岱山等边浅蛤形态与重量性状参数的相关性及通径分析

2015-10-21 19:57:36蒋寿佳张建设陈永久吴常文
安徽农业科学 2015年5期

蒋寿佳 张建设 陈永久 吴常文

摘要 为了研究等边浅蛤数量性状间的相关性及影响产量的因素组成,随机选取130只12月龄浙江岱山野生等边浅蛤的分别测量表型性状壳长(X1)、壳高 (X2)、壳宽 (X3)、壳顶至壳前 (X4)、壳顶至壳后 (X5)、韧带长(X6),重量性状活体重(Y1)、软体重(Y2)、壳重(Y3)等性状,并应用遗传相关、多元回归、通径分析等方法进行了分析。结果表明,9个数量性状间的相关系数均达到极显著水平(P<0.001)。对活体重起直接作用最大的是壳长,起直接决定作用,通过壳高的间接决定作用达40.34% 。建立了利用形态性状估计重量性状的回归方程,该结果为等边浅蛤选择育种提供了理论依据,即以提高活体重为目标,主要选择壳长,同时加强对壳高的协同选择。计算相关系数,采用通径分析方法计算以活体重(Y)为依变量、其他性状为自变量的通径系数和决定系数。该研究可为等边浅蛤蛤的养殖和选择育种提供理论依据 。

关键词 等边浅蛤;数量性状;遗传相关;通径分析

中图分类号 S944 文献标识码

A 文章编号 0517-6611(2015)05-0122-03

Correlation and Path Analysis of Daishan Equilateral Shallow Clams Morphology Character Parameters and Weight

JIANG Shoujia,ZHANG Jianshe,CHEN Yongjiu et al (Zhejiang Province Key Laboratory of Marine Farming Equipment and Engineering Technology,Zhejiang Sea Institute,Zhoushan,Zhejiang 316000)

Abstract In order to find out the correlation among the quantitative characters and influencing factors of production of equilateral shallow clams,high phenotypic traits shell length (X1),shell (X2),shell width (X3),before the apex of shell to shell (X4),apex of shell to shell after long (X5),ligament (X6),live weight (Y1),soft weight weight traits (Y2),shell weight (Y3) of 130 randomly selected 12 months Zhejiang Daishan wild equilateral shallow clam were measured.The genetic correlation,multiple regression and path analysis were used to analyze the data.The results showed that the correlation coefficient between measured 9 quantitative traits of both reached extremely significant level (P<0.001).The biggest shell is long to living the restart direct action,the direct decision function,through the role of the indirect decision shell high of 40.34%.Established the regression equation of the weight is estimated based on the morphological character traits,the result provides a theoretical basis for breeding equilateral shallow clams choice,namely to improve the live weight as the goal,mainly choose shell length,at the same time to strengthen the synergy of shell is high.Computing the correlation coefficient,size analysis method is used to calculate the live weight (Y) as the dependent variable and other properties as the independent variable size coefficient and the correlation factor of the experimental results can provide an equilateral shallow clams clams provide theoretical basis for the breeding and selection breeding.

Key words Equilateral shallow clams; Quantitative traits; Genetic correlation; Path analysis

基金項目 科技部支撑计划项目(2011BAD13B08,2012BAB16B02)。

作者简介 蒋寿佳(1989- ),女,江苏盐城人,硕士研究生,研究方向:种质与种苗研究。

收稿日期 20141215

海洋贝类是海水养殖的主要对象之一,贝类养殖业已成为海水养殖的支柱性产业之一,为缓解人口增长所致的食物压力方面扮演着重要的角色。

等边浅蛤(Gomphina aequilatera (Lamarck))隶属瓣鳃纲(Lamellibranchia)、异齿亚纲(Heterodonta)、帘蛤目(Veneroida)、帘蛤科(Veneridae)、浅蛤属(Gomphina),别名沙蛤[1],贝壳呈三角卵圆形,壳质坚、厚、重。两壳膨胀度相对较小,略显扁平状。小月面狭长,呈披针状,楯面不显著。壳顶尖,稍凸出,位于贝壳背缘的中央由壳顶向前、后的边缘直。韧带短而粗,黄褐色,凸出壳面。无放射肋,同心生长纹明显。有时呈现沟纹,壳面颜色变化很大[2]。等边浅蛤属于广温广盐性种类,分布范围极广,在我国南北海岸均分布[3]。南起海南,北至辽宁,是常见品种,生活在潮间带中、下区至浅海的泥沙、特别是沙质海底,营埋栖生活。此外,在日本北海道南部至九州以及朝鲜、越南、印度尼西亚和印度都有分布[4]。……

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