Relationship between Selection for Humoral Immune Response and Productive and Reproductive Traits in Fayoumi Male of Chicken

Abstract

The present study was conducted to elucidate the relationship between humoral immune response selection and some productive traits in three lines of Fayoumi cocks .A total of 300 male Fayoumi chicks were divided into three lines , control , high and low according to their immune response against SRBC injection . They were fed the formulated diets in adlibitum . Resutts showed that the high line males ND,H9 had significantly higher immune response against NDV and H9 than the other lines . Thyroid hormones concentration in the control and low line were significantly higher than high line . males but non significant effect on T3/T4 ratio between all male lines . The control line had better testosterone hormone level than the high line,while. serum corticosterone hormone concentration was higher in the control and high lines than the low line males . Ejaculate volume ,abnormal sperm percentage and total abnormal sperm / ejaculate did not significantly different between lines studied. the low line in sperm motility (score) was significantly higher than that from the high line. non significantly difference between the low line and the control . Sperm concentration, total sperm /ejaculate and total live sperm / ejaculate were significantly higher in the low and control lines compared by the high line males . Both comb width , and length , wattle width and length did not significantly influenced by Fayoumi -selected lines . Serum total protein , albumin and globulin were significantly improved for the high line followed by the control line while the low line recorded the lowest value . both total cholesterol, triglycerides , ASTand ALT did not significantly influenced by Fayoumi males selected lines . Avrage of immunoglobulins of different lines of Fayoumi males after 10 days from injection of SRBC was significantly higher in the high line males than the other line . It is concluded that the high line males had significantly higher antibody titer against SRBC in terms of higher plasma IgG and IgM compared to males from the control and low line males .