Comparative Analysis Of Turpan Cockfighting And Hyline Layer Growth And Thyroid Axis

Turpan cockfighting rare germplasm resources in China, one of the five famous cockfighting, brave and fierce, famous at home and abroad, included in China’s livestock and poultry species protection in 2006. The aggressive behavior of animals regulate neural circuit is very complex, The study found people with aggressive behavior related to the endocrine system, but whether the aggressive behavior cockfighting same people, but also their endocrine-related has not been reported. Thus, the present study the strong aggressive behavior Turpan cockfighting and aggressive behavior weaker Hyline layer as the research object, analyze the differences Turpan cockfighting and Hyline layer growth, and explore the impact on the thyroid axis Turpan cockfighting aggressive behavior, endocrine regulation mechanism depth study Turpan cockfighting aggressive behavior is important,research contents and results are as follows.(1)To understand the Turpan cockfighting and Hyline layer difference in growth with electronic scales weighing0 week, 4 weeks old, 8 weeks, 12 weeks, 16 weeks, 20 weeks, 24 weeks old chickens weight. At 12 weeks and 24 weeks of Turpan cockfighting and Hyline layer were slaughtered and measured body size determination.It was found Turpan cockfighting in 12 weeks-20 weeks fastest weight gain, weight higher than Hyline layer. In body size measurement cockfighting shank length greater than Hyline layer, weight and body length, tibia length was significantly positively correlated, reflecting the good fight cockfighting this feature, slaughter assay, cockfighting slaughter weight higher than Hyline layer, and carcass weight and eviscerated weight, eviscerated weight the most relevant.(2) By immunohistochemistry to observe the distribution of cases thyrotropin releasing hormone(TRH) neurons in Turpan cockfighting and Hyline layers different weeks hypothalamus. observation immunohistochemical sliced positive cells TRH hypothalamus.The results showed that TRH in the hypothalamus of the number of positive cells with increasing weeks gradually reduced. In different weeks of cockfighting TRH positive cells was slightly higher than Hyline layers. The TRH neurons in the hypothalamus, mainly in the nucleus, medial preoptic nucleus and the median eminence and other parts of the paraventricular.(3) To find Turpan cockfighting strong attacks and thyrotropin releasing hormone(TRH), thyroid hormone(TH) relationship.When measured by enzyme-linked immunosorbent assay for different ages Turpan cockfighting and Hyline layer, and cockfighting roosters and Hyline roosters serum TRH and TH were detected in aggressive behavior. The results showed that in different ages, with the growth, cockfighting and Hyline layer TRH content increased gradually, TH decreased,cockfighting rooster highcontent of TRH and TH. When cockfighting rooster and Hyline rooster aggressive behavior measurement, TRH, TH highest content in a fight before, after fighting the lowest overall downward trend, cockfighting rooster content higher than Hyline roosters, persistent cockfighting cock fighting time than Hyline roosters long, cockfighting strong aggressive behavior may be related to high levels of these two hormones are related. But the attacks also exist between many hormones, studies need further proof.(4) In order to study under Turpan cockfighting and Hyline layer hypothalamus thyrotropin releasing hormone mRNA expression level changes. Using real-time fluorescence relative quantitative Determination hypothalamic TRH mRNA in Turpan cockfighting with Hyline layer of different growth-week-old relative expression levels. The results can be seen in the relative expression of hypothalamic TRH gene under Turpan cockfighting with Hyline layer amount grows-week-old and growth, on the whole, TRH gene mRNA relative expression levels cockfighting higher than Hyline layer.In summary, Turpan cockfighting has body is tall(tibia length), burly(slaughter rate),thyrotropin releasing hormone(TRH) neurons decreased slowly, TRH and thyroid hormone(TH) at a high level, TRH gene mRNA expression and other high volume adapted to fight the growth characteristics. Therefore, the study results show that in addition to Turpan cockfighting personalized attacks related to their growth and development, also confirmed that the same human thyroid axis aggressive behavior has an important influence.