complementary genes


Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to complementary genes: epistasis, Multiple alleles

complementary genes

Nonallelic, independently located genes, neither of which will be expressed in the absence of the other.
See also: gene

complementary genes

Genes which, although not alleles, perform similar or opposing functions. Complementary genes may cooperate in the production of an effect or they may tend to oppose its production.
Mentioned in ?
References in periodicals archive ?
Results showed that its resistance to CYR18 and 2E16 are all controlled by three recessive complementary genes, and the results of reciprocal crosses were the same, indicating that the resistance is inherited by nucleus.
Seedling resistance identification showed that there were three recessive complementary genes in Early Premium controlling resistance to 2E16.
Second, and more important, we assume that speciation results from the accumulation of complementary genes and not from "peak shifts" or "transilience events." In short, here as elsewhere (Orr 1995; Turelli and Orr 1995), we attempt to work out the theoretical consequences of the recent experimental findings in the genetics of speciation - findings that strongly suggest that postzygotic isolation results from the fixation of genes having no deleterious effects on their normal genetic backgrounds.
For similar reasons, we believe one must remain skeptical of all theoretical claims about speciation that do not explicitly take into account the mechanism by which hybrid sterility and inviability arise, the accumulation of complementary genes. Although reproductive isolation is almost certainly an "epiphenomenon" of divergence by ordinary population genetic processes, it does not follow that the mathematics describing speciation are identical to those describing divergence under natural selection or genetic drift.
Complementary gene interactions are, of course, well known: in Drosophila melanogaster, for instance, many mutations that are viable "by themselves" are lethal when combined, e.g., pn and Killer-of-pn (Sturtevant 1956).
Identification and recombination of complementary genes at different loci can enable breeders to intentionally construct a phenotype that would not be the predicted outcome of a cross (based on the phenotypes of the parents; Xu, 1989; Xu and Shen, 1992b).
Singh and McIntosh (1984) located two complementary genes Lr27 and Lr31 on respective chromosome arms 3BS and 4BL (previously 4A[Beta]).
Complementary genes for resistance to Puccinia recondita tritici in Triticum aestivum 11.

Full browser ?