https://orcid.org/0000-0003-2278-8129
Figures & data
Table 1. Number of cows per genetic group according to heterosis coefficient.
Table 2. Quality-of-fit of 305-day milk yield means to Wood (WD), Mixed Log (ML), Morgan (MG) and Wilmink (WL) models.
Table 3. Least mean squares and standard errors for 305-day milk yield (kg) in different non-linear models for Holstein cows (H), Gyr (G), and different genetic groups of the Girolando breed.
Table 4. Estimates of variance components and heritability (h2) of 305-day milk yield (kg) estimated by different nonlinear models.
Table 5. Breed effect with standard error estimated by the Wood (WD), Mixed Log (ML), Morgan (MG), and Wilmink (WL) models.
Figure 1. Estimation of heterosis (kg) for 305-day milk yield (305MY) according to the heterosis coefficient of the different genetic groups of Girolando cows, obtained by the Wood’s model (305MY-WD), Mixed Log function (305MY-ML), Morgan model (305MY-MG) and Wilmink model (305MY-WL).
Table 6. Linear regression of the heterosis curve.
