- Factors in phenotypic variations
Factors in phenotypic variation consist of: Variation in phenotype (Vp); Variation in phenotypes caused by genetic variation (Vg); Variation of phenotype caused by environment (Ve); Variation in phenotype caused by interaction of genotype and environment (Vgxe). In addition to the above factors, phenotypic variation is also influenced by effects of genotype on phenotypes.
- Additive genetic variation formula shows that Va is influenced by phenotypes (p), additive (a) and dominance (d). As population evolves, the values of p, a, and d change. Consequently, Va value also changes. Based on the narrow sense heritability formula, change in Va ...