Mytilus}, url = {http://dx.doi.org/10.1007/s00227-009-1137-x}, volume = {156}, year = {2009} }

TY - JOUR ID - citeulike:4053663 L3 - citeulike-article-id:4053663 N2 - Abstract  The doubly uniparental system of mitochondrial inheritance (DUI) is best known in marine mussels Mytilus. Under DUI there are two types of mitochondrial DNA (mtDNA). The female type (F) is transmitted to offspring of both genders and the male type (M) exclusively to sons; consequently two distinct mtDNA lineages exist. The M lineage evolves under more relaxed selection than the F lineage resulting in higher polymorphism within the M lineage. Though this polymorphism is expected to make inferences on fine population structure easier using M instead of F data, no comprehensive comparative data exist to support this claim. We sequenced a 1,205 bp fragment of M and F mtDNA comprising parts of the COIII and ND2 genes, and analysed 204 individuals representing three Mytilus species: M. edulis, M. galloprovincialis and M. trossulus from 13 European sampling sites. A clear distinction between Mediterranean and Atlantic populations was found with both M and F data, but much better geographic differentiation was found within the Atlantic using F rather than M data. In particular, Atlantic M. galloprovincialis can be differentiated from Atlantic M. edulis, and further subdivision of Atlantic M. edulis is possible using the F data but not the M data. Multiple tests of selection were carried out to attempt to explain this paradox. We concluded that the overall pattern of polymorphism is consistent with strong purifying selection; not only is this selection relaxed in the M lineage in comparison with the F lineage, but it is also more frequently interrupted by periodic selective sweeps within the M lineage. IS - 5 JF - Marine Biology EP - 925 TI - Molecular population genetics of male and female mitochondrial genomes in European mussels Mytilus VL - 156 SP - 913 KW - biogeography KW - dui KW - mitochondria KW - mytilus KW - population_genetics AU - Śmietanka, Beata AU - Burzyński, Artur AU - Wenne, Roman PY - 2009/04/01/ UR - http://dx.doi.org/10.1007/s00227-009-1137-x ER -