The study was done in two periods with five generations of Ac chicken at Binh An enterprise, Saigon poultry company. In the first period, three generations were surveyed (0;1;2) with selection index : I=100+0,672xEBVSLT–0,121xEBV NT . In the second period, two generations were studied (3;4) with selection index of male (growth) line for feathered-leg group: $CSCLCSST=0,672xEBVSLT–0,121xEBV NT ; and selection index of female (reproduction) line for non feathered-leg group: $CSCLCSSS=0,672xEBVSLT+1,657 xEBVAN . The application of selection indexes improved the production performance of chicken generation .