Comparative study on some immunological traits in two different genetic groups of chicken

Abstract

Aim:This study was carried out on one hundred and twenty chicks (60 Libyan native and 60 broiler chicks) to evaluate and compare some productive and immunological characteristics. Materials and Methods: Weekly body weight (from day-old until 6 weeks of age), feed conversion ratio (from 3- 6 weeks of age), phagocytic ability index, count of both heterophils and lymphocytes and its ratio and blood profile were determined. Results: Body weight of Libyan nativechickens was dramatically reduced as compared to broiler chickens throughout trial period. Feed conversion ratio of Libyan native chickens was pronounced deteriorated during studied period as compared to broiler ones. The phagocytic ability of Libyan native chickenswas more efficient than those of broiler chickens counterparts. TheLibyan native chickens were less stressful compared to broiler ones, because of significant decrease of H/L ratio trait in Libyan chickens.Conclusion: It was expected that the broiler chickens were superior in productive traits (body weight and feed conversion ratio) as compared t native chickens. On the other hand, the superiority in immunological parameters such as phagocytic activity and H/L ratio (as a stress measure) was obtained by Libyan native chickens. Consequently, more attention must be considered for Libyan native chicken andusing different crossing and selection methodsto produce meat and egg native lines for improving its productive traits besides keeping and benefit its outstanding immunological abilities.