虾夷马粪海胆F_3代群体数量性状相关性与通径分析  

Correlation and Path Analysis of Quantitative Characters Among F_3 Generation of Sea Urchin Strongylocentrotus intermedius

作　　者：沈妍[1] 丁君[1] 张伟杰[1] 常亚青[1] 

机构地区：[1]大连海洋大学/农业部北方海水增养殖重点实验室,辽宁大连116023

出　　处：《农学学报》2013年第4期42-47,共6页Journal of Agriculture

基　　金：国家自然科学基金"海胆性腺脂肪酸相关基因克隆与表达"(30972269);辽宁省科技计划"海胆高效增养殖及食品安全保障技术研究"(2007203004);辽宁省"百千万人才工程"资助项目"海胆重要抗病功能基因的克隆与应用"(2008921059)

摘　　要：为更全面地分析虾夷马粪海胆F3代的生长与性腺品质,研究测量了虾夷马粪海胆F3代群体12个家系82枚海胆的体尺性状和性腺主要营养成分,其中体尺性状包括壳性状(壳高、壳径、壳湿重、壳干重),口器性状(口器高、口器宽、口器重),体重和性腺湿重;营养成分性状包括性腺中的总脂肪含量、总蛋白含量和4种高不饱和脂肪酸含量(C20:4、C20:5、C22:5、C22:6)。计算了F3代虾夷马粪海胆不同性别体尺性状、营养成分的均值、标准差和变异系数,并对数量性状间的相关关系进行了分析。结果显示:虾夷马粪海胆F3代群体各性状中,雌性群体各性状指标略优于雄性群体,但不同性别间均无显著性差异(P>0.05)。F3代虾夷马粪海胆各体尺性状之间均存在极显著的相关性(P<0.01),其中壳径与体重之间相关性最大(0.878),而口器性状与体重的相关性相对较小。营养成分方面,C20:4(AA)和C20:5(EPA)之间相关性极为显著(P<0.01);C22:5和C22:6(DHA)之间显著相关(P<0.05),即同碳原子数的不饱和脂肪酸的含量相关显著。营养成分性状与壳高、壳径和体重的相关性均不显著(P>0.05),且多为负相关,在选择育种时应分别考虑。研究结果为虾夷马粪海胆选育潜力评估和下一步选种提供依据,为富含高不饱和脂肪酸虾夷马粪海胆培育奠定理论基础。To analyze the quality of growth and gonad among F3 generation of sea urchin Strongylocentrotus intermedius comprehensively, 82 sea urchins Strongylocentrotus intermedius were randomly chosen from 12 families, the body traits and the main nutrients of gonad were measured and then analyzed. The body traits include test traits （test height, test diameter, test wet weight, test dry weight）, Aristotle＇s lantern traits （Aristotle＇s lantern height, Aristotle＇s lantern diameter, Aristotle＇s lantern weight）, body weight and gonad wet weight. The nutrition traits include total protein content, total fatty content and four kinds of high polyunsaturated fatty acid （C20：4, C20：5, C22：5, C22：6） composition of the gonad. The mean, standard deviation and coefficient of variation of body traits and nutrition traits between different genders were calculated among F3 generation of sea urchin StrongyIocentrotus intermedius, and the correlation of quantitative characters was analyzed. The results showed that, among F3 generation of sea urchin Strongylocentrotus intermedius, the female group＇ s traits were a little better than the male＇ s, but not significant （P〉0.05）. The body traits were highly significantly correlated （P〈0.01）. The correlation between test diameter and weight was the most significant, and between Aristotle＇ s lantern and weight was less significant. About the nutrient composition, the correlation between C20：4 （AA） and C20：5 （EPA） was highly significant （P〈0.01）; and between C22：5 and C22：6 （DHA） was significant （P〈0.05）. It might show that the content of high polyunsaturated fatty acid would correlate significantly when having the same number of carbon atom. Among the nutrient composition, test height, test diameter and weight, there was no significant correlation （P^0.05）. And most of the correlation was negtive. So it should be considered seperately when carrying out the selective breeding. The results provided a basis for evaluat

关 键 词：虾夷马粪海胆 体尺性状 性腺性状 相关分析 通径分析 

分 类 号：S968.9[农业科学—水产养殖]