Table 4.
Number of animals, mean and standard deviation, and heritability estimates for weight gain and growth curve parameter traits of Korean native chicken
| Trait1) | n | Mean±SD | Va | Ve | h2±SE |
|---|---|---|---|---|---|
| GR0–2 | 578 | 105.36±23.49 | 102.77 | 121.68 | 0.458±0.117 |
| GR2–4 | 584 | 122.88±48.84 | 179.90 | 497.08 | 0.266±0.098 |
| GR4–6 | 584 | 161.22±66.29 | 164.87 | 859.48 | 0.161±0.078 |
| GR6–8 | 583 | 180.44±71.82 | 406.03 | 1,334.34 | 0.233±0.090 |
| GR8–10 | 581 | 160.32±69.04 | 352.10 | 3,667.61 | 0.088±0.058 |
| GR10–12 | 582 | 223.75±93.35 | 336.88 | 5,453.45 | 0.058±0.056 |
| GR12–14 | 582 | 188.05±90.38 | 246.74 | 5,626.51 | 0.042±0.046 |
| GR14–16 | 576 | 209.20±77.20 | 584.16 | 3,964.95 | 0.128±0.067 |
| GR16–18 | 582 | 206.44±109.64 | 326.57 | 4,537.18 | 0.067±0.050 |
| GR18–20 | 583 | 191.15±72.89 | 258.98 | 4,314.20 | 0.057±0.052 |
| α | 575 | 2,178.9±528.1 | 0.005 | 0.019 | 0.211±0.084 |
| β | 568 | 19.49±8.09 | 0.010 | 0.029 | 0.249±0.091 |
| γ | 565 | 0.230±0.032 | 6.16e-05 | 5.84e-04 | 0.095±0.060 |
n, number of animals analyzed; Mean±SD, mean with standard deviation; Va, additive genetic component; Ve, residual variance component; h2±SE, heritability with standard error.
GR0–2, weight gain from hatch to 2 weeks of age; GR2–4, weight gain from 2 to 4 weeks of age; GR4–6, weight gain from 4 to 6 weeks of age; GR6–8, weight gain from 6 to 8 weeks of age; GR8–10, weight gain from 8 to 10 weeks of age; GR10–12, weight gain from 10 to 12 weeks of age; GR12–14, weight gain from 12 to 14 weeks of age; GR14–16, weight gain from 14 to 16 weeks of age; GR16–18, weight gain from 16 to 18 weeks of age; GR18–20, weight gain from 18 to 20 weeks of age; α, asymptotic live body weight (gram); β, inflection point at which 50% of the asymptotic weight is realized (wk), γ, a constant scale that is proportional to the overall growth rate (wk).