CN106906203A - 仿刺参的雌核发育诱导方法 - Google Patents
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- 108010024636 Glutathione Proteins 0.000 claims abstract 2
- 238000001914 filtration Methods 0.000 claims description 5
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- 210000001647 gastrula Anatomy 0.000 claims description 3
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- 239000011575 calcium Substances 0.000 description 3
- 235000003969 glutathione Nutrition 0.000 description 2
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- 235000015170 shellfish Nutrition 0.000 description 2
- 241001526627 Azumapecten farreri Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 241000237852 Mollusca Species 0.000 description 1
- 241000283973 Oryctolagus cuniculus Species 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
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- 230000000415 inactivating effect Effects 0.000 description 1
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Abstract
本发明涉及一种仿刺参的雌核发育诱导方法,采用电刺激法,电刺激前先将卵子移入电刺激缓冲液中平衡2min,调好电脉冲仪参数,用吸管吸取1ml卵子放入电击杯中,即可进行电刺激处理;所述电刺激缓冲液为Zimmerman氏缓冲液,具体成分为:0.1mmol/L Ca(C2H3O2)2H2O,1mmol/L K2HPO4,0.5mmol/L Mg(C2H3O2)2·4H2O,0.1mmol/L 还原型谷胱甘肽,1% BSA,0.28mmol/L蔗糖;所述电脉冲仪参数为场强0.8kv/cm,电容3µF,2次电脉冲。所述电刺激时的卵子密度为11×104个/ml。本发明的方法简单有效,经电刺激诱导后,仿刺参的卵裂率可达到28%以上,胚胎存活率可达到98%以上。
Description
技术领域
本发明属于海洋生物技术领域,具体涉及一种仿刺参的雌核发育诱导方法。
背景技术
人工诱导雌核发育有利于快速建立纯系,因此对于遗传育种及基础生物学的研究具有重要意义。在海产经济贝类方面,该领域的研究相对滞后,目前仅在近十种海洋经济贝类中进行了人工诱导雌核发育的研究。这些研究主要是通过使用各种辐射或化学方法灭活精子,从而诱导卵子的雌核发育。研究中常用的同源精子灭活法难以排除外源精子基因组的干扰,所以近年来有学者尝试采用异源精子诱导来消除这种干扰,如在栉孔扇贝和盘鲍等贝类中的研究。然而,异源精子诱导依赖于物种的特异性,且受多种环境因素的影响,如精卵的不同成熟度等,另外卵子的激动也往往不同步,而且如果灭活不充分的话,其实仍有精子污染的问题,因此限制了其在雌核发育中的应用。
与传统的同源或异源精子诱导法相比,电刺激诱导法在整个过程中不需要精子的参与,能彻底排除外源精子基因组的干扰,是理想的诱导方法。该方法已在兔、猪、鼠和牛等哺乳动物中被广泛应用并取得了很大的成功。其机制是采用电刺激的方式,使卵母细胞膜上形成可逆微孔,缓冲液中的钙离子顺细胞内外的浓度梯度而进入卵胞质,引发钙库释放钙离子或者胞质钙离子的迅速转移,从而模拟正常受精时钙离子规律性的波动现象启动卵子发育。但迄今为止,该方法在海洋生物雌核发育研究中,尚无报道。本研究首次尝试采用电刺激法诱导仿刺参雌核发育,对其诱导参数及雌核发育过程中的细胞学机制进行初步探索,旨在建立电刺激诱导仿刺参雌核发育的技术方法。
发明内容
针对上述问题,本发明旨在建立电刺激诱导仿刺参雌核发育的技术方法。
一种仿刺参的雌核发育诱导方法,采用电刺激法,电刺激前先将卵子移入电刺激缓冲液中平衡
2min,调好电脉冲仪参数,用吸管吸取 1ml 卵子放入电击杯中,即可进行电刺激处理;
所述电刺激缓冲液为Zimmerman氏缓冲液,具体成分为:0.1 mmol/L Ca(C2H3O2)2H2O,1 mmol/L K2HPO4,0.5 mmol/L Mg(C2H3O2)2·4H2O,0.1 mmol/L 还原型谷胱甘肽,1% BSA,0.28 mmol/L蔗糖;
所述电脉冲仪参数为场强0.8 kv/cm,电容3 µF,2次电脉冲。
所述电刺激时的卵子密度为11×104个/ml。
电刺激后卵子及胚胎的培养方法为:经电刺激后的卵子被放入直径 15 cm 培养皿中,用高温蒸煮的过滤海水培养,水温保持 20℃,培养密度为每个培养皿中每升约 2×105个卵子;培养初期每半小时轻轻搅动海水一次,以后每 3~4h 搅动一次,以促进其孵化。
电刺激处理后 2 小时统计各组的卵裂率,24 小时统计胚胎存活率;
卵裂率或雌核发育诱导率=发生卵裂和排放极体的卵数/观察总卵数×100%;
胚胎存活率=上浮的原肠胚数量/发生卵裂的总卵数×100%。
本发明的方法简单有效,经电刺激诱导后,仿刺参的卵裂率可达到28%以上,胚胎存活率可达到98%以上。
具体实施方式
下面结合具体实施例对本发明做进一步详细说明。
亲本的暂养与精卵的收集
仿刺参取回后暂养于14℃循环海水中,雌雄个体分开暂养。投喂饵料。暂养期间每天升温1℃,至16~17℃恒温待产。采用光照刺激法获得卵子,待卵子产出后,先用 300 目筛绢过滤卵子,然后用 500 目的筛绢过滤收集卵子,稀释后显微镜下观察定量卵子的密度。根据实验需要调整卵子的密度。
仿刺参卵子的电刺激处理
卵子雌核发育的诱导:采用电刺激法,电刺激前先将卵子移入电刺激缓冲液中平衡
2min,调好电脉冲仪参数,用吸管吸取 1ml 卵子放入电击杯中,即可进行电刺激处理。
所述电刺激缓冲液为Zimmerman氏缓冲液,具体成分为:0.1 mmol/L Ca(C2H3O2)2H2O,1 mmol/L K2HPO4,0.5 mmol/L Mg(C2H3O2)2·4H2O,0.1 mmol/L 还原型谷胱甘肽,1% BSA,0.28 mmol/L蔗糖。
所述电脉冲仪参数为场强0.8 kv/cm,电容3 µF,2次电脉冲。
所述电刺激时的卵子密度为11×104个/ml。
电刺激后卵子及胚胎的培养
经电刺激后的卵子被放入直径 15 cm 培养皿中,用高温蒸煮的过滤海水培养,水温保持 20℃,培养密度为每个培养皿中每升约 2×105个卵子;培养初期每半小时轻轻搅动海水一次,以后每 3~4h 搅动一次,以促进其孵化。
电刺激处理后 2 小时统计各组的卵裂率,24 小时统计胚胎存活率。
卵裂率或雌核发育诱导率=发生卵裂和排放极体的卵数/观察总卵数×100%
胚胎存活率=上浮的原肠胚数量/发生卵裂的总卵数×100%
经统计,上述电刺激诱导后,仿刺参的卵裂率为28.23%,胚胎存活率为98.23%。
Claims (4)
1.一种仿刺参的雌核发育诱导方法,其特征在于,采用电刺激法,电刺激前先将卵子移入电刺激缓冲液中平衡 2min,调好电脉冲仪参数,用吸管吸取
1ml 卵子放入电击杯中,即可进行电刺激处理;
所述电刺激缓冲液为Zimmerman氏缓冲液,具体成分为:0.1 mmol/L
Ca(C2H3O2)2H2O,1 mmol/L
K2HPO4,0.5 mmol/L Mg(C2H3O2)2·4H2O,0.1 mmol/L
还原型谷胱甘肽,1% BSA,0.28 mmol/L蔗糖;
所述电脉冲仪参数为场强0.8
kv/cm,电容3 µF,2次电脉冲。
2.根据权利要求1所述的仿刺参的雌核发育诱导方法,其特征在于,所述电刺激时的卵子密度为11×104个/ml。
3.根据权利要求1所述的仿刺参的雌核发育诱导方法,其特征在于,电刺激后卵子及胚胎的培养方法为:经电刺激后的卵子被放入直径 15 cm 培养皿中,用高温蒸煮的过滤海水培养,水温保持 20℃,培养密度为每个培养皿中每升约 2×105个卵子;培养初期每半小时轻轻搅动海水一次,以后每 3~4h 搅动一次,以促进其孵化。
4.根据权利要求1所述的仿刺参的雌核发育诱导方法,其特征在于,电刺激处理后 2 小时统计各组的卵裂率,24 小时统计胚胎存活率;
卵裂率或雌核发育诱导率=发生卵裂和排放极体的卵数/观察总卵数×100%;
胚胎存活率=上浮的原肠胚数量/发生卵裂的总卵数×100%。
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CN110946100A (zh) * | 2019-12-23 | 2020-04-03 | 上海海洋大学 | 海参低聚肽在诱导厚壳贻贝稚贝附着中的应用 |
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CN110946100B (zh) * | 2019-12-23 | 2021-11-30 | 上海海洋大学 | 海参低聚肽在诱导厚壳贻贝稚贝附着中的应用 |
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