heterosis

heterosis

 [het″er-o´sis]

the existence, in the first generation hybrid, of greater vigor than is shown by either parent.

het·er·o·sis

(het'ĕr-ō'sis),

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]

heterosis

/het·er·o·sis/ (het″er-o´sis) the existence, in the first generation hybrid, of greater vigor than is shown by either parent strain.

heterosis

(hĕt′ə-rō′sĭs)

n.

See hybrid vigor.

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het′er·ot′ic (-rŏt′ĭk) adj.

heterosis

[het′ərō′sis]

Etymology: Gk, heteros + osis, condition

the superiority of first-generation hybrid plants and animals with respect to one or more traits when compared with either of the parent strains or with corresponding inbred strains. Also called hybrid vigor.

heterosis

or

hybrid vigour

the superiority of a HYBRID produced from crossing two different types of parent with one or more inferior characteristics. For example, two different inbred lines of cereals when crossed together can produce hybrids with a far higher yield and general vigour than either parental line.

heterosis

the existence, in the first generation hybrid, of greater vigor than is shown by either parent.