Ali Asghar SADEGHI, Aida SAFAEI, Mehdi AMINAFSHAR

The effects of dietary oil sources on performance, serum corticosterone level, antibody titers and IFN-γ gene expression in broiler chickens

Bu çalışma diyete balık yağı, soya yağı ve zeytinyağı ilavesinin broyler tavuklarda performans ve bağışıklık cevabı üzerine etkisini araştırmak amacıyla yapılmıştır. Tamamıyla rastgele dizaynda 320 broyler tavuk (Ross 308, 7 günlük) her birinde 20 tavuk bulunan ve 4 tekrarlı olmak üzere 4 ayrı diyet grubuna (Kontrol ve üç ayrı yağ uygulaması) ayrıldı. Çalışmanın sonuçları soya yağı ile beslenen civcivlerin diğer gruplar ile karşılaştırıldığında vücut ağırlık artışlarının daha yüksek ve yem dönüşüm oranının tüm periyot içerisinde daha iyi olduğunu gösterdi (P

Broylerlerde diyetteki yağ kaynaklarının performans, serum kortikosteron düzeyi, antikor titresi ve IFN-γ gen ekspresyonu üzerine etkileri

The present study was performed to evaluate the efects of addition of fish oil, soybean oil and olive oil to diet on performance and immune response in broiler chickens. In a completely randomized design, 320 broiler chickens (Ross 308, 7 days old) were allocated to four dietary treatments (control and three vegetable oils), four replicates with 20 chicks per each. The results showed that body weight gain of chicks fed soybean oil was higher and feed conversion ratio was better than the other treatments in the total period (P<0.05). The gene expression of γ-interferon (IFN-γ) in spleen tissue was infuenced by treatments. The mRNA level of IFN-γ was higher in chicks fed fish oil than the other groups, also antibody titers against Newcastle virus in chicks fed fish oil were higher than the other groups (P<0.05). For antibody titers against sheep red blood cell, there were no diferences among treatments (P>0.05). Chicks fed fish oil had higher relative weights of bursa of Fabricius and there were no significant diferences in relative weights of spleen among treatments. It was concluded that the source of oils in the diet may be afect the performance and immune response, the addition of fish oil and soybean oil to the diet resulted in significant improvement of performance and immune response in broiler chickens, respectively.

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