摘要
通过测量中华鳖黄沙品系、鄱阳湖品系及其杂交后代的9项形态学性状,采用主成分分析和逐步判别分析方法比较不同品系中华鳖的外部形态特征。主成分分析表明,构建的3个主成分累计贡献率为73.60%,第一、二、三主成分分别反映体型特征、裙边特征和眼部特征,方差贡献率分别为38.36%、24.20%和11.04%。利用逐步判别分析法创建了3个品系的判别函数,初始验证判别准确率分别为73.3%、76.7%和66.7%。受遗传因素的影响,杂交鳖与亲本鳖的误判率较高。判别分析显示,中华鳖黄沙品系和鄱阳湖品系的初始验证判别准确率分别为93.3%和96.7%。该研究证实了体型、裙边等因子是影响中华鳖生长的重要指标,建立的中华鳖黄沙品系和鄱阳湖品系判别方程效果良好,为中华鳖黄沙品系与鄱阳湖品系亲本的杂交选育提供了理想的测量指标和理论依据。
Nine morphological traits of Huangsha strain,Poyang Lake strain of Pelodiscus sinensis and their hybrid offsprings were measured,and the external morphological characteristics of different strains of P.sinensis were compared by using the methods of principal component analysis and discriminant analysis.The principal component analysis showed the cumulative contribution rate of three principal components was 73.60%,the contributory rates of the first,second,third principal components reflected body shape characteristics,apron width characteristics and eye characteristics respectively,their variance contribution rates were 38.36%,24.20%and 11.04%respectively.The discriminant function of 3 strains were established by using stepwise discriminant analysis,the discriminant accuracy of Huangsha strain,Poyang Lake strain and their hybrid offsprings by initial test were 73.3%,76.7%and 66.7%,respectively.Under the influences of genetic factors,the misjudgment rate of hybrid and parent soft-shelled turtles were higher.The results of discriminant analysis showed that the discriminant accuracy of Huangsha strain and Poyang Lake strain by initial test were 93.3%and 96.7%,respectively.This study proved that the body shape and apron width were important morphological traits that affected the growth of P.sinensis,the established discriminant equation for Huangsha strain and Poyang Lake strain had good effects,which provided ideal measurement indices and theoretical basis for the hybrid breeding of Huangsha strain and Poyang Lake strain of P.sinensis.
作者
阙江龙
付辉云
张燕萍
习宏斌
贺刚
QUE Jiang-long;FU Hui-yun;ZHANG Yan-ping(Fisheries Science Research Institute of Jiangxi Province,Nanchang,Jiangxi 330039;Jiangxi Protection and Rescue Center of Hydrobiology,Nanchang,Jiangxi 330096)
出处
《安徽农业科学》
CAS
2022年第8期77-80,共4页
Journal of Anhui Agricultural Sciences
基金
江西省重点研发计划项目(20192BBF60022)
江西省科技重点计划项目(20161BBF60104)。
关键词
中华鳖
形态分析
主成分分析
判别分析
Pelodiscus sinensis
Morphological analysis
Principal component analysis
Discriminant analysis
