Table 4.
Genetic associations with lamb survivorship
| Additive model
|
Symmetrical overdominance model
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Locus | Locus term
|
Locus × weight interaction
|
n | d.f. | Heterozygosity term
|
Heterozygosity × weight interaction
|
n | d.f. | ||||
| Δdeviance | P value | Δdeviance | P value | Δdeviance | P value | Δdeviance | P value | |||||
| BM1815 | 0.71 | 0.701 | 0.68 | 0.710 | 414 | 2 | 1.8 | 0.180 | 1.00 | 0.318 | 414 | 1 |
| OLADRB | 3.65 | 0.601 | 12.93 | 0.024 | 509 | 5 | 0.00 | 0.966 | 1.69 | 0.193 | 509 | 1 |
| OLADRBps | 4.07 | 0.539 | 11.58 | 0.041 | 398 | 5 | 0.52 | 0.471 | 0.03 | 0.870 | 398 | 1 |
| OMHC1 | 3.00 | 0.557 | 10.35 | 0.035 | 484 | 4 | 0.63 | 0.428 | 0.78 | 0.378 | 484 | 1 |
| BM1818 | 0.75 | 0.945 | 3.99 | 0.407 | 376 | 4 | 0.21 | 0.650 | 2.11 | 0.146 | 376 | 1 |
Genetic terms were fitted to a minimal model of lamb survivorship under an additive model and a symmetrical overdominance model (see text). Markers within the MHC are shown in italics. Significant values are shown in bold.