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[Late Greek heterōsis, alteration, alteration of Greek heteroiōsis, from heteroioun, to alter, from heteroios, different in kind, from heteros, other; see hetero-.]

het′er·ot′ic (-rŏt′ĭk) adj.


(Biology) biology another name for hybrid vigour
[C19: from Late Greek: alteration, from Greek heteroioun to alter, from heteros other, different]


(ˌhɛt əˈroʊ sɪs)

the increase in growth, size, yield, or other characters in hybrids over those of the parents.
[1910–15; < Late Greek hetérōsis an alteration. See hetero-, -osis]


abnormal development, especially increased size, in plants or animals, usually as a result of cross-breeding.
See also: Animals, Plants
abnormal development, especially increased size, in plants or animals, usually as a result of crossbreeding.
See also: Size
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.heterosis - (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent
tendency, inclination - a characteristic likelihood of or natural disposition toward a certain condition or character or effect; "the alkaline inclination of the local waters"; "fabric with a tendency to shrink"
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
References in periodicals archive ?
2008) stated that the two main reasons for applying crossbreeding are: 1) to utilize the different additive genetic levels between breeds to generate offspring with better economic ability caused by new combinations of additive genetic components, and 2) make use of heterosis.
Heterosis from crossbreeding may result in attaining both high meat quality and growth performance of the animals.
Quantitatively, heterosis is measured by the difference between the value obtained in generation Ft and the mean value of the parents, being maximum in generation [F.
The genome methylation, demethylation and hypermethylation levels were positively correlated with heterosis in rice.
The hybridization of cultivars that demand a short day photoperiod with those that are day neutral could create progenies with high genetic variation and increased heterosis.
In groundnut, heterosis cannot be exploited for higher production through commercial hybrids due to cleistogamous nature of flower and poor seed recovery during hybridization.
They are important tools to identify possible groups with a higher degree of heterosis in future crosses, and to find sources of resistance to diseases.
2007), y la evaluacion y seleccion de lineas en generaciones tempranas (S3) y/o generaciones avanzadas (S10) que permiten encontrar la mejor combinacion hibrida para explotar la heterosis.
One of the problems in using heterosis in cotton involves defining a selection strategy of parents those ultimately will produce superior hybrids.
Estimates of heterosis in faba bean were reported to be significantly positive or negative when hybrids were compared to mid or better parents [2, 3, 4, 5, 6,7,8].
The aim of the proposed project is to produce and offer to both private and public wheat breeding programs information and/or hybrid wheat seeds obtained from selected crosses found to possess great potentials for the expression of heterosis (hybrid vigor) for grain weight and size.