GENOTYPE-BY-ENVIRONMENT INTERACTION AND THE GENETIC COVARIANCE BETWEEN ENVIRONMENTS - MULTILOCUS GENETICS

Explicit multi-locus expressions for the genetic variance of a phenotypically plastic trait over a range of environments are derived. The link becomes apparent between the genetic covariance, the genotype-by-environment interaction variance and the variance for the main effect 'genotype' in a two-factor analysis of variance over two environments and many known genotypes. The genetic correlation can be +1 even if the genotype-by-environment interaction variance is greater than zero. © 1990 Kluwer Academic Publishers.