The objective of this study was to gain insight into the growth and morphological characteristics of triploid hybrid groupers.The growth performance of these two different ploidy hybrid grouper populations was analyzed through a comparison culture using hybrid grouper triploids(JH-3N)and diploid populations(JH-2N),while multivariate statistical analysis was also employed to statistically analyze the morphological characteristics of JH-3N,JH-2N and the maternal Epinephelus fuscoguttatus(EF)and paternal Epinephelus tukula(ET).The results showed that the terminal body weight of the JH-3N was 9.59％higher than that of the JH-2N after the 90-day of comparative culture.Histological observation of the gonads showed that the development of the JH-3N ovaries was significantly delayed compared to that of the JH-2N during the same period.The Chi-square test demonstrated that none of the seven countable traits exhibited significant differences between the JH-3N and JH-2N populations and their parents.The one-way ANOVA demonstrated that the four grouper groups exhibited statistically significant differences(P＜0.05)in 18 proportional traits,with the exception of M14(anterior base of anal fin to caudal fin length).The results of the cluster analysis indicated that the JH-3N group was a discrete entity,distinct from the other three groups.Principal component analysis yielded a total of three principal components,which collectively contributed 63.273％to the total variance,which mainly reflected the dorsoventral axis morphological variables of the fish.The results of the discriminant analysis demonstrated that the four grouper groups exhibited 100％discrimination accuracy,and the comprehensive discrimination rate was also 100％.The results demonstrated that JH-3N exhibited superior growth rates and delayed gonad development,while displaying distinct phenotypic traits from those of JH-2N.These suggests that JH-3N has the potential for commercialisation and application in production.The findings of this study provide a wealth of basic biology data for the hybrid ploidy breeding and population identification of hybrid grouper.
维普
万方数据