Broiler performance traits as affected by naked neck (Na) gene in hot and humid climates

B.K.Patra, S.C. Mishra, P.K. Dehuri and P.K. Mishra
Kasila Farms Limited, R & D Division, Hyderabad

Naked neck homozygous (Na/Na) males mated with females of three normal feathered (na/na) broiler lines to create three different naked neck crosses. Sixth week body weight of NNML, NNFL and NNSL naked neck crosses were respectively, 1159.37, 1098.10 and 1075.17 g in male and 965.71, 921.18 and 929.36 g in females. Feed conversion ratio during 4-6 weeks of age were 2.34, 2.38 and 2.62 in males and 2.62, 2.70 and 2.64 in females in NNML, NNFL and NNSL genetic group, respectively. Males showed significant higher body weight gain than females in all the crosses. Sixth week bio-chemical estimates in NNML, NNFL and NNSL genetic group were respectively, 113.47, 113.06 and 96.70 mg/ 100 ml blood for total blood glucose and 3.76, 4.49 and 4.56mg / 100 ml serum protein. Serum ALP activity and total serum cholesterol at 6 th week of age ranged from 33.54 to 35.04 mIU/ml/min and 74.32 to 109.56 mg/dl, respectively. The estimates of bio-chemical parameters at 6 th week of age were more than 4 th week estimates in all the crosses.

Source : IPSACON-2005

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