overdominance

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Related to overdominance: Multiple alleles

overdominance

[¦ō·vər′däm·ə·nəns]

(genetics)

Monohybrid heterosis, that is, the phenotype is being more pronounced in the heterozygote than in either homozygote with respect to a specified pair of alleles.

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References in periodicals archive ?

In Boer, Matou and Nubi goats, the 651A/G in exon 2 was suggested as a useful marker for litter size of the second parity, showing an overdominance effect (Wu et al., 2009).

POLYMORPHISM OF INHIBIN A GENE AND ITS RELATIONSHIP WITH LITTER SIZE IN CHINESE INDIGENOUS GOAT

[19] found that epistasis and overdominance were important for heterosis.

Detection of QTLs for Yield Heterosis in Rice Using a RIL Population and Its Testcross Population

The ratio [([H.sub.1]/D).sup.1/2] suggested overdominance gene action in both environments.

Effects of Drought on Morphological Traits in Some Cowpea Genotypes by Evaluating Their Combining Abilities

On the other hand, there was an overdominance effect of the resistance phenotype, with F1 hybrids showing greater resistance than the parental [H.sub.III] line (Figures 6(a), 6(b),and 6(c)).

Trypanosoma cruzi infection in genetically selected mouse lines: genetic linkage with quantitative trait locus controlling antibody response

In 1986, Koroleva studied in a diallel project the seed weight per plant, weight of 1000 barley seeds in [F.sub.1] and [F.sub.2], and in both studied traits gene overdominance was observed.

Genetic study of agronomic traits in barley based diallel cross analysis

Rugby union has become a dour game, with too much emphasis on physical strength and scant reward for the admirable skills of footwork and handling, compounded by the overdominance of the kicker in deciding the result of a large number of games.

Rethink on rugby; & COMMENT DEBATE

The fitness consequences of multiplelocus heterozygosity under the multiplicative overdominance and inbreeding depression models.

Association between self-fertilization rates and the frequency of malformed larvae in farmed populations of the northern scallop Argopecten purpuratus (Lamarck, 1819)/Asociacion entre la tasa de autofecundacion y la frecuencia de larvas malformadas en poblaciones cultivadas del ostion del norte Argopecten purpuratus (Lamarck, 1819)

(262) The overdominance of the Security Service in this process is evident in these rules of nondisclosure.

Covert derogations and judicial deference: redefining liberty and due process rights in counterterrorism law and beyond

Heterosis and overdominance following long-term selection for body weight in Japanese quail.

Rasgos productivos y comportamiento reproductivo de lineas puras o cruzadas de codorniz japonesa

Do extra exercises in order to decrease the overdominance of the quads.

Workouts for skiers and snowboarders

Unlike positive or negative selection, which usually reduce genetic variability, increasing or decreasing the frequency of a particular genetic variant, many types of selection maintain polymorphisms, especially when overdominance, spatially heterogeneous environments, temporally varying environments, or epistasis are occurring.

The evolution of South American populations of Trimerotropis pallidipennis (Oedipodinae: Acrididae) revisited: dispersion routes and origin of chromosomal inversion clines

"Another theory for heterosis, supported by our discovery, postulates that improved vigor stems from only a single gene - an effect called "superdominance" or "overdominance"," he added.