Museum, University of Nebraska State

 

Date of this Version

1980

Citation

American Naturalist (1980) 116(1): 143-146. "Notes and comments."

Comments

Copyright 1980, University of Chicago. Used by permission.

Abstract

For the past decade, numerous investigators have attempted to explain the plethora of genetic polymorphism found in nature (see Ayala 1976). However, few researchers have been able to document how polymorphisms have been maintained, whether the polymorphisms were genic or chromosomal. Our investigations into the maintenance of a Robertsonian chromosomal polymorphism in the plains pocket goher, Geomys bursarius major, have revealed evidence that this polymorphism is maintained by differential viabilities of the three chromosomal morphs, with the heterozygote being favored.