Table 3.
Estimates of heritability, standard deviations and common environment variance ratios for different traits.
| Trait | σ a | σ c | h2 (S.E) | C2 (S.E) |
|---|---|---|---|---|
| BW01(Kg)1 | 0.0045 | 2.99 | 0.00(0.00) | 0.43(0.06) |
| BW17(Kg)1 | 18.25 | 17.11 | 0.12(0.20) | 0.11(0.08) |
| BW40(Kg) | 99.60 | 36.36 | 0.32(0.22) | 0.04(0.07) |
| BW60(Kg) | 241.17 | 41.13 | 0.39(0.26) | 0.01(0.08) |
| BW80(Kg) | 396.29 | 0.06 | 0.42(0.12) | 1.09E-08(0.00) |
| BW120(Kg) | 652.68 | 0.04 | 0.40(0.12) | 1.86E-09(0.00) |
| PBM(%) | 0.39 | 7.11E-10 | 0.30(0.10) | 1.36E-09(0.00) |
| BrL(mm) | 5.51 | 4.80E-06 | 0.15(0.06) | 2.37E-08(0.00) |
| BrW(mm) | 3.30 | 1.12E-07 | 0.17(0.07) | 1.73E-09(0.00) |
| PDL(%) | 0.40 | NI | 0.12(0.06) | NI |
| pHu | 0.03 | NI | 0.09(0.04) | NI |
| L* | 0.90 | NI | 0.27(0.09) | NI |
| a* | 0.54 | NI | 0.30(0.09) | NI |
| b* | 0.30 | NI | 0.15(0.05) | NI |
| Aswt(Kg) | 737.68 | 0.07 | 0.30(0.10) | 2.67E-09(0.00) |
| tmid(day) | 0.80 | 0.00021 | 0.05(0.04) | 3.44E-09(0.00) |
| scale(day) | 0.41 | 0.00037 | 0.11(0.06) | 8.99E-08(0.00) |
σ a = Additive genetic standard deviation; σ c = common environment standard deviation; h2 (S.E) = heritability estimates with standard errors (S.E); c2 (S.E) = common environment variance ratio with standard errors (S.E); BW01, BW17, BW40, BW60, BW80, and BW120 are the BW at days 1,17, 40, 60, 80, and 120 of age; PBM = percentage breast meat at 20 wk of age; BrL = breast length at 20 wk of age; BrW = breast width at 20 wk of age; PDL = percent drip loss at 20 wk of age; pHu = ultimate pH at 20 wk of age; L* = lightness at 20 wk of age; a* = redness at 20 wk of age; b* = yellowness at 20 wk of age; Aswt = upper asymptote (estimated growth curve parameter); tmid = inflection point at 50% asymptote (estimated growth curve parameter); scale = constant that is proportional to the overall growth rate (estimated growth curve parameter). NI = Not Included (common environment) in the analysis for the trait. 1 = Full model with common environment effect was found significantly different from the reduced model for these traits; P < 0.05.