CAJ | 학술논문

随机抽取三疣梭子蟹(Portunus trituberculatus)抗病候选群F2代(F2S)120只及普通养殖群(RS)88只,对其头胸甲宽X1、头胸甲长X2、螯足长X3、Ⅰ步足长X4、Ⅱ步足长X5、Ⅲ步足长X6、游泳足长X7、中额齿间距X8、两侧额齿间距X9、下额齿间距X10、体质量Y等11个生长性状进行测量,计算每个群体内性状间的相关系数。采用通径分析方法计算,以形态性状为自变量对体质量作依变量的通径系数和决定系数,并进行各性状对体质量影响大小的分析。结果表明,两个群体所选的10个参数均与体质量显著相关。通径分析显示头胸甲宽对F2S群体质量影响最大,Ⅱ步足长对RS群体质量影响最大,他们的通径系数分别为0.498和0.609。间接通径分析表明Ⅲ步足长和两侧额齿间距分别对F2S群和RS群体质量间接影响最大。经逐步多元回归分析,两个群体各有4个参数对体质量的回归分析达到显著水平,并建立了两个不同的回归方程, F2S群： Y =-108.331＋8.259 X1＋11.372 X4＋8.382 X7-37.098 X9。RS群：Y=-106.763＋7.725 X1＋18.452 X5-73.358 X9＋45.877 X10。回归方程可以为三疣梭子蟹遗传育种提供一定的理论基础。
수궤추취삼우사자해(Portunus trituberculatus)항병후선군F2대(F2S)120지급보통양식군(RS)88지,대기두흉갑관X1、두흉갑장X2、오족장X3、Ⅰ보족장X4、Ⅱ보족장X5、Ⅲ보족장X6、유영족장X7、중액치간거X8、량측액치간거X9、하액치간거X10、체질량Y등11개생장성상진행측량,계산매개군체내성상간적상관계수。채용통경분석방법계산,이형태성상위자변량대체질량작의변량적통경계수화결정계수,병진행각성상대체질량영향대소적분석。결과표명,량개군체소선적10개삼수균여체질량현저상관。통경분석현시두흉갑관대F2S군체질량영향최대,Ⅱ보족장대RS군체질량영향최대,타문적통경계수분별위0.498화0.609。간접통경분석표명Ⅲ보족장화량측액치간거분별대F2S군화RS군체질량간접영향최대。경축보다원회귀분석,량개군체각유4개삼수대체질량적회귀분석체도현저수평,병건립료량개불동적회귀방정, F2S군： Y =-108.331＋8.259 X1＋11.372 X4＋8.382 X7-37.098 X9。RS군：Y=-106.763＋7.725 X1＋18.452 X5-73.358 X9＋45.877 X10。회귀방정가이위삼우사자해유전육충제공일정적이론기출。
120 crabs from the second generation of candidate disease-resistance stock which were screened by Vi-brio alginolyticus in our lab (F2S) and 88 regular stock crabs(RS) were randomly collected for measuring 11 mor-phormetric traits including the carapace width(X1), carapace length(X2), cheliped length(X3), first walking leg length(X4), second walking leg length(X5), third walking leg length(X6), natatorial leg length(X7), mid frontal emi-nence spine width(X8), zygomorphic frontal eminence spine width(X9), nether frontal eminence spine width(X10) and body weight(Y). The correlation coefficients among the traits were calculated, and then path analysis was conducted by taking the body weight as a dependent variable, and other ten morphometric traits as independent variables. The results showed that all of the morphometric traits are significantly correlated with body weight in both two stocks. The carapace width(0.498) and second walking leg length(0.609) have the strongest direct effects on body weight of F2S and RS, respectively, while third walking leg length and zygomorphic frontal eminence spine width have the strongest indirect effects. Four morphormetric traits were significantly on the multiple regression relationship both in two stocks. Based on this result, multiple regression equations were established as follows:F2S:Y=-108.331+8.259 X1+11.372 X4+8.382 X7-37.098 X9; RS: Y=-106.763+7.725 X1+18.452 X5-73.358 X9+45.877 X10 . This paper provides a theoretical tool to measure breeding crabs in aquaculture.