生物技术通报 ›› 2014, Vol. 0 ›› Issue (12): 184-189.doi: 10.13560/j.cnki.biotech.bull.1985.2014.12.031

• 研究报告 • 上一篇    下一篇

三种鳜鱼骨骼肌生长及相关调控基因表达比较

许淼洋1, 赵金良1 ,李传阳1 ,钱叶周2, 吴超2 ,钱德2   

  1. 1. 上海海洋大学 农业部淡水水产种质资源重点实验室,上海 201306; 2. 池州市秋浦特种水产开发有限公司,池州 247104
  • 收稿日期:2014-04-15 出版日期:2014-12-08 发布日期:2014-12-12
  • 作者简介:许淼洋,女,硕士研究生,研究方向:水产动物遗传育种与繁殖;E-mail:ur_mysunshine@live.cn
  • 基金资助:
    池州市秋浦特种水产开发有限公司专项(2012A01)

Comparison on Muscle Growth and Expression of Muscle Growth- related Genes Among Three Mandarin Fishes

1Xu Miaoyang,1Zhao Jinliang,1Li Chuanyang,2Qian Yezhou,2Wu Chao,2Qian De   

  1. (1. Laboratory of Freshwater Fisheries Germplasm Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306; Chizhou Institute of Special Aquaculture, Chizhou 247104)
  • Received:2014-04-15 Published:2014-12-08 Online:2014-12-12

摘要: 通过制作骨骼肌石蜡切片研究了鳜、斑鳜及斑鳜(♀)× 鳜(♂)杂交一代不同发育时期(孵化后 10D、20D、 30D、60D、90D)骨骼肌肌纤维的生长特征,同时,利用 qPCR 技术分析了肌肉中 myostatin、MyoD、myogenin 三个基因 mRNA 的 表达变化。结果表明,3 种鳜鱼全长均随日龄呈增大趋势,种间生长差异显著,鳜生长最快,斑鳜最慢,杂交一代介于斑鳜和鳜之间。 不同发育时期,3 种鳜鱼骨骼肌肌纤维数目较为接近,增生生长种间无明显差异,而肌纤维平均直径大小与其生长快慢间呈正相关, 表明不同鳜鱼种间生长差异主要由肌肉肥大生长引起的。鳜、斑鳜和杂交一代 myostatin mRNA 在 D20 出现表达高峰,之后表达量 呈下降趋势。MyoD 在 D10、D20 表达水平较高,后期表达水平下降 ;Myogenin 在 D20 时表达量最低,之后,鳜表达量升高最为明 显,杂交一代次之,斑鳜保持平稳。不同种类鳜鱼肌肉生长差异与 3 种基因表达差异间存在一定相关性。

关键词: 鳜鱼, 生长, 肌纤维, myostatin, MyoD, myogenin, mRNA表达量

Abstract: Muscle samples of Siniperca chuatsi ♂×S. scherzeri ♀ F1 and their parents at five developmental stages in 90 days after hatching. The skeletal muscle growth characteristics were identified by numbers and diameters of muscle fibers through paraffin sections.Meantime were obtained and the mRNA expression of myostatin, MyoD, myogenin in muscle was detected by quantitative PCR. The results showed there were significant differences in growth among three mandarin fish. Siniperca chautsi grew the fastest, F1 secondly and S. scherzeri kept the last. At different developmental stages, numbers of muscle fibers in three mandarin fish showed no significant difference, while the average diameters of the muscle fibers showed positive correlation with growth rate. Growth differences among three mandarin were mainly caused by muscle hypertrophy. The myostatin mRNA expression peak appeared in D20, then the expression showed a downward trend. MyoD mRNA expressed highly in D10, D20 and decreased in following days. The myogenin mRNA expression was the lowest in D20, followed by an obviously increase in Siniperca chuatsi, and F1 secondly, while S. scherzeri stable. It showed correlations between muscle growth and gene expression in three mandarin at different growth stages.

Key words: Siniperca, Growth, Muscle fiber, Myostatin, MyoD, Myogenin, mRNA expression