Discordant Phylogeographic Patterns Between the Y Chromosome and Mitochondrial DNA in the House Mouse: Selection on the Y Chromosome?

摘要: We have compared patterns of geographic variation and molecular divergence mitochondrial DNA (mtDNA) Y chromosome over the range different subspecies Mus musculus. MtDNA was typed for 305 nucleotides in control region, 834 base pairs (bp) Zfy introns 242 bp Sry, a Zfy2 18-bp deletion, two microsatellites. Apparent discrepancies exist between distributions lineages mtDNA major Y-chromosome thus defined: some share same lineage but or vice versa. One microsatellite reveals geographically clustered inside distribution each lineage, showing that new variants can rapidly spread locally. The time only about one fourth lineages. Although this recent coalescence chromosomes could partly be due to lower ancestral polymorphism chromosome, it suggests secondary introgression after radiation might occurred. There is evidence differentiation contributes partial reproductive isolation subspecies, evolution suggest selection has played role rapid across subspecies.