Table 2.
Estimates of TM-QTL genotypea contrasts (and standard errors) and significance levels (P-value) for additive, dominance, reciprocal, and paternally derived polar overdominant effects on loin dimensionsb and spine traits.c
| Trait | Additive |
Dominance |
Reciprocal heterozygote |
Polar overdominance |
||||
|---|---|---|---|---|---|---|---|---|
| Contrast | P-value | Contrast | P-value | Contrast | P-value | Contrast | P-value | |
| CT_MLL_W_LWT | 1.767 (0.736) | <0.05 | 1.184 (1.151) | 0.31 | 1.368 (0.893) | 0.13 | 3.919 (1.698) | <0.05 |
| CT_MLL_D_LWT | 1.496 (0.697) | <0.05 | 1.142 (1.090) | 0.30 | 1.032 (0.847) | 0.22 | 3.207 (1.609) | <0.05 |
| CT_MLL_A_LWT | 118.9 (46.92) | <0.05 | 15.90 (73.38) | 0.83 | 131.5 (56.98) | <0.05 | 279.0 (108.3) | <0.05 |
| VNTHOR | 0.186 (0.080) | <0.05 | −0.032 (0.126) | 0.80 | −0.243 (0.097) | <0.05 | −0.518 (0.185) | <0.01 |
| VNLUM | −0.213 (0.092) | <0.05 | −0.001 (0.144) | 0.99 | 0.275 (0.112) | <0.05 | 0.550 (0.212) | <0.05 |
| SPLLUM_LWT | −5.321 (2.531) | <0.05 | −1.857 (3.958) | 0.64 | 8.675 (3.073) | <0.01 | 15.49 (5.840) | <0.01 |
LWT, live weight (kg) fitted as a covariate in model.
+S/+D, homozygote non-carrier; TMS/+D, heterozygote carrier inheriting TM-QTL from sire; +S/TMD, heterozygote carrier inheriting TM-QTL from dam; TMS/TMD, homozygote carrier.
CT_MLL_W, width of M. longissimus lumborum (mm); CT_MLL_D, depth of M. longissimus lumborum (mm); CT_MLL_A, area of M. longissimus lumborum (mm2).
VNTHOR, number of thoracic vertebrae; VNLUM, number of lumbar vertebrae; VNT+L, number of thoracolumbar vertebrae; SPLTHOR, length of thoracic spine region (mm); SPLLUM, length of lumbar spine region (mm); SPLT+L, length of thoracolumbar spin region (mm); VLTHOR, average length of individual thoracic vertebrae (mm); VLLUM, average length of individual lumbar vertebrae (mm); VLT+L, average length of individual thoracolumbar vertebrae (mm).