Table 1 Phenotypic variances and proportions of phenotypic variance explained by dam, service sire, and maternal effects for total number born (TNB) and number born alive as a proportion of TNB (NBA/TNB), with standard errors in parentheses

Phenotypic variance

\({{\upsigma }}_{p}^{2}\)

9.218

0.014

Dam (genetic)

\({{\upsigma }}_{u}^{2}\)/\({{\upsigma }}_{p}^{2}\)

0.097 (0.003)

0.115 (0.008)

Service sire

\({{\upsigma }}_{v}^{2}\)/\({{\upsigma }}_{p}^{2}\)

0.053 (0.053)

0.023 (0.002)

Dam (non-genetic)

\({{\upsigma }}_{w}^{2}\)/\({{\upsigma }}_{p}^{2}\)

0.071 (0.003)

0.000 (0.000)