摘要
运用3种多元分析方法，对三角帆蚌Hyriopsis cumingii 3个地理种群杂交与自交后的9个群体的10个形态比例性状进行了比较研究。聚类分析结果表明，DP（洞庭湖♀×鄱阳湖♂）与PD（鄱阳湖♀×洞庭湖♂）的形态距离最短，分为一支，其次为DD（洞庭湖♀×洞庭湖♂）和PP（鄱阳湖♀×鄱阳湖♂），分为另一支，而，IT（太湖♀×太湖♂）与W（鄱阳湖♀×太湖♂）、TY与DP的遗传距离最大。主成分分析构建了3个主成分，主成分1为21．13％，主成分2为15．33％，主成分3为17．59％，累积贡献率为54．05％。在第一主成分中，FG（全高）与FB（帆状顶点到后端）的影响最大（77．88％、73．46％）；第二主成分中，OB（顶点到后端）与OD（顶点到铰合部后缘）的影响最大（85．38％、88．06％）；第三主成分中，OH（壳高）与OC（顶点到铰合部前缘）的影响最大（70．32％、78．14％）。判别分析结果表明：9群体三角帆蚌形态差异极显著（P〈0．01）；对这9个群体按杂交组合分成A、B、C3组，建立了判别函数，其判别准确率P1为56．41％-90．24％，P2为61．22％-97．30％，综合判别率为68．75％-79．78％，判别效果较为理想。
Three muhivariation analysis methods （cluster analysis, principal component analysis and discriminant analysis） were used to investigate the morphological variations among three self- bred （DD, PP and TT） and six corresponding hybrids （DP, PD, PT, TP, TD and DT） in fresh water mussel Hyriopsis cumingii from three geographical populations of Dongtinghu Lake （DD）, Poyanghu Lake （PP） and Taihu Lake（TT） based on ten morphological indexes. The cluster analysis indicated that there were most similar morphological characters between the stocks of DP and PD, and between DD and PP while TT had quite different morphological character from PT and DP. In the principal component analysis, three principal components were constructed, with the contributory ratio of the Factor 1, Factor 2 and Factor 3 of 21.13%, 15.33%, and 17.59%, respectively and the cumulative contributory ratio of 54.05%. In Factor 1, FG and FB contributory ratio was 77.88% and 73.46%, Factor 2,OB and OD contributory ratio was 85.38% and 88.06% and OH and OC contributory ratio was 70.32% and 78.14% in Factor 3. The discriminant analysis revealed that there were significant differences among the 9 stocks（ P 〈 0. 01 ）. According to crossing group, the 9 stocks were divided into 3 groups （ A, B and C） to construct discriminant functions. The identification accuracy was 56. 41% - 90.24% （P1） and 61.22% - 97.30% （P2）, and the total identification accuracy was 68.75% - 79.78%. Therefore, the discriminant functions were somewhat effective distinguishing the stocks among these hybridization groups.
出处
《大连水产学院学报》
CSCD
北大核心
2008年第2期92-97,共6页
Journal of Dalian Fisheries University
基金
国家科技支撑计划(BAD01A13)
农业部农业结构调整重大技术研究专项项目(06-05-05B)
上海市科委基础重大项目(06DJ14006)
上海高校水产养殖E-研究院建设项目(03E009)
上海市水产养殖重点学科建设项目(Y1101)
上海市教委一般基金(06K2006)
关键词
三角帆蚌
杂种
形态变异
多元分析
Hyriopsis cumingii
hybrid
morphological variation
muhivariation analysis
