Table 3.
Regression equations predicting liveweight (LW) from heart girth (HG) of cross-bred dairy cattle in smallholder farms in Western Kenya
| Breed category | Regression equation | R2 | RSD |
|---|---|---|---|
| 40–60 % exotic | LW = 3.562HG − 290.44 | 0.59 | 29.36 |
| 61–80 % exotic | LW = 3.880HG − 328.94 | 0.72 | 30.98 |
| >80 % exotic | LW = 5.257GH − 541.66 | 0.73 | 34.76 |
| Heifers | LW = 3.4262HG − 284.33 | 0.76 | 22.78 |
| Mature cows | LW = 4.4721HG − 419.37 | 0.67 | 33.17 |
| Overall equation | LW = 4.277HG − 393.13 | 0.71 | 25.65 |
| Overall with BL | LW = 3.367HG + 0.737BL − 342.6 | 0.65 | 29.73 |
| Overall with BCS | LW = 2.76HG + 27.80BCS − 247.5 | 0.73 | 26.0 |
| Overall equation with genotype | LW = 4.147HG + 11.78Gen2 + 11.95Gen3 − 380.9 | 0.71 | 31.9 |
RSD residual standard deviation