摘要
将6个刺参幼参全同胞家系置于E1(高密度,自然光周期)、E2(低密度,全黑暗)和E3(低密度,自然光周期)3种不同环境下养殖60 d,通过建立模型分析环境、基因型及环境与基因型互作对刺参幼参成活率、生长性状的特定生长率和变异系数的影响。结果表明:环境、基因型及其互作对刺参幼参成活率无显著性影响(P>0.05);环境对刺参幼参体长和体重的特定生长率有极显著性影响(P<0.01),对其变异系数无显著性影响;基因型对刺参幼参体长和体重的特定生长率、体长变异系数有极显著性影响,对刺参幼参体重变异系数有显著性影响(P<0.05);基因型与环境互作对刺参幼参体长和体重的特定生长率、变异系数均无显著性影响,因此实验室育种过程中可忽略家系与环境(光周期和密度)互作的影响;E3环境下有利于刺参幼参的生长,其体长和体重的平均特定生长率可达0.03%和1.58%。本研究为刺参家系育种和建立刺参健康养殖模式提供理论依据。
In this study, six genotypes of young sea cucumber （Apostichopus japonicus） were exposed to three laboratory environments （high stocking density and natural light cycle, E1; low stocking density and dark, E2; and low stocking density and natural light cycle, E3） for 60 days, and a model was established to investigate the effects of environment, genotype, and their interaction on the survival rate and the specific growth rate （SGR） and coefficient of variation of growth traits （body length and body weight） of the young sea cucumbers. Environment, genotype, and their interaction had no significant effects on the survival rate of the sea cucumbers （P〉0.05）. Environment had significant effects on the SGR, but less effects on the coefficient of variation of growth traits, whereas genotype had significant effects on the SGR and the coefficient of variation of growth traits. No significant effects of genotype-environment interaction were recorded for the SGR and the coefficient of variation of growth traits （P〉0.05）. The SGR of the body length and body weight was the highest in the E3, with the average SGR being 0.03% and 1.58%, respectively. It was suggested that genotype × environment （light cycle and stocking density） interaction could be ignored when planning a breeding program for sea cucumber under laboratory conditions. This study provided theoretical basis for the family breeding of A. japonicus and the construction of healthy aquaculture mode.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第7期1819-1824,共6页
Chinese Journal of Ecology
基金
国家高技术研究发展计划项目(2012AA10A412)资助
关键词
家系
环境与基因型互作
变异系数
特定生长率
family
environment-genotype interaction
coefllcient of variation
specific growth rate.
