heterosis(redirected from Outbreeding Enhancement(Heterosis))
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the existence, in the first generation hybrid, of greater vigor than is shown by either parent.
The beneficial effect on the phenotype of crossing (hybridization) on growth, vigor, and physical or mental qualities in a strain of plants or in animal stock, as measured by the difference between the midparent mean phenotype and that of F1; also referred to as hybrid vigor.
[hetero- + -ōsis, condition]
See hybrid vigor.
het′er·ot′ic (-rŏt′ĭk) adj.