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THE DISTRIBUTION OF INDIVIDUAL HETEROZYGOSITY IN NATURAL POPULATIONS
Jeffry B. Mitton 1 and Benjamin A. Pierce 2
1 Department of Environmental, Population University of Colorado, Boulder, Colorado 80309
2 Department of Organismic Biology, University of Colorado, Boulder, Colorado 80309
Estimation of the distribution of the level of individual heterozygosity within natural populations is explored with both Monte-Carlo simulation studies and data from natural populations. Simulations indicate that heterozygosities estimated from as few as a dozen randomly chosen loci may, to some degree, reflect (r = 0.35) heterozygosity determined by 100 independent loci. The shape of the expected distribution of heterozygosity is heavily dependent upon levels of heterozygosity at the loci. Complete genetic data for 12 loci from 997 Fundulus heteroclitus are used to describe the distributions of heterozygosity for different localities, for age classes and for sexes. The distributions deviate from normality. Distributions from different localities are not different, but the distributions are heterogeneous among age classes at one of two localities and are heterogeneous between the sexes.
Submitted on April 12, 1980Revised on July 8, 1980
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