Thesis Title

A Comparison of Genetic Differentiation and Gene Flow Among Populations of Two Species of Mice (Peromyscus)

Date of Graduation

Summer 1987

Degree

Master of Science in Biology

Department

Biology

Committee Chair

Lynn Robbins

Subject Categories

Biology

Abstract

Electrophoretic and chromosomal variability within and among populations of Peromyscus attwateri and P. leucopus from four localities in southwest Missouri was examined. P. attwateri lives on isolated, rocky habitats that have been separated for at least 4000 years, whereas P. leucopus has a continuous distribution in the woodland habitats which surround these areas. No chromosomal variation was found in either species. Allozymic variability was lower in the isolated populations of P. attwateri than in the continuous populations of P. leucopus. Of the seventeen gene loci examined, seven polymorphic enzyme systems were found variable in P. attwateri and nine systems were found variable in P. leucopus. Results indicate that genetic similarities and differences among populations of P. attwateri are not affected by gene flow. Populations of P. leucopus tend to show genetic differences due more to isolation by distance.

Copyright

© Janice Elaine Schnake

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