Interaction of genotype and environment
The simple additive-dominance model assumes that gene differences contribute independently from one another to variation in the phenotype. We have seen how failure of this assumption can be detected and how departures from the model may be produced by the interaction of non-allelic genes and by the correlation of gene distributions, both of which may be described in terms of appropriate parameters whose values can be estimated from suitable data. As we have developed and used it so far, the additive-dominance model further assumes that gene differences and environmental differences also contribute independently of one another to variation in the phenotype. We must now turn to consider the interaction of gene and environmental differences (or genotype X environment interaction as it is commonly called), how such interaction may arise, and how it can be detected, measured and investigated.
KeywordsChlorophyll Covariance Posite Poss Summing
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