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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。
The F2 population and mixed progeny of Niesa F2 were used as materials to compare the salt tolerance of juvenile with different copulation methods and the growth difference under different salinities. The results showed that the average survival time (MST), 50% survival time (ST50) and 96-h LCI (MLS-96) of F2 generation and mixed offspring of NISA were significantly higher than those of the control. There was no significant difference (P> 0.05) between MST, ST50 and MLS-96 and mixed progenies of salt-tolerant families in all lines, except that line 2 was significantly higher than that of mixed progenies. Except 0 g / L, the daily average weight gain of line 5 was significantly higher than that of mixed progenies. Under the same salinity (15, 20 and 25 g / L) No significant difference (P> 0.05). The coefficient of variation of Nisar F2 had the lowest performance at 25 g / L salinity. The results provided the basic information for hybridization breeding and production in Nisa.