overdominant


Also found in: Dictionary, Encyclopedia.

o·ver·dom·i·nant

(ō'vĕr-dom'i-nănt),
Denoting heterozygous states that exhibit overdominance.

o·ver·dom·i·nant

(ō'vĕr-dom'i-nănt)
Denoting heterozygous states that exhibit overdominance.
References in periodicals archive ?
In case of four irrigations seedcotton yield also inherited as an overdominant trait as the average degree of dominance [H1AD]1/2=1.
Nestle has offered concessions to ease fears it would be overdominant in the US premium ice cream segment.
Furthermore, it is important that presentation and debate involve the whole board and are not solely channelled through an overdominant chief executive.
The actions for the three regulatory QTLs identified from height plasticity were overdominant, that is, the plasticity of the heterozygotes transcended the range of the two homozygotes (see Wu 1997).
The executive's capacity for intimacy can be squeezed out by the overdominant striving for mastery.
Polar overdominant inheritance of a DLK1 polymorphism is associated with growth and fatness in pigs.
In the case of haploid organisms such as bacteria, balancing selection would take the form of frequency-dependent selection rather than overdominant selection.
This was a better performance than the Beethoven much bolder and more decisive and with more character, although the piano was perhaps a little overdominant.
Both the overdominant effect and the lower asymmetry in the interspecific hybrids than the parental species suggest allele complementation in the hybrids.
4), which should be expected based on estimates of overdominant gene action for grain yield from the genotypic covariance component estimates used to make these predictions (Edwards and Lamkey, 2002).
In outcrossing populations, mildly and highly deleterious mutations and polymorphisms for overdominant alleles may all contribute to inbreeding depression, while in highly selfing populations, mildly deleterious recessive mutations are expected to be the main cause of inbreeding depression, because of the purging of highly deleterious alleles (D.