Table 2.

Heritability estimates of preference and locomotor phenotypes in AIL mice.

Phenotype	h2 (SE): midparent-offspring regression	h2 (SE): maximum likelihood
D1 preference (s)	0.17 (0.14)	0.00 (0.00)
D8 CPP (s)	0.21 (0.10)	0.00 (0.33)
D8-D1 CPP (s)	0.12 (0.10)	0.00 (0.00)
D1 ACT (cm)	0.34 (0.23)	0.45 (0.33)
D8 ACT (cm)	0.52 (0.21)	0.68 (0.17)
MA-ACT (cm)	0.1 (0.13)	0.00 (0.31)
SAL-ACT(cm)	0.33 (0.19)	0.62 (0.29)

N = 105 (10 dams, 10 sires, 85 offspring). The first column lists the various preference and locomotor measures (ACT). The second column represents the heritability estimates (h2) using midparent-offspring regression of the F45 and F46 generations of AIL mice. The third column represents the heritability estimates obtained when accounting for genetic relatedness using maximum likelihood estimation. SE, standard error of the estimate..