铜锈环棱螺形态性状对体质量的影响分析

Analysis on Influence of Morphological Traits on Body Weight of Snail Bellamya aeruginosa

为探究铜锈环棱螺不同群体主要形态性状间的相关性及影响其体质量的主要因素,随机选取微山湖、东平湖、骆马湖、洪泽湖、长江江都区段和滇池的野生铜锈环棱螺,测量其壳高、壳宽、壳厚、壳口长、壳口宽及体质量,采用相关分析与通径分析方法,并建立体质量的最优多元回归方程。试验结果显示,壳厚与体质量相关性不显著,壳高、壳宽、壳口宽和壳口长均与体质量相关性极显著。6个群体的决定系数总和分别为0.916、0.927、0.794、0.886、0.810和0.783,表明已分析出影响体质量的大部分形态性状。铜锈环棱螺体质量性状的主要影响因素在6个群体中并不相同,其中壳高或壳宽对体质量的影响作用比较大,是铜锈环棱螺体质量的主要影响因素。经多元回归方差分析和偏回归系数显著性检验,偏回归系数极显著(P<0.01)。本试验结果可为铜锈环棱螺的品种选育提供参考依据。

In order to explore the correlationship between the main morphological characters and the main factors affecting body weight in wild snail Bellamya aeruginosa,shell height,shell width,shell thickness,aperture length,aperture width and body weight were measured in the samples of the snail collected from different populations,including Weishan Lake,Dongping Lake,Luoma Lake,Hongze Lake,Jiangdu Changjiang River and Yunnan Dianchi Lake.The optimal multiple regression equation was established by the correlation and path analysis methods.The results showed that there were highly correlated between the shell height,shell width,aperture width and aperture length with body weight,without significant correlation between shell thickness and body weight.The sum of the coefficients of determinationΣd i was 0.916,0.927,0.794,0.886,0.810 and 0.783 in the six populations,respectively,indicating that most of the traits affecting body weight were analyzed.In six different populations,the main factor influencing body weight of the snail was different,shell height or shell width being the greater factors affecting on body weight,which is the main influencing factor of body weight of Bellamya aeruginosa.By multiple regression analysis of variance and significance test of partial regression coefficient,the partial regression coefficient was very significant with P value of less than 0.01.The findings provide reference for the selection and breeding of varieties of Bellamya aeruginosa.