Table 6.
Posterior means (standard deviation) of genetic correlation estimates between carcass grading traits and unit price vs image analysis traits
| Traits | Carcass graiding traits and unit price | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| CWT | REA | RT | SFT | YS | BMS | UP | |
| M. longissimus dorsi | |||||||
| Area | 0.44 (0.14) | 1.00 (0.00) | 0.42 (0.15) | −0.21 (0.18) | 0.90 (0.04) | 0.70 (0.09) | 0.74 (0.09) |
| Marbling percentage | 0.15 (0.15) | 0.65 (0.09) | 0.42 (0.14) | 0.12 (0.17) | 0.58 (0.10) | 0.98 (0.01) | 0.97 (0.01) |
| New fineness index | 0.26 (0.16) | 0.85 (0.05) | 0.22 (0.17) | −0.18 (0.17) | 0.76 (0.07) | 0.69 (0.09) | 0.75 (0.07) |
| M. semispinalis capitis | |||||||
| Area (cm2) | 0.52 (0.14) | 0.43 (0.15) | 0.40 (0.16) | −0.02 (0.18) | 0.31 (0.16) | 0.12 (0.18) | 0.10 (0.19) |
| M. semispinalis dorsi | |||||||
| Area | 0.32 (0.16) | 0.69 (0.10) | 0.30 (0.17) | −0.14 (0.18) | 0.63 (0.11) | 0.37 (0.15) | 0.51 (0.14) |
| Marbling percentage | −0.15 (0.18) | 0.55 (0.12) | 0.22 (0.14) | 0.00 (0.17) | 0.59 (0.12) | 0.80 (0.07) | 0.88 (0.05) |
| M. trapezius dorsi | |||||||
| Area | 0.32 (0.15) | 0.66 (0.10) | 0.44 (0.15) | 0.00 (0.18) | 0.58 (0.12) | 0.40 (0.14) | 0.53 (0.12) |
| Marbling percentage | 0.12 (0.18) | 0.57 (0.12) | 0.43 (0.14) | 0.29 (0.16) | 0.48 (0.13) | 0.68 (0.09) | 0.66 (0.10) |
| Thickness | 0.30 (0.16) | 0.57 (0.12) | 0.45 (0.14) | 0.14 (0.17) | 0.46 (0.13) | 0.34 (0.14) | 0.46 (0.14) |
| New fineness index | 0.05 (0.20) | 0.60 (0.12) | 0.23 (0.19) | −0.07 (0.18) | 0.58 (0.12) | 0.53 (0.12) | 0.58 (0.12) |
| M. latissimus dorsi | |||||||
| Area | 0.66 (0.09) | 0.60 (0.10) | 0.53 (0.12) | 0.16 (0.16) | 0.34 (0.14) | 0.36 (0.13) | 0.43 (0.13) |
| Marbling percentage | −0.04 (0.19) | 0.48 (0.12) | 0.16 (0.17) | 0.18 (0.17) | 0.42 (0.14) | 0.67 (0.09) | 0.74 (0.08) |
| Thickness | 0.48 (0.12) | 0.52 (0.13) | 0.37 (0.15) | 0.05 (0.18) | 0.34 (0.14) | 0.36 (0.13) | 0.45 (0.13) |
| New fineness index | 0.27 (0.19) | 0.58 (0.14) | 0.38 (0.18) | −0.02 (0.20) | 0.53 (0.15) | 0.64 (0.11) | 0.67 (0.11) |
| Target field | |||||||
| Area | 0.84 (0.06) | 0.62 (0.11) | 0.83 (0.07) | 0.45 (0.15) | 0.34 (0.16) | 0.33 (0.15) | 0.48 (0.15) |
| Thickness | 0.73 (0.11) | 0.42 (0.17) | 0.83 (0.08) | 0.68 (0.12) | 0.10 (0.21) | 0.29 (0.18) | 0.41 (0.18) |
| IF area | 0.38 (0.16) | 0.02 (0.20) | 0.71 (0.11) | 0.40 (0.16) | −0.07 (0.19) | 0.17 (0.18) | 0.19 (0.18) |
| IF area percentage | −0.40 (0.17) | −0.56 (0.15) | 0.10 (0.18) | 0.11 (0.17) | −0.33 (0.17) | −0.09 (0.17) | −0.19 (0.18) |
| SF area | 0.58 (0.11) | −0.02 (0.17) | 0.61 (0.12) | 0.92 (0.03) | −0.39 (0.15) | 0.04 (0.16) | 0.06 (0.17) |
| SF area percentage | 0.31 (0.16) | −0.32 (0.17) | 0.41 (0.15) | 0.95 (0.03) | −0.54 (0.27) | −0.09 (0.16) | −0.09 (0.17) |
IAT, image analysis traits; UP, carcass unit price per 1 kg; CWT, carcass weight; REA, rib eye area; RT, rib thickness; SFT, subcutaneous fat thickness; YS, yield score; BMS, beef marbling standard; IF, intermuscular fat; SF, subcutaneous fat.