利用鱼类性逆转技术创制黄颡鱼XX雄鱼的方法
PRODUCTION OF XX MALE YELLOW CATFISH BY SEX-REVERSAL TECHNOLOGY
查看参考文献46篇
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文摘
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目前黄颡鱼(Pelteobagrus fulvidraco Richardson)生产上使用的母本非常混杂,成为影响黄颡鱼产业发展的一个突出问题。建立一个优良性状稳定的全雌家系对于全雄黄颡鱼和杂交黄颡鱼的生产尤为重要,而将XX雌性黄颡鱼逆转为XX雄性黄颡鱼是创制全雌家系中的关键一步。黄颡鱼性染色体连锁分子标记的开发为鉴定XX雄鱼提供了技术支撑。研究使用不同浓度的17α-甲基睾酮(MT)和芳香化酶抑制剂来曲唑(LZ)处理黄颡鱼鱼苗54d (7—60日龄)。61日龄测量并统计各组鱼的存活率、体长及体重。解剖观察性腺结构,结合性腺组织切片和性别分子标记分析各组实验鱼中XX鱼性腺发育情况。结果显示: 2种药物对黄颡鱼的存活率影响较小,与对照组没有显著差异; MT处理的XX性腺为空腔状精小囊结构,不能逆转为功能性精巢;适当剂量的LZ可以将XX雌性黄颡鱼性逆转成正常的XX雄鱼,诱导效果随着剂量的增加而增强。用完全逆转的XX生理雄鱼分别与XX雌鱼和YY雌鱼交配,能够正常繁殖并具备较好的繁殖能力。研究建立了一种使用芳香化酶抑制剂来曲唑创制黄颡鱼XX雄鱼的方法,为全雄黄颡鱼的品种改良及新品种的培育奠定了基础。 |
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其他语种文摘
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One of the serious problems in aqua-cultural yellow catfish is that the background of female parents is confused. It is particularly important to establish all-female families for the all-male and hybrid yellow catfish production, in which sex-reversal of XX female to XX male is a key step. Development of sex chromosome-linked markers provides a technical support for the identification of XX males in yellow catfish. In this study, different concentrations of 17α-methyltestosterone (MT) and aromatase inhibitor letrozole (LZ) were used for 54 days to treat yellow catfish (7 to 60 days post fertilization). The survival rate, body length, and body weight of each group were measured at 61 days after fertilization (61 days post fertilization). Gonadal structure was observed and histologically analyzed in XX individuals that were identified by sex-linked markers. As a result, MT and LZ treatments had no significant effects on the survival rate when compared with the control group. In addition, the XX gonad treated by MT showed seminal vesicles and could not be reversed into functional testis. However, appropriate dose of LZ could induce the sex-reversal of XX female to normal XX male, and the induction effect was enhanced with the increase of dose as well. The XX male could normally mate with XX female and YY female, which demonstrated appropriate reproductive ability. The present study proposed a reliable method to create XX male using the aromatase inhibitor LZ, which lays the foundation for the breed improvement of all-male yellow catfish and cultivation of new varieties of yellow catfish. |
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来源
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水生生物学报
,2018,42(5):871-878 【核心库】
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DOI
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10.7541/2018.107
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关键词
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黄颡鱼
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甲基睾丸酮
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芳香化物酶抑制剂
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性逆转
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XX雄鱼
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地址
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1.
华中农业大学水产学院, 武汉, 430070
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武汉百瑞生物技术有限公司, 武汉, 430070
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中国科学院水生生物研究所, 淡水生态与生物技术国家重点实验室, 武汉, 430072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-3207 |
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学科
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水产、渔业 |
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基金
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国家现代农业产业技术体系特色淡水鱼体系项目
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文献收藏号
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CSCD:6328307
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