Heritability reactive

I., et al. (2000) Reactivation of heritably silenced gene expression in mice. Mamm Genome 11, 347-355. 

Connolly (1966) has selectively bred Drosophila for level of spontaneous locomotor activity. The directional selection imposed resulted in an extremely inactive line and a highly active one. It has been established by Connolly (1967) that the principal phenotypic difference between the strains was spontaneous activity and not reactivity to environmental stimuli. The genetic system involved in the expression of phenotype is polygenic and the character has a heritability of 0.51 + 0.10. The concentrations of biogenic amines were assayed in the two selected strains and in an unselected, control strain (Tunnicliff et al., 1969). Dopamine concentrations were maximal in the inactive line and lowest in the active, the control strain having an intermediate dopamine... 

Ouellet-Morin, I., Boivin, M., Dionne, G., Lupien, S. J., Arsenault, L., Barr, R. G., Perusse, D., Tremblay, R. E. (2008). Variations in heritability of cortisol reactivity to stress as a function of early familial adversity among 19-month-old twins. Arch. Gen. Psychiatry. 65 211—218. 

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