Allard, R W, and Bradshaw, A D. 1964. Implications of genotype-environment interaction in applied plant-breeding. Crop Set, 4, 503–508. Finlay, K W. 1963. Adaptation—its measurement and ...

In particular, the phenomenon known as overdominance occurs when a heterozygote has a more extreme phenotype than that of either of its parents. Indeed, in a few examples, a trait that shows ...