摘要
以自行配组获得的尼萨F2家系与混合后代为材料,比较了不同交配方式后代幼鱼的耐盐性能、不同盐度下生长差异。结果显示,尼萨F2家系与混合后代的平均存活时间(MST)、50%存活时间(ST50)、96 h半致死盐度(MLS-96)均显著高于对照组尼罗罗非鱼。除家系2显著高于混合后代外,各家系的耐盐指标MST、ST50和MLS-96与混合后代间无显著差异(P>0.05)。除0 g/L下家系5的日均增重率显著高于混合后代外,同一盐度(15,20,25 g/L)下,各家系的日均增重率与混合后代间均无显著差异(P>0.05),尼萨F2体重变异系数在25 g/L盐度下表现最低。研究结果为尼萨杂交育种与生产利用提供了基础资料。
F 2 family offsprings and mixed group were obtained by paired and mixed mating the hybrid F 1 individuals of Oreochromis niloticus ♀ × Sarotherodon melanotheron ♂,respectively. The salt tolerance and growth under different salinities( 0,15,20,25 g / L) of juvenile fishes from two mating modes were compared. The results showed that MST,ST 50,MLS-96 of O. niloticus ♀ × S. melanotheron♂ F 2 were higher than that of the control group O. niloticus( P < 0. 05). No significant differences in MST,ST 50 and MLS-96 indexes were observed between the family offsprings and mixed group( P > 0. 05) except for the family 2. Under the same salinity conditions,there wasn't significant difffernces in the average growth rate between the family offsprings and mixed group( P > 0. 05) with a exception of family 5 in 0 g / L sanility,O. niloticus ♀ × S. melanotheron♂ F 2 exhibited the lowest weight coefficient of variation at 25 g / L sanility. The results provided some basic data for hybrization and utilization of O. niloticus × S. melanotheron.
出处
《华北农学报》
CSCD
北大核心
2013年第S1期278-282,共5页
Acta Agriculturae Boreali-Sinica
基金
现代农业产业技术体系专项资金项目(CARS-49-4B)
上海高校知识服务平台上海海洋大学水产动物遗传育种中心项目(ZF1206)
关键词
尼萨F
2
家系
混合后代
耐盐
生长
Oreochromis niloticus ♀ × Sarotherodon melanotheron ♂ F 2
Family offsprings
Mixed group
Salt tolerance
Growth
