additive genes

additive genes

those in which more than one gene controls a character, with each allele making a definite and measurable contribution towards the character; there is no DOMINANCE between alleles of one gene and no EPISTASIS between different loci (see LOCUS). Many pigment systems are controlled by additive genes, producing a wide spread of variability.
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The additive genes are more important than dominant genes for higher grain production (Aliu et al.
2010) found significance of GCA and SCA suggesting the importance of additive as well as dominant genes, nevertheless the ratio of GCA/SCA was greater than the unity further indicating the preponderance of additive genes over the dominant ones in the inheritance of seed cotton yield, seed index and lint%.
However, it is important to point out that, although the averages of the squares of the non-additive effects for resistance to Xap prevail, the significance and magnitude of the mean squares of the additive effects in the analysis of variance demonstrated higher influence of additive genes in the response to CBB (Table 2), increasing the possibility to achieve genotypes highly resistant to CBB in advanced generations.
Also, bi-parental mating and inter-mate desirable segregates, beside suitable selection to accumulate favorable additive genes could be the proposed methods for improving salt tolerance in safflower.
ij]) measures the effects of non additive genes (CRUZ & REGAZZI, 1994), and some of them had outstanding negative values both 14th-severity and AUDPC (Table 3).
In the present study, days to maturity was showed high heritably with low genetic advance estimates indicate that governed by non additive genes hence heterosis breeding would be recommended for this trait improvement and this research finding was concomitant with Sumathi et al, [39].
Additive gene action: Additive genes are those in which members of a gene pair have equal ability to be expressed.
Combining additive genes for slow rusting type resistance to leaf and stripe rusts in wheat, p.
Although both additive and dominance gene action were found significant in cross PS-Pop-1-1-4 x BD-Pop-1-2-3-3 but the magnitude of dominance was higher than additive genes, showing that trait can be exploited for hybrid production effectively.
2] hybrids may be due to additive genes or incidence of trangressive segregants.
Cyclical selection for a trait controlled by two additive genes with equal effects resulting in sign-concordant environment leads to the following behavior of the system trajectories: in minus-concordant environment any trajectory with [x.