Table 1.
Descriptive statistics of the growth performance traits in crossbred Thai indigenous chickens.
| Traits | Number of Records |
Mean | SD | Min. | Max. | CV (%) |
|---|---|---|---|---|---|---|
| KKU1 chickens | ||||||
| BW0 (g) | 653 | 36.30 | 4.75 | 26.00 | 52.00 | 13.09 |
| BW2 (g) | 646 | 257.75 | 41.30 | 107.00 | 397.00 | 16.02 |
| BW4 (g) | 645 | 717.53 | 100.34 | 329.00 | 978.00 | 13.98 |
| BW6 (g) | 541 | 1240.52 | 170.59 | 760.00 | 1800.00 | 13.75 |
| BrC6 (cm) | 541 | 25.87 | 1.48 | 19.80 | 30.00 | 5.72 |
| ADG0–2 (g/day) | 646 | 15.82 | 2.77 | 5.36 | 25.79 | 17.51 |
| ADG0–4 (g/day) | 645 | 24.33 | 3.54 | 10.43 | 33.57 | 14.55 |
| ADG0–6 (g/day) | 541 | 28.68 | 4.09 | 17.00 | 42.12 | 14.26 |
| KKU2 chickens | ||||||
| BW0 (g) | 666 | 35.81 | 3.90 | 23.00 | 45.00 | 10.89 |
| BW2 (g) | 654 | 193.42 | 28.70 | 101.00 | 263.00 | 14.84 |
| BW4 (g) | 658 | 517.38 | 77.93 | 288.00 | 730.00 | 15.06 |
| BW6 (g) | 658 | 931.31 | 134.60 | 450.00 | 1300.00 | 14.45 |
| BrC6 (cm) | 656 | 22.94 | 1.77 | 18.00 | 28.20 | 7.72 |
| ADG0–2 (g/day) | 654 | 11.25 | 1.95 | 4.57 | 16.43 | 17.33 |
| ADG0–4 (g/day) | 658 | 17.30 | 2.73 | 9.14 | 24.61 | 15.78 |
| ADG0–6 (g/day) | 658 | 21.32 | 3.18 | 9.79 | 30.17 | 14.92 |
BW0 = birth weight (g); BW2, BW4, and BW6 = body weight at 2, 4, and 6 weeks of age (g), respectively; BrC6 = breast circumference at 6 weeks of age (cm); ADG0–2, ADG0–4, and ADG0–6 = average daily gain at 0–2, 0–4, and 0–6 weeks of age (g/day), respectively; KKU1 = crossbred chicken between commercial broiler and synthetic Thai indigenous synthetic chickens (Kaimook e-san1); KKU2 = crossbred chicken between Kaimook e-san2 and Kaimook e-san1 (both of which are Thai indigenous chickens); Mean = average value; SD = standard deviation; Min. = minimum value; Max. = maximum value; CV = coefficient of variation (%).