Table 4.
Estimation of regression equations of the body weights (Y) on the chicks age (X) for Korean native crossbred commercial chickens

Crossbred combination Regression equation R-square Estimated days to reach
850 g 1.9 kg
FHSY Y=0.1070X2+18.5378X—30.8137 0.9238 38.8 73.2
FHYS Y=0.0599X2+25.6601X—59.6423 0.9514 32.9 66.2
FHFY Y=0.0851X2+26.4910X—60.7490 0.9432 31.2 61.7
FHFS Y=0.0860X2+25.3170X—55.7389 0.9330 32.2 63.5
FHHY Y=0.0683X2+28.4267X—64.2089 0.9449 30.0 60.3
HFSY Y=0.0854X2+21.4391X—36.1188 0.9384 36.1 70.5
HFYS Y=0.0366X2+25.8779X—68.3091 0.8919 33.9 69.3
HFFY Y=0.0684X2+28.3265X—73.0575 0.9339 30.4 60.7
HFFS Y=0.0850X2+24.8727X—59.4198 0.9512 32.9 64.5
HFHY Y=0.0886X2+25.9014X—64.3363 0.9313 31.8 62.5
Hanhyup Y=0.1432X2+17.6701X—39.3714 0.9467 38.4 70.0