中国水产科学Issue(1)：51-59,9.DOI:10.3724/SP.J.1118.2015.00263
美洲红点鲑和白斑红点鲑及其杂交子代幼鱼的生长曲线拟合
Growth modelling of Salvelinus fominalis and S. leucomaenis juveniles and their hybrid offspring
摘要
Abstract
We studied the growth characteristics of juvenile Salvelinus fominalis and S. leucomaenis and their hybrid offspring from the fertilized egg stage to one year and two months of age (November 2011 to January 2013). Next, we established diallel crosses. The specimens were collected from the water at Bohai station (Bohai Sea). Growth function models(Specialized Logistic, Gompertz, and Von Bertalanffy) were used for fitting the length and weight growth pro-files of S. fominalis and S. leucomaenis juveniles and their hybrid offspring for analysis and comparison of their growth characteristics. The test comprised four groups, AA and BB (selfing groups), AB(A♀×B♂) and BA(B♀×A♂) (hybridi-zation groups). A denotes S. fominalis and B denotes S. leucomaenis. According to the degree of fit during model fitting of the commercial fish, we judged the value of each combination of R2 by comparing their body weights, body lengths, survival rates and relative fatness levels. The sum of residual squares for the models was compared with one another and the Gompertz growth function was the most accurate model for growth fitting with R2>0.99, and an AB group ad-vantage was obvious. At the end of the experiment, the survival rates were AA>AB>BA>BB, with no significant dif-ferences (P>0.05) in the other three AA groups. Comparisons of growth rate (g/d), condition factor (g/cm3), and other growth indicators showed the following trend: AB>AA>BA>BB, and the difference was significant (P<0.05), with relative growth in length and weight increasing with age. Differences in the growth indices showed the same trend. The direct hybrid (AB, A♀×B♂) growth performance was significantly higher than that of the reciprocal hybrid (BA, B♀×A♂) and its parents. Hence, the potential for high economic production in hybrids exists.关键词
美洲红点鲑/白斑红点鲑/种间杂交/生长曲线/生长性能Key words
Salvelinus fominalis/S. leucomaenis/inter-specific hybridization/growth model/growth performance分类
农业科技引用本文复制引用
郭媛,户国,谷伟,白庆利,赵文阁,王炳谦..美洲红点鲑和白斑红点鲑及其杂交子代幼鱼的生长曲线拟合[J].中国水产科学,2015,(1):51-59,9.基金项目
国家公益性(农业)行业专项(201003055) （农业）
