Effects of morphological traits on body weight in three-month-old black porgy Sparus macrocephalus
WANG Xue1, LI Li1, LIU Yuan-wen1, JIAN Yu-xia1, PAN Lei1, GAO Feng-xiang1, GUO Wen1, HU Fa-wen1, BU Hua-jie2
1.Qingdao Engineering Laboratory of Exploration and Utilization of Marine Germ Plasm Resources, Marine Biology Institute of Shandong Province, Qingdao 266104, China; 2.Luhai Aquatic Technology Development Company of Qingdao, Qingdao 266000,China
Abstract: Body weight(Y) and 8 morphological traits including total length (X1), body length (X2), body height (X3), body width (X4), head length (X5), trunk length (X6), length of caudal peduncle (X7) and depth of caudal peduncle (X8) were measured in three-month-old black porgy Sparusmacrocephalus and the multiple regression relationship between other morphological traits (as independent variables) and body weight (as dependent variables) was analyzed using correlation analysis and path analysis. The results showed that there was a significant positive correlation between morphological traits and body weight， with very significance(P<0.01). The stepwise regression analysis indicated that the optimal linear regression equation was expressed as: Y=-6.347+0.389 X2+1.690X5+0.364X1+0.544X6+0.555X4+0.591X7+0.650X8+0.404X3. The path analysis revealed that body length displayed the maximal positive direct effect (0.288) on body weight, other traits affecting body weight indirectly via body height. The findings indicate that body length and body height should be considered for the indirect selective breeding of body weight in selective breeding of three-month-old black porgy besides body weight.
王雪, 李莉, 刘元文, 菅玉霞, 潘雷, 高凤祥, 郭文, 胡发文, 步华杰. 3月龄黑鲷形态性状对体质量的影响效果分析[J]. 大连海洋大学学报, 2019, 34(2): 233-238.
WANG Xue, LI Li, LIU Yuan-wen, JIAN Yu-xia, PAN Lei, GAO Feng-xiang, GUO Wen, HU Fa-wen, BU Hua-jie. Effects of morphological traits on body weight in three-month-old black porgy Sparus macrocephalus. Journal of Dalian Ocean University, 2019, 34(2): 233-238.
2019, Vol. 34 
