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Chromosoma

, Volume 85, Issue 2, pp 163–179 | Cite as

Genome evolution in pocket gophers (genus Thomomys)

II. Variation in cellular DNA content
  • Steven W. Sherwood
  • James L. Patton
Article

Abstract

Cellular DNA content (2 C-value) was measured by fluorescence flow cytometry of chromomycin-A3 stained spleen cells in 2 subgenera, 5 species, and 21 subspecies of pocket gophers (genus Thomomys). The data indicate that, in Thomomys: (1) interspecific variation is extensive but, while some congeneric species differ by as much as 230%, others are identical in C-value; (2) intraspecific differentiation can be extensive with C-values differing by as much as 35%; and (3) populations of the same subspecies with apparently similar karyotypes can differ significantly in C-value. The implications of these results for hypotheses of the “adaptive” significance of C-value variation and genome evolution are discussed.

Keywords

Flow Cytometry Developmental Biology Spleen Cell Genome Evolution Interspecific Variation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Steven W. Sherwood
    • 1
  • James L. Patton
    • 1
  1. 1.Museum of Vertebrate ZoologyUniversity of CaliforniaBerkeleyUSA

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