overdominance

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Related to Overdominance hypothesis: Outbreeding Enhancement

overdominance

[¦ō·vər′däm·ə·nəns]
(genetics)
Monohybrid heterosis, that is, the phenotype is being more pronounced in the heterozygote than in either homozygote with respect to a specified pair of alleles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
A test of the associative overdominance hypothesis has been recently proposed by Pogson and Zouros (1994) which is based on comparing the effects of heterozygosity at the allozyme and DNA levels on a fitness-related character.
Under inbreeding effects, a significant positive slope is expected, which is not predicted under the overdominance hypothesis (examples in Table 1).
Allozyme and RFLP heterozygosity as correlates of growth rate in the scallop Placopectin Magellanicus: A test of the associative overdominance hypothesis. Genetics 137:221-231.