جستجوی مقالات مرتبط با کلیدواژه « مرغ خزک » در نشریات گروه « علوم دام »

Today, genes in the mitochondrial genome are widely used as a strong genetic marker.The purpose of this study was to determine sequence of ND6 gene of the mitochondrial genome of Khazak chicken and investigate the phylogenetic relationship of this region of the genome with other chicken breeds and some fowls of around the world. 20 blood samples of wing vein were collected from Khazak chicken of Research Center of specific livestock of Sistan and Baluchestan province. DNA was extracted from whole blood. Then, the ND6 gene along with a portion of upstream and downstream tRNA (854 bp) was amplified from mitochondrial genome by specific primers in Polymerase Chain Reaction. Samples were sequenced after purification and genetic diversity was investigated within the population. After Download similar sequences of the other mitochondrial genome from the chicken breeds and some fowls of the NCBI, phylogenetic analysis was carried out. The results showed that there was no nucleotide difference between ND6 sequences of native Khazak chicken. The results of the phylogenetic tree from native Khazak chicken with other breeds showed that the highest genetic similarity was observed from this region of the mitochondrial genome of native Khazak chicken with HuangLang, Zhuxiang, Fiji, Philippines, Hengshan Yellow, Jinhu Wufeng and Red jungle fowl breeds which indicates that there are a high genetic relationship between the native Khazak chicken with the Japanese and Chinese (southeastern Asia) chicken breeds. The least genetic similarity of ND6 sequence from native Khazak chicken was observed with the Grus japonesis.

In this study, effects of the in ovo injection of Khazak egg yolk into the yolk of the Ross 308 eggs on some of offspring's inflammatory and immune indices as well as on the relative expression of intestinal and hepatic TNF-α and/or Zo-1 genes, were investigated. For this purpose, 250 fertile Ross 308 eggs were randomly assigned into two equal experimental groups including test (In ovo injection of Khazak yolk) and control (In ovo injection of Ross yolk) group. After hatching, chickens were reared for six weeks under the same standard environmental conditions with exposure to some certain inflammatory stimuli between 21-28 days of age. Chicken’s blood and/or tissues samples were collected on days 10 and 42, and the samples were analyzed for the target traits. Results showed that Khazak yolk component caused a reduction in the levels of pro-inflammatory TNF-α cytokine in both offspring's liver and intestinal tissue (P<0.05). Compared to the control group, khazak yolk injection was found to enhance the titer of IgA natural antibodyas well as primary and secondary antibody titer response against sheep red blood cells (SRBC) and reduces both serum levels of offspring's CRP protein and liver ALT enzyme (P<0.05). According to the results of the present study, injection of Khazak native hen egg-yolk into the yolk of eggs from Ross 308 commercial broiler breeder can effectively suppress the expression of TNF-α inflammatory cytokine in the offspring's liver and intestinal tissue.