Growth performance, carcass characteristics and meat quality of male chickens were evaluated using eight-week-old 360 cockerels from three exotic (Koekoek, Kuroiler and Sasso-R) and one Ethiopian indigenous (Horro) ge...Growth performance, carcass characteristics and meat quality of male chickens were evaluated using eight-week-old 360 cockerels from three exotic (Koekoek, Kuroiler and Sasso-R) and one Ethiopian indigenous (Horro) genotypes. Cockerels in each breed (90) were randomly allocated into three replications of 30 birds each and housed in deep litter pens for the experiment that lasted for 8 to</span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">16 weeks. The experiment was arranged in a Completely Randomized Design. Seven birds per breed were slaughtered at the end to determine carcass yield, chemical composition and quality attributes of meat. </span><span style="font-family:Verdana;">The Kuroiler breed has higher body weight</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> body weight change (</span><span style="font-family:Verdana;">1621.8 </span><span style="font-family:Verdana;">g)</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> average daily gain (</span><span style="font-family:Verdana;">28.9 g/day),</span><span style="font-family:Verdana;"> daily feed consumption (</span><span style="font-family:Verdana;">127.4 g/day) and better feed conversion ratio (4.40) than other breed</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;">. The Kuroiler breed has heavier </span><span style="font-family:Verdana;">slaughter weight (</span><span style="font-family:Verdana;">2716.3 </span><span style="font-family:Verdana;">g)</span><span style="font-family:Verdana;">,</span><span> </span><span style="font-family:Verdana;">dressed carcass weight (2201.0 g), eviscerated carcass weight (1905.1 g), breast weight (537.7 g), thigh weight (303.1 g) and drumstick weight (274.8 g) than other breeds. Total edible offal was higher </span><span style="font-family:Verdana;">for </span><span style="font-family:Verdana;">Kuroiler (324.2 g) and Sasso-R (306.1 g), intermediate in Koekoek (204.4 g) and low in Horro (152.4 g) breed. The relative proportion of breast and drumstick (% slaughter weight) were lower in Koekoek and Sasso-R (17.3 and 8.9) breeds, respectively. Abdominal fat weight (13.7</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">g and 1.02%) was lowest in Horro. </span><span style="font-family:Verdana;">Sasso-R showed higher percent edible offal weight (</span><span style="font-family:Verdana;">13.4%) than</span><span style="font-family:Verdana;"> Horro breed (</span><span style="font-family:Verdana;">11.4%). The DM content in breast and thigh meat was higher for Horro breed than the rest. The CP content in the breast and thigh meat was lower for the Kuroiler and Koekoek breeds, respectively. Higher EE in the thigh meat was recorded for Sasso-R (8.9%), whereas, EE content in the breast meat was similar (3.4%</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">3.7%) among the breeds. F</span><span style="font-family:Verdana;">lavor</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> tenderness</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> juiciness and general acceptability of breast and thigh meat were not affected by breed. </span><span style="font-family:Verdana;">The highest net return was observed in the Kuroiler breed. </span><span style="font-family:Verdana;">Based on the results obtained</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> it is suggested that </span><span style="font-family:Verdana;">the Kuroiler breed can be used for cockerel meat production in Ethiopia where intensive broiler production is not well developed.展开更多
文摘Growth performance, carcass characteristics and meat quality of male chickens were evaluated using eight-week-old 360 cockerels from three exotic (Koekoek, Kuroiler and Sasso-R) and one Ethiopian indigenous (Horro) genotypes. Cockerels in each breed (90) were randomly allocated into three replications of 30 birds each and housed in deep litter pens for the experiment that lasted for 8 to</span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">16 weeks. The experiment was arranged in a Completely Randomized Design. Seven birds per breed were slaughtered at the end to determine carcass yield, chemical composition and quality attributes of meat. </span><span style="font-family:Verdana;">The Kuroiler breed has higher body weight</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> body weight change (</span><span style="font-family:Verdana;">1621.8 </span><span style="font-family:Verdana;">g)</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> average daily gain (</span><span style="font-family:Verdana;">28.9 g/day),</span><span style="font-family:Verdana;"> daily feed consumption (</span><span style="font-family:Verdana;">127.4 g/day) and better feed conversion ratio (4.40) than other breed</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;">. The Kuroiler breed has heavier </span><span style="font-family:Verdana;">slaughter weight (</span><span style="font-family:Verdana;">2716.3 </span><span style="font-family:Verdana;">g)</span><span style="font-family:Verdana;">,</span><span> </span><span style="font-family:Verdana;">dressed carcass weight (2201.0 g), eviscerated carcass weight (1905.1 g), breast weight (537.7 g), thigh weight (303.1 g) and drumstick weight (274.8 g) than other breeds. Total edible offal was higher </span><span style="font-family:Verdana;">for </span><span style="font-family:Verdana;">Kuroiler (324.2 g) and Sasso-R (306.1 g), intermediate in Koekoek (204.4 g) and low in Horro (152.4 g) breed. The relative proportion of breast and drumstick (% slaughter weight) were lower in Koekoek and Sasso-R (17.3 and 8.9) breeds, respectively. Abdominal fat weight (13.7</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">g and 1.02%) was lowest in Horro. </span><span style="font-family:Verdana;">Sasso-R showed higher percent edible offal weight (</span><span style="font-family:Verdana;">13.4%) than</span><span style="font-family:Verdana;"> Horro breed (</span><span style="font-family:Verdana;">11.4%). The DM content in breast and thigh meat was higher for Horro breed than the rest. The CP content in the breast and thigh meat was lower for the Kuroiler and Koekoek breeds, respectively. Higher EE in the thigh meat was recorded for Sasso-R (8.9%), whereas, EE content in the breast meat was similar (3.4%</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">3.7%) among the breeds. F</span><span style="font-family:Verdana;">lavor</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> tenderness</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> juiciness and general acceptability of breast and thigh meat were not affected by breed. </span><span style="font-family:Verdana;">The highest net return was observed in the Kuroiler breed. </span><span style="font-family:Verdana;">Based on the results obtained</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> it is suggested that </span><span style="font-family:Verdana;">the Kuroiler breed can be used for cockerel meat production in Ethiopia where intensive broiler production is not well developed.
