Table 6 Accuracy and bias of genomic predictions using cows of one breed to predict cows of the other breed and the relationship matrix based on the whole set of 71,726 SNPs (G W ) or the SNPs with effect estimates with the same sign in the two breeds (G S ) or the SNPs with effect estimates with different signs in the two breeds (G D )
Trait | BB cows: TC cows | TC cows: BB cows | ||||
|---|---|---|---|---|---|---|
G W | G S | G D | G W | G S | G D | |
Accuracy | ||||||
Navel score | 0.40 | 0.70 | −0.47 | 0.14 | 0.58 | −0.60 |
Coat score | 0.11 | 0.64 | −0.54 | 0.07 | 0.53 | −0.57 |
Coat colour | 0.05 | 0.65 | −0.62 | 0.13 | 0.67 | −0.66 |
Body condition | 0.20 | 0.55 | −0.48 | 0.20 | 0.65 | −0.57 |
Yearling weight | 0.07 | 0.45 | −0.43 | 0.09 | 0.43 | −0.38 |
Average | 0.17 | 0.60 | −0.51 | 0.13 | 0.57 | −0.56 |
Bias | ||||||
Navel score | 1.65 | 1.48 | −2.00 | 0.61 | 1.12 | −2.03 |
Coat score | 0.92 | 3.77 | −3.16 | 0.28 | 0.76 | −1.01 |
Coat colour | 0.42 | 2.29 | −2.49 | 0.83 | 1.24 | −1.38 |
Body condition | 1.42 | 1.46 | −1.85 | 1.22 | 2.04 | −2.27 |
Yearling weight | 0.57 | 1.61 | −1.72 | 0.73 | 1.56 | −1.70 |
Average | 1.00 | 2.12 | −2.24 | 0.73 | 1.35 | −1.68 |