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The Journal of Heredity 1981:72(2):94-96
© 1981 The American Genetic Association 72:94-96

research-article

Fertility is not a function of geographic distance in Tetrahymena

Dennis Nyberg

The author is associate professor in the Department of Biological Sciences, University of Illinois at Chicago Circle, P.O. Box 4348, Chicago, IL 60680. He wishes to thank Patricia Bishop for technical assistance. Parts of this study were supported by grants from the University of Illinois Research Board, NSF DEB 76-00126, and PHS ES 02003.

Abstract

The fertility of crosses between wild stocks of Tetrahymena americanis (n = 93) and T. hegewischi (n = 52) was not significantly related to the square root of the distance separating the parental stocks. Much of the death was probably caused by age-related damage to the micronucleus. Despite the confounding age-related death, the conclusion that neither species has detectably isolated local populations is supported.


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