畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (9): 1410-1416.doi: 10.11843/j.issn.0366-6964.2014.09.005

• 遗传繁育 • 上一篇    下一篇

核移植方法和维生素C影响绵羊克隆胚胎体外发育

闵江涛1,2,杜卫华1,赵学明1,郝海生1,杭苏琴2,朱化彬1*   

  1. (1.中国农业科学院北京畜牧兽医研究所,北京 100193; 2.南京农业大学动物科技学院,南京 210095)
  • 收稿日期:2014-04-03 出版日期:2014-09-23 发布日期:2014-09-23
  • 通讯作者: 朱化彬,研究员,E-mail:zhuhuabin@caas.cn
  • 作者简介:闵江涛(1987-),男,辽宁人,硕士,主要从事胚胎工程研究,E-mail:minjiangtao@live.com
  • 基金资助:

    国家科技支撑计划(2011BAD19B02)

Nuclear Transfer Methods and Vitamin C Affect the in vitro Development of Ovine Cloned Embryos

MIN Jiang-tao1,2,DU Wei-hua1,ZHAO Xue-ming1,HAO Hai-sheng1,HANG Su-qin2,ZHU Hua-bin1*   

  1. (1.Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,China;2.College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China)
  • Received:2014-04-03 Online:2014-09-23 Published:2014-09-23

摘要:

旨在研究绵羊体细胞核移植过程中,不同核移植方法及胚胎培养液中添加维生素C对绵羊克隆胚胎生产效率的影响,为优化绵羊体细胞克隆技术体系提供试验依据。用屠宰场采集的绵羊卵巢为试验材料,经卵母细胞体外成熟后进行核移植操作,采用微电极融合、无透明带克隆与显微注射等核移植方法,比较胚胎构建效率,利用绵羊孤雌胚胎摸索发育液中添加维生素C最适浓度,将该浓度用于克隆胚胎体外培养,统计胚胎发育情况。结果表明:采用25 V微电极融合法融合率显著高于平行电极融合法 (P<0.05),但与30 V电压差异不显著。25 V电压微电极融合法死卵率显著低于30 V融合法(P<0.05);无透明带构建克隆胚胎的桑椹胚率显著高于显微注射法(P<0.05),但囊胚率差异不显著(P>0.05);胚胎培养液中添加50 μmol•L-1维生素C显著提高了孤雌激活与体细胞克隆胚胎囊胚率(P<0.05)。综上所述,微电极融合法可显著提高绵羊体细胞核移植融合效率,无透明带构建方法不能显著提高克隆胚胎囊胚率,胚胎培养液中添加50 μmol•L-1维生素C可显著提高绵羊克隆胚胎囊胚率。

Abstract:

The present study was designed to investigate the effects of different nuclear transfer methods and supplementation of culture media with vitamin C on the fusion rate and development of ovine cloned embryos.The abattoir-derived ovaries were collected for materials.After in vitro maturation of oocytes,micro-electrode fusion,zona-free and micro-injection cloning were performed to compare their efficiencies in construction of cloned embryos.Optimal concentration of vitamin C was explored by examining the effects of different concentrations of vitamin C on the parthenogenetic development of oocytes and subsequently applied to in vitro culture of cloned embryos.The results showed that fusion rate obtained from micro-electrode fusion with 25 volts was significantly increased compared with Chamber fusion (P<0.05).Twenty five volts resulted in less dead oocytes than 30 volts in micro-electrode fusion (P<0.05).Zona-free cloning significantly increased the morula rate of cloned embryos (P<0.05),but failed to increase blastocyst rate significantly (P>0.05).Vitamin C supplementation with the concentration of 50 μmol•L-1 significantly increased blastocyst rate of ovine parthenogenetic and cloned embryos (P<0.05).Altogether,fusion rate during somatic cell nuclear transfer could be increased by micro-electrode fusion.Blastocyst development of ovine cloned embryos could not be improved by zona-free cloning.Fifty μmol•L -1 vitamin C was beneficial for in vitro culture of ovine cloned embryos.

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