Table 2. Bone integrity and bird performance traits recorded in the broiler line andcorresponding abbreviations used.
| Trait | Abbreviation |
|---|---|
| Bone integrity traits | |
| Tibia length | LG_TIB |
| Thickness of the tibia | THK_TIB |
| Femur length | LNG_FEM |
| Thickness of the femur | THK_FEM |
| Curvature of the femur | SCORE |
| Force required to break the femur | FEM_FORCE |
| Length of the femoral break | FEM_LNG |
| Area of the femoral break | FEM_AREA |
| Force required to break the tibia | TIB_FORCE |
| Length of the tibial break | TIB_LNG |
| Break area of the tibia | TIB_AREA |
| Dry matter content of the femur | FEM_DM |
| Dry matter content of the tibia | TIB_DM |
| Ash content of the femur | FEM_ASH |
| Ash content of the tibia | TIB_ASH |
| Performance traits | |
| Weight at hatching | WHTC |
| Weight at 21 days of age | W21 |
| Weight at 35 days of age | W35 |
| Weight at 41 days of age | W41 |
| Weight at 42 days of age | W42 |
| Feed intake 35 to 41 days of age | FI35_41 |
| Weight gain 35 to 41 days of age | WG35_41 |
| Feed conversion 35 to 41 days of age | FC35_41 |
Weight in grams; thickness, distance and length in centimeters; force in kgf/mm2.