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鸭胚胎骨骼肌TR-βmRNA发育性表达及与肌重相关性研究

DOI: 10.3969/j.issn.1000-7091.2012.06.004, PP. 15-19

Keywords: ,TR-&beta,基因,胚胎期,骨骼肌

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Abstract:

为探讨TR-β基因在不同品种鸭胚胎期和出雏早期胸肌和腿肌中表达的发育性变化及其对胸腿肌重的影响。采用实时荧光定量PCR方法研究了高邮鸭和金定鸭胚胎期(17,21,25,27胚龄)和出雏早期(7日龄)胸腿肌中TR-βmRNA的表达水平。结果表明,TR-βmRNA在2个品种鸭肌肉早期发育中表现出一致的表达规律,但在腿肌和胸肌的发育性变化规律稍有不同:在胚胎期胸肌和腿肌中的TR-βmRNA表达量均呈先低后高的趋势,27胚龄时表达量最高;但出壳后胸肌中的TR-βmRNA表达量出现显著下降(P<0.01),而腿肌仍维持高水平表达(P>0.05)。表明TR-βmRNA表达具有显著的胚(日)龄依赖性,并存在组织差异,但无品种差异。鸭发育早期胸腿肌中TR-βmRNA表达量与胸腿肌重的相关性分析表明,两者呈强的正相关,提示胸腿肌中TR-βmRNA的表达可能在鸭早期胸腿肌发育过程中发挥着正调控作用。

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