Table 3.
Parameter estimates, goodness of fit statistics, and correlations between predictions made by different methods obtained for milk technological properties when models were fitted to the entire data set, by trait and model1
| Trait2 and model | Variance
|
R2 | DIC | pD/Terms | Correlations between predictions of different models
|
||||
|---|---|---|---|---|---|---|---|---|---|
| Phenotypic | Residual | MPLS | Bayes RR | Bayes A | Bayes B | ||||
| RCT | 32.57 | ||||||||
| PLS | 15.49 | 0.53 | — | 14 | 0.92 | 0.92 | 0.92 | 0.87 | |
| MPLS | 12.69 | 0.61 | — | 15 | — | 0.96 | 0.96 | 0.94 | |
| Bayes RR | 8.35 | 0.75 | 6,534 | 179 | — | — | 0.99 | 0.97 | |
| Bayes A | 8.82 | 0.73 | 6,513 | 138 | — | — | — | 0.98 | |
| Bayes B | 8.71 | 0.73 | 6,333 | 60 | — | — | — | — | |
| CYCURD | 3.57 | ||||||||
| PLS | 1.00 | 0.72 | — | 14 | 0.97 | 0.98 | 0.98 | 0.96 | |
| MPLS | 0.92 | 0.74 | — | 11 | — | 0.98 | 0.99 | 0.98 | |
| Bayes RR | 0.74 | 0.79 | 3,405 | 118 | — | — | 1.00 | 0.98 | |
| Bayes A | 0.72 | 0.80 | 3,335 | 107 | — | — | — | 0.99 | |
| Bayes B | 0.67 | 0.81 | 3,175 | 72 | — | — | — | — | |
| RECPROTEIN | 5.81 | ||||||||
| PLS | 2.69 | 0.54 | — | 15 | 0.89 | 0.87 | 0.87 | 0.84 | |
| MPLS | 1.85 | 0.68 | — | 16 | — | 0.95 | 0.95 | 0.94 | |
| Bayes RR | 1.06 | 0.82 | 4,029 | 210 | — | — | 0.99 | 0.98 | |
| Bayes A | 1.14 | 0.81 | 4,050 | 179 | — | — | — | 0.98 | |
| Bayes B | 1.08 | 0.81 | 3,844 | 110 | — | — | — | — | |
| RECFAT | 12.84 | ||||||||
| PLS | 9.44 | 0.27 | — | 10 | 0.89 | 0.95 | 0.91 | 0.88 | |
| MPLS | 8.79 | 0.32 | — | 9 | — | 0.93 | 0.93 | 0.94 | |
| Bayes RR | 7.71 | 0.41 | 6,209 | 104 | — | — | 0.97 | 0.95 | |
| Bayes A | 7.57 | 0.42 | 6,152 | 88 | — | — | — | 0.96 | |
| Bayes B | 7.48 | 0.42 | 6,079 | 59 | — | — | — | — | |
PLS = partial least squares regression; MPLS = modified partial least squares regression, Bayes RR = Bayes ridge regression; R2 = coefficient of determination calculated as the square of the correlation between observed and predicted values; DIC = deviance information criterion; pD/Terms = effective number of parameters/number of MPLS or PLS terms.
RCT = rennet coagulation time, min; CYCURD = cheese yield, weight of fresh curd as a percentage of the milk processed by weight; RECPROTEIN = recovery of protein, protein of the curd as a percentage of the protein of the milk processed; RECFAT = recovery of fat, fat of the curd as a percentage of the fat of the milk processed.