What is mutational variation?
What is mutational variation?
From Genetics Home Reference. Learn more. A gene variant is a permanent change in the DNA sequence that makes up a gene. This type of genetic change used to be known as a gene mutation, but because changes in DNA do not always cause disease, it is thought that gene variant is a more accurate term.
What does genotypic variance mean?
Genotypic variation is the difference between individuals of the same species or between two different species. Since each individual has a different blueprint, there are many ways to compare genotypes, which means there is a lot of genotypic variation.
How do you calculate mutational variance?
For each response variable, the per‐generation increase in genetic variance due to mutation (mutational variance, V m) was calculated as V m = V l 2 t , where V l is the among‐line variance and t is the number of generations of divergence (Lynch & Walsh, 1998).
Is all phenotypic variation heritable?
Misconceptions of the Heritability Concept al., 2008). Heritability is not the proportion of a phenotype that is genetic, but rather the proportion of phenotypic variance that is due to genetic factors.
What is non additive genetic variance?
Introduction. Non-additive genetic variation results from interactions between genes. Interactions between genes at the same locus are called dominance, and interactions between genes at different loci are called epistasis.
What is phenotypic coefficient of variation?
Phenotypic coefficient of variation (PCV) and genotypic coefficient variation (GCV) estimates indicated the existence of the significant amount of variability among the genotypes for all the studied characters (Table 1).
How do you calculate phenotypic coefficient of variation?
The mean values were used for genetic analyses to determine phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV), according to Singh and Chaudhury [21] as: GCV ( % ) = δ 2 g x × 100 PCV ( % ) δ 2 p x × 100 where: δ2g = genotypic variance, δ2p = phenotypic variance and x = sample mean.
