Age-dependent allozymic variation in a natural population of lizards |
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Authors: | Donald W. Tinkle Robert K. Selander |
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Affiliation: | (1) Museum and Department of Zoology, University of Michigan, Ann Arbor, Michigan;(2) Department of Zoology, University of Texas, Austin, Texas |
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Abstract: | An analysis of allozymic variation at 17 loci in a population of the sagebrush lizard (Sceloporus graciosus) in southern Utah yielded an estimate of genic heterozygosity of 0.028. Seven of the loci were variable, but only one, Est-1, was strongly polymorphic. The observation that the frequency of the common genotype (MM) at the Est-1 locus declined monotonically in successive age classes from 0.74 in hatchlings to 0.58 in adults 4 years old or older suggests that allele frequencies at this locus are not independent of selective influences.This research was supported by NSF grant GB-29141 to D.W.T. and NIH grant GM-15769 to R.K.S. |
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