Table 7.
Summary of stepwise multiple regression analysis evaluating the relationships between production variables and independent variables in TXSB and SB lambs following a 36-d period on an intensive diet immediately prior to slaughter
| Coefficient (SEM) | 95% CI | Contribution to Adjusted R2 | P value | |
|---|---|---|---|---|
| ADG, g/day | ||||
| Intercept | −0.055 (0.0251) | −0.106 to −0.004 | — | <0.0001 |
| Daily intake, g/day | 0.038 (0.0972) | 0.154 to 0.219 | 0.459 | <0.0001 |
| Breed | ||||
| SB | — | — | — | — |
| TXSB | 0.063 (0.0102) | 0.043 to 0.084 | 0.081 | <0.003 |
| Sex | ||||
| Wether | — | — | — | — |
| Ram | 0.186 (0.0162) | 0.019 to 0.058 | 0.034 | <0.01 |
| Cumulative R2 | 0.574 | |||
| Intake, kg/day* | ||||
| Intercept | 0.937 (0.0958) | 0.748 to 1.126 | — | <0.001 |
| Age | 0.054 (0.0091) | 0.036 to 0.072 | 0.136 | <0.001 |
| Breed | ||||
| SB | — | — | ||
| TXSB | 0.219 (0.0387) | 0.143 to 0.296 | 0.123 | <0.001 |
| Cumulative R2 | 0.123 | |||
| FCR† | ||||
| Intercept | 7.095 (0.2322) | 6.638 to 7.552 | — | <0.001 |
| Breed | ||||
| SB | — | |||
| TXSB | −1.557 (0.2693) | −2.087 to −1.027 | 0.145 | <0.001 |
| Sex | ||||
| Wether | — | |||
| Ram | −0.729 (0.2684) | −1.259 to −0.199 | 0.031 | <0.01 |
| Cumulative R2 | 0.176 | |||
*Total Intake (Fresh matter weight) =Total concentrate intake.
†FCR calculated as total feed intake divided by total weight gain.