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不同光照制度对绍兴鸭和高邮鸭生长与相关激素及其基因表达的影响

DOI: 10.7685/j.issn.1000-2030.2001.02.019, PP. 79-82

Keywords: ,光照制度,生长,激素,基因表达

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Abstract:

取33日龄高邮鸭和绍兴鸭公鸭各32只,每品种分为两组,分别给以20h和6h光照,试验期14d。试验前后称重。Northern杂交法测定垂体GHmRNA和下丘脑SSmRNA表达水平,放免法测定血清中生长激素(GH)、胰岛素生长因子1(IGF1)、甲状腺激素(T3、T4)水平。结果表明高邮鸭20h光照时增重、GH及T4水平显著低于6h光照(P<001);而绍兴鸭的增重变化则与高邮鸭相反(P<001),血浆GH水平变化与高邮鸭相同,T4水平无显著变化。光照制度的改变未引起两品种鸭IGF1、T3水平的显著变化。垂体GHmRNA表达水平的变化与增重变化相反。提示光照直接影响鸭生长轴基因的表达以及激素水平,从而显著影响生长速度,但这种影响在不同品种可有完全不同的表现

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