麦哲伦扇贝形态性状与体质量相关性及通径分析  

Correlation and Path Analysis between Morphological Traits and Body Weight of Scallop Placopecten magellanicus

作　　者：于笛[1] 陈微 滕炜鸣[1] 谢玺[1] 于佐安[1] 李大成[1] 王冲 王庆志[1] YU Di;CHEN Wei;TENG Weiming;XIE Xi;YU Zuoan;LI Dacheng;WANG Chong;WANG Qingzhi(Dalian Key Laboratory of Genetic Resources for Marine Shellfish,Liaoning Ocean and Fisheries Science Research Institute,Dalian 116023,China;College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China)

机构地区：[1]辽宁省海洋水产科学研究院,大连市海产贝类种质资源创新利用重点实验室,辽宁大连116023 [2]大连海洋大学水产与生命学院,辽宁大连116023

出　　处：《水产科学》2023年第3期496-501,共6页Fisheries Science

基　　金：大连市重点研发计划项目(2021YF16SN015,2019J12SN60);大连市揭榜挂帅科技攻关项目(2021JB11SN035);辽宁省渔业科技计划项目(201826);辽宁省农业科学院院长基金资助项目(2020QN2424);财政部与农业农村部现代农业产业体系建设专项(CARS-49).

摘　　要：为查明麦哲伦扇贝形态性状对体质量等经济性状的影响,获得具有优良遗传性状的目标群体,采用相关性分析和通径分析方法,分析麦哲伦扇贝壳长(L)、壳高(h)和壳宽(b)对活体质量(m_(1))、软体质量(m_(2))和闭壳肌质量(m_(3))的影响,建立形态性状对体质量的回归方程。研究结果表明,所有性状间的相关性均为极显著正相关(P<0.01),其中壳长与壳宽之间的相关系数(0.977)最高,壳宽与壳高之间的相关系数(0.852)最低。通径分析结果显示,影响麦哲伦扇贝活体质量、软体质量和闭壳肌质量的主要因素均为壳宽,通径系数分别为0.536、0.387和0.435。对麦哲伦扇贝活体质量和闭壳肌质量间接作用最大的是壳长(0.869和0.702),对软体质量间接作用最大的是壳高(0.776)。壳宽对麦哲伦扇贝活体质量和闭壳肌质量的决定系数最大(0.287和0.189),壳高对软体质量的决定系数最大(0.208)。采用逐步回归方法,建立形态性状对活体质量、软体质量和闭壳肌质量的回归方程:m_(1)=-365.655+2.596h+7.861b,m_(2)=-85.012+0.654L+1.428b,m_(3)=-32.944+0.619b,回归关系均达到了极显著水平(P<0.01)。研究结果可为麦哲伦扇贝的人工选育提供参考。In order to research the effects of morphological traits on body weight and other economic traits of scallop Placopecten magellanicus and obtain a target population with good genetic traits,correlation analysis and path analysis were used to study the impact of shell length(L),shell height(h),and shell width(b)on the the living body weight(m_(1)),soft part weight(m_(2))and adductor weight(m_(3)).The regression equation of morphological traits on body weight was established.The results showed that the correlation among all traits were extremely significant and positive(P<0.01).The correlation coefficient between shell length and width was the highest(0.977),and the correlation coefficient between shell width and height was the lowest(0.852).The results of path analysis showed that shell width was the main factor affecting the living body weight,soft part weight and adductor weight of scallop,with the path coefficients of 0.536 in living body weight,0.387 in soft part weight and 0.435 in adductor weight.Shell length had the largest indirect effect on living body weight and adductor weight of scallop(0.869 and 0.702).Shell height had the greatest indirect effect on soft part weight(0.776).Shell width had the largest determining coefficient on living body weight and adductor weight(0.287 and 0.189),and shell height had the largest determining coefficient on the soft part weight(0.208).Stepwise regression method was used to establish the regression formula of morphological traits to living body weight,soft part weight and adductor weight:m_(1)=-365.655+2.596 h+7.861 b,m_(2)=-85.012+0.654 L+1.428 b,and m_(3)=-32.944+0.619 b,the regression relationship being very significant level(P<0.01).The finding provided a reference for artificial breeding of P.magellanicus.

关 键 词：麦哲伦扇贝 形态性状 体质量 相关性 通径分析 

分 类 号：S968.313[农业科学—水产养殖]