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吉富罗非鱼家系选育3代后形态性状变异及其对体质量的影响
引用本文:李灵玲,董在杰,苏胜彦,徐跑,梁政远,马良骁,刘伟,张建桥.吉富罗非鱼家系选育3代后形态性状变异及其对体质量的影响[J].水产学报,2012,36(4):489-496.
作者姓名:李灵玲  董在杰  苏胜彦  徐跑  梁政远  马良骁  刘伟  张建桥
作者单位:南京农业大学无锡渔业学院;中国水产科学研究院淡水渔业研究中心,农业部淡水鱼类遗传育种和养殖生物学重点开放实验室;中国水产科学研究院淡水渔业研究中心,农业部淡水鱼类遗传育种和养殖生物学重点开放实验室;南京农业大学无锡渔业学院;中国水产科学研究院淡水渔业研究中心,农业部淡水鱼类遗传育种和养殖生物学重点开放实验室;南京农业大学无锡渔业学院;南京农业大学无锡渔业学院;南京农业大学无锡渔业学院
基金项目:现代农业产业技术体系建设专项资金(CARS-49); 中央级公益性科研院所基本科研业务费专项资金项目(2007JBFA01); 农业部淡水鱼类遗传育种和养殖生物学重点开放实验室开放课题(BM2007-01)
摘    要:以吉富罗非鱼引进群体(P)及其家系选育第三代(F3)为实验对象, 测定了群体的体质量(Y)、体长(X1)、体宽(X2)、体高(X3)4个性状, 通过相关分析、通径分析和回归分析, 计算相关系数、通径系数和决定系数, 建立多元回归方程, 对P和F3间形态性状及其对体质量的影响程度进行对比分析。结果显示: 1) 与亲本相比, F3体质量、体长、体宽和体高4项指标都有显著提高, 同时变异系数有一定下降, 体型趋于一致, 其中雌性变化较大。2) F3较P 3项形态性状指标对体质量影响最大者均由体高×体长变为体长。3) 与P相比, F3体长、体宽和体高3项形态性状对体质量的影响力有所下降。

关 键 词:吉富罗非鱼    相关分析    通径分析    多元回归
收稿时间:2011/9/12 0:00:00
修稿时间:2011/12/8 0:00:00

Morphological variation and mathematical analysis of effects of morphological traits on body-weight of GIFT tilapia after 3 generations of breeding
LI Ling-ling,DONG Zai-jie,SU Sheng-yan,XU Pao,LIANG Zheng-yuan,MA Liang-xiao,LIU Wei and ZHANG Jian-qiao.Morphological variation and mathematical analysis of effects of morphological traits on body-weight of GIFT tilapia after 3 generations of breeding[J].Journal of Fisheries of China,2012,36(4):489-496.
Authors:LI Ling-ling  DONG Zai-jie  SU Sheng-yan  XU Pao  LIANG Zheng-yuan  MA Liang-xiao  LIU Wei and ZHANG Jian-qiao
Institution:1(1.Wuxi Fishery College,Nanjing Agriculture University,Wuxi 214081,China; 2.Open Fund of Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes,Ministry of Agriculture, Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences,Wuxi 214081,China)
Abstract:GIFT strain of Nile tilapia (Oreochromis niloticus) played an important role in world fishery. Several researches indicated that the growth performance of GIFT can still be improved. As an important indicator of breeding, body-weight was influenced by many morphological traits, and morphological traits that impact offspring body-weight might be changed after breeding, so comparative analyses of the impacts of morphological traits on body-weight between the offspring and parental generation became necessary. Sixty families of GIFT were introduced into FFRC as the parents (P) in 2006 for further study, three generations of offspring were bred (F1, F2, F3). In order to observe the achievement of breeding, body- weight (Y), body-length (X1), body-thickness (X2) and body-height (X3) of the P and F3 were measured, variation of four morphological traits of P and F3 were analyzed; correlation analysis, path analysis and regression analysis were used to calculate the correlation coefficient, path coefficient and the coefficient of determination, and the multiple regression equations between body-weight(Y) and morphological traits(X1, X2, X3)were established and analyzed. Results showed that: 1) compared with P, body-weight, body-length and body-thickness of F3 had a significant increase (P<0.01), meanwhile a certain decline in the coefficient of variation (CV) was observed, body size of tilapia of F3 showed a trend of being consistent. Male of F3 had increased in some degree, significant increase of 4 traits of the male group was not observed. 2) Trait affected the body-weight most of F3 converted to body-length, which was body-height×body-length in P. 3) The influence of body-length, body-thickness and body-height on body-weight declined more in F3 than that in P. Results above indicated that, breeding made a positive effect on the growth speed of GIFT; for further study we should be more careful in selecting morphological traits, and some other morphological traits which might impact the body-weight should be taken into account for more accurate breeding project.
Keywords:GIFT strain of Nile tilapia  correlation analysis  path analysis  multiple regression
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