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本文对这60个家系的吉富罗非鱼(Oreochromis niloticus)在生长初期阶段的3个多月时间内的生长情况进行了比较分析,结果显示:经过3个多月的培育,60个家系共1831尾吉富罗非鱼的总体平均体重为102.4±38.9g。第59号家系的平均体重最大,为178.0±40.0g;第9号家系的平均体重最小,为64.1±18.6g。最大个体出现在第59号家系中,为271.7g,最小个体出现在第20号家系中,为22.0g。从家系水平上看,生长速度相差2倍,从个体水平上看,最大个体的体重是最小个体的12倍多。表明吉富罗非鱼各家系及个体间的生长速度存在较大差异,既有进行选育的基础,也有进行长期选育的必要。
In this paper, we compared the growth of Oreochromis niloticus in more than three months of the initial growth period of the 60 pedigrees. The results showed that after more than three months of cultivation, 60 families were 1831 The average body weight of Tail auspicious tilapia was 102.4 ± 38.9g. The average body weight of No. 59 pedigree was the largest, 178.0 ± 40.0g; the average weight of No. 9 pedigree was the smallest, 64.1 ± 18.6g. The largest individual appeared in Family 59, which was 271.7 g, while the smallest individual appeared in Family No. 20, which was 22.0 g. From the pedigree level, the growth rate difference of 2 times, from the individual level, the largest individual’s body weight is 12 times more than the smallest individual. The results showed that there was a big difference in the growth rate among all the families and individuals in the genusFragment, which was the basis of breeding and long-term breeding.