Phylogenetic Relationships and Geographic Structure in Pocket Gophers in the Genus Thomomys

Phylogenetic Relationships and Geographic Structure in Pocket Gophers in the Genus Thomomys Phylogenetic relationships among pocket gophers were examined based on the complete sequence for the mitochondrial cytochrome b gene (1140 base pairs). The tribe Geomyini ( Geomys, Orthogeomys, Cratogeomys, and Pappogeomys ) was well differentiated from the tribe Thomomyini ( Thomomys ), using the heteromyid genera Dipodomys and Perognathus as the outgroup. Within the genus Thomomys, the species in the subgenus Thomomys ( T. talpoides, T. monticola, and T. mazama ) differed from those in the subgenus Megascapheus ( T. bottae, T. townsendii, and T. umbrinus ) by an average of 19.3% uncorrected sequence divergence. Extensive sampling within one species, T. bottae, revealed strongly differentiated geographic units, with a maximum difference among localities of 15.7%. The geographic units within T. bottae coincided with geographic regions based on allozyme data in some areas, but not at all boundaries. The geographic units within currently recognized species in the bottae group (subgenus Megascapheus ) were not grouped together with a high level of confidence. The pattern suggests a rapid radiation of the bottae group, followed by geographic subdivision. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Molecular Phylogenetics and Evolution Elsevier

Phylogenetic Relationships and Geographic Structure in Pocket Gophers in the Genus Thomomys

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Publisher
Elsevier
Copyright
Copyright © 1998 Academic Press
ISSN
1055-7903
eISSN
1095-9513
DOI
10.1006/mpev.1997.0459
pmid
9479688
Publisher site
See Article on Publisher Site

Abstract

Phylogenetic relationships among pocket gophers were examined based on the complete sequence for the mitochondrial cytochrome b gene (1140 base pairs). The tribe Geomyini ( Geomys, Orthogeomys, Cratogeomys, and Pappogeomys ) was well differentiated from the tribe Thomomyini ( Thomomys ), using the heteromyid genera Dipodomys and Perognathus as the outgroup. Within the genus Thomomys, the species in the subgenus Thomomys ( T. talpoides, T. monticola, and T. mazama ) differed from those in the subgenus Megascapheus ( T. bottae, T. townsendii, and T. umbrinus ) by an average of 19.3% uncorrected sequence divergence. Extensive sampling within one species, T. bottae, revealed strongly differentiated geographic units, with a maximum difference among localities of 15.7%. The geographic units within T. bottae coincided with geographic regions based on allozyme data in some areas, but not at all boundaries. The geographic units within currently recognized species in the bottae group (subgenus Megascapheus ) were not grouped together with a high level of confidence. The pattern suggests a rapid radiation of the bottae group, followed by geographic subdivision.

Journal

Molecular Phylogenetics and EvolutionElsevier

Published: Feb 1, 1998

References

  • Intraspecific phylogeography: The mitochondrial bridge between population genetics and systematics
    Avise, J.C.; Arnold, J.; Ball, R.M.; Bermingham, E.; Lamb, T.; Neigel, J.E.; Reeb, C.A.; Saunders, N.C.
  • Phylogenetic evidence of mitochondrial DNA introgression among pocket gophers in New Mexico (family Geomyidae)
    Ruedi, M.; Smith, M.F.; Patton, J.L.
  • Variation in mitochondrial cytochrome b
    Smith, M.F.; Patton, J.L.
  • The diversification of South American murid rodents: evidence from mitochondrial DNA sequence data for the akodontine tribe
    Smith, M.F.; Patton, J.L.
  • Phylogenetic inference
    Swofford, D.L.; Olsen, G.J.; Waddell, P.J.; Hillis, D.M.

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