Additive Genetic Variance
Variety 2
always outperforms Variety 1 over
the complete range of environmental conditions (e.g., nutient-poor
soil, or with added
fertilizer). The relative response is predictable from experiments in
any environment. Variety 2
may be described as "genetically
superior" to Variety 1. Note however
that Variety 1 in a good
environment outperforms Variety 2 in a poor
environment, if the difference in quality is 30 points or more.