| phylogeographic analysis of mitochondrial gene flow and introgression in the salamander, plethodon shermani. | plethodon shermani comprises a series of geographically disjunct populations occupying high-elevation mountain isolates. these populations hybridize at their borders with salamanders of the plethodon glutinosus species complex, and past range expansions inferred from pleistocene climatic cycles may have increased the possible genetic interactions between p. shermani and species of the p. glutinosus complex. because mitochondrial dna haplotypes often show introgression across species borders, we ... | 2005 | 15813784 |
| patterns of differential introgression in a salamander hybrid zone: inferences from genetic data and ecological niche modelling. | hybrid zones have yielded considerable insight into many evolutionary processes, including speciation and the maintenance of species boundaries. presented here are analyses from a hybrid zone that occurs among three salamanders -plethodon jordani, plethodon metcalfi and plethodon teyahalee- from the southern appalachian mountains. using a novel statistical approach for analysis of non-clinal, multispecies hybrid zones, we examined spatial patterns of variation at four markers: single-nucleotide ... | 2010 | 20819165 |