At the end of the experimental period, 9 ducks whose body weight were similar to the group mean (3 pens with 3 birds sampled per pen) were selected and weighed individually. They were carefully transferred to plastic crates and brought to the slaughter house. The ducks from different genotypes were slaughtered under similar conditions to minimize any other factors influencing the meat qualities. Feed was withdrawn 12 h before slaughter. They were sacrificed by neck cut, scalded with hot water (60°C for 3 min), and feathers removed mechanically. Carcasses were eviscerated manually and portioned into commercial cuts such as neck, breast, leg and wing. The breasts were immediately chilled for 30 min in ice water and transferred to icebox and then prepared separately for further analyses. All animal care procedures were approved by Institutional Animal Care and Use Committee in Konkuk University