石斑鱼杂交种“云龙斑”与亲本的表型数量性状判别分析
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中国水产科学研究院黄海水产研究所

基金项目:

烟台市重点研发计划(2016JH021);烟台市高端人才引进“双百计划”项目(2015-6-023-ZH);青岛海洋科学与技术国家实验室鳌山科技创新计划项目(2015ASKJ02);青岛市南区科技发展资金项目(2015-6-023-ZH)


Analysis of phenotypic quantitative traits of kelp grouper, giant grouper and hybrid progeny
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Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences

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    摘要:

    表型数量性状对于鱼类分类、种质鉴别具有重要作用,表型性状中包含了丰富的遗传信息。利用多重比较、杂交系数比较、判别分析和主成分分析几种生物学多元统计方法,对云纹石斑鱼(♀)、鞍带石斑鱼(♂)及杂交后代"云龙斑"3个生物学群体的14个表型数量性状进行分析,结果显示:"云龙斑"与母本云纹石斑鱼在表型上的相似率达到27.27%,与父本鞍带石斑鱼的相似率达到54.54%。云纹石斑鱼与鞍带石斑鱼的相似率为54.54%。14个性状的平均杂交系数为76.01,证明杂交后代表型数量性状偏向于父本。通过判别分析和主成分分析筛选出能够鉴别杂交后代和亲本的7个主要数量性状,分别为:体长/尾柄长、头长/眼间距、体长/头长、尾柄长/尾柄宽、体长/尾柄宽、腹鳍条、背鳍软鳍条。通过逐步判别拟合出了能够判别以上3个生物学群体的典型判别函数(F1F2)和分类判别函数(Y1Y2Y3),判别准确率平均达到98.85%,可以清晰地将3个生物学群体在二维空间上分类。主成分分析结果显示,前3个主成分的总方差积累贡献率达62.891%,拟合了3个具有代表性性状的主成分函数(P1P2P3),利用前3个主成分在三维空间上绘制出了3个生物学群体分布图。本研究为石斑鱼杂交后代"云龙斑"与亲本云纹石斑鱼和鞍带石斑鱼的种质鉴别提供了丰富的科学依据。

    Abstract:

    Phenotypic quantitative traits are the main basis for fish classification and germplasm characterization, and phenotypic traits contain rich genetic information. This study analysed 14 phenotypical quantitative traits of three biological populations of groupers:Kelp grouper(♀) Epinehelus moara, Giant grouper(♂) E.lanceolatus, and their hydrides "Yunlong grouper" by using multiple comparisons, hybridization coefficient comparison, discriminant analysis and principal component analysis methods.The results showed that the phenotype similarity of the "Yunlong grouper" was 27.27% with that of the female Kelp grouper, and it was 54.54% with that of the male Giant grouper. The similarity rate between the Kelp grouper and the Giant grouper was 54.54%.The average hybridization coefficient of 14 traits was 76.01, which indicated that the hybrid progeny on the phenotypic traits was biased towards male parent. The seven major quantitative traits of the hybrid progeny and parents, including body length/tail handle length, head length/eye spacing, body length/head length, tail handle length/tail handle width, body length/tail handle width, abdominal fins, dorsal fins soft fins, were further analyzed by discriminant analysis and principal component analysis. By comparing the typical discriminant function(F1, F2) and the discriminant function(Y1, Y2, Y3) which can distinguish the above three biological groups, the discriminant accuracy rate reached 98.85% on average and can classify the 3 biological groups in two-dimensional space.Principal component analysis showed that the total variance of the first three principal components of the total variance accumulated contribution rate was 62.891%, fitting the three representative characters of principal component function (P1, P2, P3), indicating that the three biological groups could be clearly distinguished in three-dimensional space by using principal components.This study provides a scientific basis for the identification of the germplasm of the Kelp grouper, Giant grouper and hybrids progeny "Yunlong grouper".

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田永胜,段会敏,唐江,陈张帆,马文辉,庞尊方,李文升,翟介明,毛东亮,王晓梅.石斑鱼杂交种“云龙斑”与亲本的表型数量性状判别分析[J].上海海洋大学学报,2017,26(6):808-817.
TIAN Yongsheng, DUAN Huimin, TANG Jiang, CHEN Zhangfan, MA Wenhui, PANG Zunfang, LI Wensheng, ZHAI Jieming, MAO Dongliang, WANG Xiaomei. Analysis of phenotypic quantitative traits of kelp grouper, giant grouper and hybrid progeny[J]. Journal of Shanghai Ocean University,2017,26(6):808-817.

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  • 收稿日期:2017-04-11
  • 最后修改日期:2017-08-25
  • 录用日期:2017-10-10
  • 在线发布日期: 2017-12-05
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