Summary: Heredity (1983), 51 (1), 405--413
1983. The Genetical Society of Great Britain
BEHAVIOURAL VARIATION IN
IV. MENDELIAN MODELS AND HERITABILITY
OF A FEEDING RESPONSE IN THE GARTER SNAKE,
FRANK A. AYRES AND STEVAN J. ARNOLD*
University of Oxford, Department of Biomathematics, Pusey Street,
Oxford OX1 2JZ U.K.
Heritability of a feeding response was very similar in two conspecific populations
despite divergence in average behaviour. These results support the view that
genetic variances evolve more slowly than phenotypic means. One locus models
with absolute penetrance gave poor fits to family data from both populations.
There are excellent prospects for applying the theory of quantitative
genetics to the evolution of natural populations. Field workers are increas-
ingly successful at estimating heritabilities and genetic correlations. Recent