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

(hĕt′ə-rō′sĭs)
het′er·ot′ic (-rŏt′ĭk) adj.

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.
References in periodicals archive ?
Then it is not to be surprised that Jersey x Holstein cows had lower vaginal temperatures during much of the day than Holstein or Jerseys suggests that thermotolerance is another trait controlled by heterosis (Dikmen et al., 2009).
Heterosis in different crosses of wheat (Triticum aestivum L.).
Our results and the results from other researchers support the scope of heterosis breeding or the exploitation of hybrid vigour in sunflower breeding.
The mean value of the OPV check was used to calculate the standard heterosis. The parent with the highest mean value was used as better parent in the calculation of high-parent heterosis while the average between the two parents was used for the mid-parent heterosis.
Diallel analysis of combining ability and heterosis for yield and yield components in rice by using positive loci.
This study is aiming to detect and evaluate QTLs controlling grain yield and its component traits using datasets of the RILs, testcross [F.sub.1]s, and the mid-parent heterosis and to analyze the genetic basis of heterosis in rice.
Heterosis over mid parent value (MP) as per Turner, 1953, Heterosis over better parent (BP) as per Fonseca and Patterson, 1968 and Standard heterosis (SH) using standard check as per Meredith and Bridge, 1972 were calculated.