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时间:2019-03-05
《近江牡蛎养殖群体数量性状间的相关及通径分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、中国摩学逸提2010,26(6):332—336ChineseAgriculturalScienceBulletin近江牡蛎养殖群体数量性状间的相关及通径分析孙泽伟,郑怀平,杨彦鸿,王迪文,张涛,刘合露,张倩(汕头大学广东省海洋生物技术重点实验室,广东汕头515063)摘要:为了查明近江牡蛎养殖群体数量性状间的相关性及影响产量的因素组成,随机选取140只2.5龄贝,对其形态性状(壳长、壳高、壳宽)和重量性状(活体重、软体重)等5个数量性状进行测量,并应用遗传相关、多元回归、通径分析、决定系数等方法讨论了形态性状对重量性状的影响。结果表明
2、受测的5个数量性状间的相关性均达到显著水平(P<0.05),相关系数从0.16710到0.81988。形态性状对活体重和软体重具有相同的影响:对二者起直接作用最大的均是壳高,其值分别为33.84%和34.20%;对二者起间接作用最大的均为壳长,其值分别为17.84%和13.23%;壳宽的作用最小。多元回归分析建立了壳长()、壳高(xO、壳宽()3个估计活体重()和软体重()的回归方程,分别为::.104.50715+1.29795x~+0.9l435+1-39589局=0.7818),=一10.54062+0.14956Xl+0.143
3、6lx2+0.12205~=0.6008)。研究结果为近江牡蛎选择育种提供了理论依据,即以提高活体重或软体重为目标,主要选择壳高,同时加强对壳长的协同选择。关键词:近江牡蛎;数量性状;遗传相关;多元回归;通径分析;决定系数中图分类号:$968.3文献标志码:A论文编号:2009—2269CorrelationandPathAnalysistoQuantitativeTraitsforaculturedpopulationofJinjiangOysterCrassostreahongkongensisSunZewei,ZhengHuaip
4、ing,YangYanhong,WangDiwen,ZhangTao,LiuHelu,ZhangQiang(CuangdongKeyLaboratoryofMarineBiotechnology,ShantouUniversity,ShantouGuangdong515063)Abstract:Toclarifycorrelationamongquantitativetraitsandcompositionsinfluencingproduction,fivequantitativetraitsincludingthreemorphol
5、ogicaltraits(Shelllength,shellheight,andshellwidth)andtwoweighttraits(Livebodyweightandtissueweight)ofJinjiangoysterCrassostreahongkongens~weremeasuredandanalyzedfrom140randomlychosenindividualsbycorrelationanalysis,multipleregressionanalysis,pathanalysisanddetermination
6、coefficientanalysis.TheresultsshowedthatthereweresignificantcorrelationsfP7、dominanteffectonlivebodyweightandtissueweight,andthevaluewasupto33.84%and34.20%,respectively;shelllengthgaveindirectlypredominanteffectonlivebodyweightandtissueweight,andthevaluewasupto17.84%and13.23%,respectively.Regressionequationsbetweenweightoflivebodyweight()andtiss8、ueweight(均andmorphologicaltraitsofshelllength),shellheight),andshellwidth(∞)werealsoestablished,andequa
7、dominanteffectonlivebodyweightandtissueweight,andthevaluewasupto33.84%and34.20%,respectively;shelllengthgaveindirectlypredominanteffectonlivebodyweightandtissueweight,andthevaluewasupto17.84%and13.23%,respectively.Regressionequationsbetweenweightoflivebodyweight()andtiss
8、ueweight(均andmorphologicaltraitsofshelllength),shellheight),andshellwidth(∞)werealsoestablished,andequa
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