The phenotypic correlates and quantitative genetics of masculinization in the rodent, Octodon degus

Correction to: Heredity (2017) 119, 136-141; doi:10.1038/hdy.2017.20; published online 12 April 2017

In the above paper we inadvertently omitted the denominator from the weight AIC estimate: the estimator in the paper is given as , where β_i is the (co)variance estimate for the ith model. The correct model is where R is the number of models that contain the relevant parameter. This correction slightly changes the values given in Table 5 but does not in any way affect the conclusions.

Table 5. (Co)variance and heritability estimates (s.e. in parentheses) for the model(s) with the lowest AIC (shown in bold font).

Model	Female				Male
	Birth wt	AGD at birth	Weaning wt	AGD at weaning	Birth wt	AGD at birth	Weaning wt	AGD at weaning
(Co)variances
Va	0.77 (0.35) 0.75 (0.35)	0.50 (0.23) 0.41 (0.24)	0.28 (0.17) 0.34 (0.20)	0.04 (0.06) 0.04 (0.04)	0.29 (0.17) 0.30 (0.19)	0.06 (0.06)	0.52 (0.24) 0.52 (0.24)	0.43 (0.30) 0.47 (0.25)
Vm	0.46 (0.18) 0.39 (0.23)	0.36 (0.13) 0.17 (0.14)	0.05 (0.17)	0.01 (0.03)	0.16 (0.08) 0.14 (0.15)	0.10 (0.05) 0.08 (0.08)	0.47 (0.15) 0.46 (0.22)	0.55 (0.35) 0.37 (0.26)
Covam	−0.53 (0.22) −0.49 (0.22)	−0.31 (0.15) −0.29 (0.14)	−0.08 (0.08)	−0.04 (0.02)	0.10 (0.12)	0.03 (0.05)	0.02 (0.21)	−0.48 (0.37) −0.45 (0.20)
Vc	0.14 (0.08)	0.04 (0.02)	0.46 (0.14) 0.47 (0.16)	0.01 (0.01)	0.16 (0.08) 0.15 (0.05)	0.10 (0.05) 0.08 (0.04)	0.47 (0.15) 0.47 (0.10)	0.17 (0.06)
Heritabilitiesa
	0.22 (0.20)	0.17 (0.16)						−0.004 (0.39)
			0.29 (0.16)	0.05 (0.08)	0.38 (0.20)		0.48 (0.20)
					0.20 (0.10)	0.13 (0.05)	0.43 (0.11)

Abbreviations: AGD, anogenital distance; AIC, Akaike information criterion; Cov_am, covariance between V_a and V_m; V_a, additive genetic variance; V_c, common environmental variance; V_m, additive maternal genetic variance; wt, weight.

^a: total additive heritability; : direct additive heritability; : direct additive maternal heritability.

In males two models (V_a+V_m, V_a+V_c) have the same lowest AIC for birth weight and weaning weight: in these models V_a did not differ between the two and V_m=V_c. Estimates of (co)variances based on full model averaging are shown in italics.

The summed Akaike weights for birth weight in males was erroneously reported, the correct values being 0.923 for V_a, 0.507 for V_m, 0.149 for Cov_am and 0.381 for V_c. The only change in interpretation is that there is now strong evidence for additive genetic variance for both birth weight and weaning weight in males as was also found in females.

The html and online PDF versions have also been rectified, and now carry the corrected paper.