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| 两个地理群体香港牡蛎(Crassostrea hongkongensis)杂交子代早期生长发育的杂种优势研究 |
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官俊良,张跃环,苏家齐,肖述,张明,李琼珍,喻子牛
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广西大学,中国科学院南海海洋研究所,中国海洋大学,中国科学院南海海洋研究所,广西大学亚热带农业生物资源保护与利用国家重点实验室,广西水产科学研究院,中国科学院南海海洋研究所
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| 摘要: |
| 为探讨不同地理群体香港牡蛎的杂种优势,于2014年5月开展了广东珠海(Z,生长快)和广西茅尾海(M,抗逆性强)群体间的2×2双列杂交,比较了各实验组早期生长、存活优势,并计算了各阶段的杂种优势,实验由2个杂交组MZ (M♀×Z♂)、ZM(Z♀×M♂)和2个自交组MM(M♀×M♂)、ZZ(Z♀×Z♂)组成。结果表明:浮游期间,正交组(MZ)幼虫在9日龄前未表现出生长优势,但表现出一定的存活优势,幼虫大小存在显著的母本效应; 12日龄时正交杂种优势5.34。反交组(ZM)幼虫生长和存活都表现出了正杂种优势,但生长优势值逐渐减小,到了12日龄时壳高与自繁组(ZZ)幼虫间差异不显著(P>0.05)。室内苗种培育阶段,杂交稚贝表现出明显的生长、存活优势,正交组(MZ)和反交组(ZM)子代的生长优势分别为7.86±3.12、17.47±13.14;存活优势分别为8.33±1.41、2.86±1.08。以上结果说明两个群体香港牡蛎杂交可以产生杂种优势,可为牡蛎杂种优势开发利用提供参考。 |
| 关键词: 香港牡蛎 双列杂交 表型性状 杂种优势 |
| DOI：10.11693/hyhz20150300067 |
| 分类号: |
| 基金项目:国家自然科学基金项目,31272658号,31402299号;国家农业产业技术体系建设专项,CARS-48号。 |
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| HETEROSIS IN EARLY GROWTH STAGE OF HONG KONG OYSTER CRASSOSTREA HONGKONGENSIS HYBRIDIDS FROM TWO GEOGRAPHICAL POPULATIONS |
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GUAN Jun-liang,ZHANG Yue-huan,SU Jia-qi,XIAO Shu,ZHANG Ming①,LI Qiong-zhen and YU Zi-niu②
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State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,Animal Reproduction Institute,Guangxi University,Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences,Key Laboratory of Mariculture Ministry of Education,Fisheries College,Ocean University of China,Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,Animal Reproduction Institute,Guangxi University,Key Laboratory of Mariculture, Guangxi Academy of Fishery Science,Key Laboratory of tropical marine biological resources and ecology,South China Sea Institute of Oceanology,SChinese Academy of Sciences
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| Abstract: |
| To evaluate heterosis in early growth stage of Hong Kong oyster Crassostrea hongkongensis hybrids between two geographical populations (Zhuhai: Z, Maowei Sea: M), a 2×2 diallel crossing was conducted in May 2014, including two self-fertilized groups (MM, ZZ) and two reciprocal crosses (MZ, ZM). Results show that there was no growth heterosis before Day 9, but positive heterosis was observed on day 12 for MZ group with survival heterosis. However, positive heterosis in growth and survival appeared in ZM group during plantonic stage. At spat stage, positive growth and survival heterosis were 7.86±3.12 and 17.47±13.14 for MZ group, and 8.33±1.41 and 2.86±1.08 for ZM group, respectively. The above results indicate that heterosis can be produced from different populations, which offered a theory to use the heterosis for Hong Kong oyster culture. |
| Key words: Crassostrea hongkongensis diallel crosses phenotypic trait heterosis |