heterosis


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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)
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.
References in periodicals archive ?
09 in Pekin L-201) which accumulated half of the direct heterosis maintained in G2 and maternal heterosis.
Study of heterosis and combining ability by utilizing cytoplasmic genetic male sterility and fertility restoration system in rice.
Specifically, the evaluation of divergence can identify those crosses that will optimize heterosis while avoiding undesirable features.
The estimates of heterosis (/4) were made using the formula modified from that used by Cruz and Ibarra (1997):
Separation of source of variation of heterosis revealed significant mean heterosis values for all of the traits, indicating that there is sufficient genetic divergence among the inbred lines that were evaluated to allow for genetic improvement.
This suggests that heterosis within these two very small unrelated populations have overcome founder effect in the inbreeding index.
Thus, from the consideration of the pertinent data presented in the graph (Figure-8), a definite pattern emerges on the heterosis concept.
Q = matrix relating observations to breed effect (through H, F, J, and S breed fractions) and general heterosis (through heterozygosity fraction),
The combining ability analysis was done according to Kempthorne [4] and heterosis analysis also done.
As an interspecies hybrid, it has a significant heterosis for growth rate, body size, meat quality and other production performances (Lucottehttp://www.
They also reported that the traits of the Indian and Chinese populations were highly complementary, and expected to show heterosis in between-population crosses.