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Meta-Analyses of the Association Between Multilocus Heterozygosity and Fitness

Hugh B. Britten
Evolution
Vol. 50, No. 6 (Dec., 1996), pp. 2158-2164
DOI: 10.2307/2410687
Stable URL: http://www.jstor.org/stable/2410687
Page Count: 7
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Meta-Analyses of the Association Between Multilocus Heterozygosity and Fitness
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Abstract

Meta-analyses of published correlation coefficients between multilocus heterozygosity (MLH) and two fitness surrogates, growth rate and fluctuating asymmetry, suggested that the strength of these correlations are generally weak. A variety of plants and animals was included in the meta-analyses. A statistically homogeneous group of MLH-growth rate correlation coefficients that included both plants and animals yielded a common correlation of rz = 0.133. A common correlation of rz = -0.170 was estimated for correlations between MLH and fluctuating asymmetry in three species of salmonid fishes. These results suggest that selection, including overdominance, has at most a weak effect at allozyme loci and cast some doubt on the widely held notion that heterozygosity and individual fitness are strongly correlated.

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