Morphological Variation Analysis of Different Geographical Populations of Lutraria sieboldii in the Coastal Area of Beibu Gulf
Four geographical groups,namely Beihai,Dongxing,Fangchenggang,and Caotan,were randomly selected to measure the shell length(LS),shell width(WS),shell height(HS),leading edge length(LE),trailing edge length(LT),shell thickness(TS),total weight(WT),soft body weight(WM),and shell weight(WSW).After the measurement data was corrected,five kinds of multivariate sta-tistical analysis methods were used to analyze the morphological differences among the four populations,including the variation analysis of the morphological indices,one-way variance analysis,cluster analysis,principal component analysis and discriminant analysis.The results showed that the shell type of Caotan population was relatively round,while the shell type of Fangchenggang population was relatively flat.The shell length of all the four populations tended to grow on one side and had a greater degree of posterior growth.The differentiation degree of all the four populations had not yet reached the level of subspecies difference.ANOVA and multiple comparison analysis revealed significant mor-phological differences among the four populations.The results of the principal component analysis showed that the contribution rate of principal component 1 was 47.861%,the contribution rate of principal component 2 was 17.252%,the contribution rate of principal component 3 was 14.090%,and the cumulative contribution rate was 79.203% .Based on the principal component scores,a scatter plot of principal compo-nents was constructed,which revealed a high degree of similarity among the Beihai population,Caotan population,and Dongxing population,while Fangchenggang population had a significant degree of difference from the other three groups.The cluster analysis results showed that the three populations of Beihai,Caotan,and Dongxing converged to form a branch,while Fangchenggang population formed an independent branch.The discriminant analysis results showed that the discrimination accuracy P1 was 87.18%-100%,P2 was 84.85%-100%,and the comprehensive discrimination rate(P)of the four populations was 94.57% .The morphological differences among the four populations truly existed.The differences among Beihai,Dongxing,and Caotan populations were relatively small,while Fangchenggang population had greater differences with the other three populations.The morphological differences among the four populations might be related with gene exchange among the populations,the ecological environment,and some artificial breeding and development activities.The morphological differences of four different geographical populations of Lutaria sieboldii in the the coastal area of Beibu Gulf were analyzed,which could provide the materi-als for the protection of germplasm resources and the selection of excellent varieties.
万方数据
维普
