Geographic genetic architecture of pocket gopher (Thomomys bottae) populations in Baja California, Mexico

Molecular Ecology
S Ticul Alvarez-Castañeda, J L Patton

Abstract

Phylogenetic analyses of complete mitochondrial cytochrome b sequences support the monophyly of pocket gopher (Thomomys bottae) populations from the 1000 km length of the Baja California peninsula of Mexico, relative to other geographical segments of the species range in western North America. The Baja California peninsula is an area that encompasses considerable ecomorphological and infraspecific diversity within this pocket gopher species. However, detailed population analyses encompassing 35 localities distributed over the southern half of the peninsula reveal only trivial phylogeographical structure. Rather, most of the 72 unique 500-base pair haplotypes examined from 142 individuals is restricted to single populations, although a few haplotypes are shared broadly across geography. Individual populations are typically comprised of haplotype sets from different branches in a network of relationships. Analysis of molecular variance (amova) indicates that approximately half of the total pool of variation is contained among individuals within local populations, and that only about 25% can be explained by the regional subdivisions of current subspecies distributions or physiographic realms. A hypothesized historical vicariant ev...Continue Reading

References

Feb 28, 1998·Molecular Phylogenetics and Evolution·M F Smith
May 20, 1998·Proceedings of the National Academy of Sciences of the United States of America·A PolanskiR Chakraborty
Nov 30, 2000·Proceedings of the National Academy of Sciences of the United States of America·B R RiddleJ R Jaeger
Apr 5, 2001·Proceedings of the National Academy of Sciences of the United States of America·P Beerli, J Felsenstein
Aug 1, 1990·Evolution; International Journal of Organic Evolution·Joanne C Daly, J L Patton
Aug 1, 1995·Evolution; International Journal of Organic Evolution·Alan R Rogers

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