additive genetic variance coefficient的用法和样例：
- Only the additive genetic variance is transmissible by seed.
- The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602.
- Only the additive genetic variance is transmissible by seed
- A sire and dam model and a sire and maternal grandsire model are fitted for weight at birth and weight at weaning of sheep to estimate the direct genetic and maternal additive genetic variances.