刺参选育群体F_(5)代形态性状与体质量相关性及通径分析  

Correlation and path analyses on morphometric traits and body mass of F_(5) generation breeding population in sea cucumber(Apostichopus japonicus)

作　　者：韩莎 胡炜 李成林 李文文 赵斌 曲红霞 王琦 姚琳琳 HAN Sha;HU Wei;LI Chenglin;LI Wenwen;ZHAO Bin;QU Hongxia;WANG Qi;YAO Linlin(Marine Science Institute of Shandong Province,Qingdao 266104,Shandong,China;Fisheries Technical Service Center of Laiyang City,Yantai 265200,Shandong,China;Extension Station of Fishery Technology of Rushan City,Weihai 264500,Shandong,China)

机构地区：[1]山东省海洋科学研究院,山东青岛266104 [2]莱阳市渔业技术服务中心,山东烟台265200 [3]乳山市水产技术推广站,山东威海264500

出　　处：《浙江大学学报（农业与生命科学版）》2022年第5期653-659,670,共8页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：山东省农业良种工程重点项目(2020LZGC015);国家重点研发计划“蓝色粮仓科技创新”重点专项(2018YFD0901602);山东省乡村振兴科技创新提振行动计划项目(2021TZXD008);山东省现代农业产业技术体系刺参产业技术体系育种岗位(SDAIT-22-01)。

摘　　要：为研究刺参选育群体体长(body length,BL)、体宽(body width,BW)等形态性状对体质量(body mass,BM)的影响,随机选取刺参选育群体F_(5)代个体366头(一龄),对刺参体长、体宽、体质量3个性状指标及1个复合形态指标长宽平方根(square root of the length-width,SLW)进行相关性分析和通径分析。结果显示:性状之间的相关系数均达到显著水平。逐步回归分析表明,体宽、SLW与体质量间的回归关系达到极显著水平(P<0.001),因此建立以体宽和SLW为自变量的最优回归方程BM=-16.14+6.70SLW+4.31BW;形态性状对体质量的直接影响为SLW>BW,SLW是影响刺参体质量的主要因素,其通径系数为0.62,体宽主要通过SLW对体质量实现间接作用;从拟合形态性状与体质量的关系可知,最优幂函数方程为BM=0.39SLW^(2.66)(R2=0.86,P<0.001),表明该生长阶段为负异速生长模式,形态性状生长明显快于体质量增加。因此,在刺参的选育过程中,当以体质量为选育目标时,应把体宽作为直接选择,同时加强对体长的协同选择。In order to explore the relationships between morphometric traits and body mass(BM)of sea cucumber(Apostichopus japonicus),correlation analysis and path analysis were used to obtain the main morphometric traits affecting body mass.Three morphometric traits including body length(BL),body width(BW)and body mass of 366 individuals of F_(5) generation breeding population at one year old were measured,and one compound index that combined body length and body width to produce the square root of the length-width(SLW)index was calculated.The results showed that the correlation coefficients between morphometric traits and body mass were highly significant.The stepwise regression analysis showed that morphometric traits(SLW and body width)and body mass were significantly positive correlations(P<0.001).Based on path coefficients,the multiple linear regression mode equation on the effects of body mass was established as BM=-16.14+6.70SLW+4.31BW.The morphometric traits that directly affected body mass were SLW>BW,and SLW was the main morphometric trait that significantly affected body mass and its path coefficient was 0.62.Body width had an indirect effect on the body mass via SLW.The fitting relationships between morphometric traits and body mass were expressed as following BM=0.39SLW^(2.66)(R2=0.86,P<0.001),showing negative allometry tendency.The results provide valuable information and theoretical guidance for A.japonicus breeding programs.Body width should be selected directly and body length simultaneously,when body mass is the breeding target.

关 键 词：刺参 体质量 形态性状 生长性状 通径分析 

分 类 号：S917.4[农业科学—水产科学]