Abstract: F₂ family offsprings and mixed group were obtained by paired and mixed mating the hybrid F, individuals of Oreochromas ualotacus × Sarotherodou melauotherou a,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, STS,MLS6 of 0. uiloticus×S. melauotherou a Fz were higher than that of the control group 0. ualotacus(P<0.05).No significant differences in MST, STS。 and MLS}6 indexes were observed between the family offsprings and mixed group ( P>0.05)except for the family 2. Under the same salinity conditions,there warn’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 senility, uiloticus × S. melauotherou a Fz exhibited the lowest weight toefficient of variation at 25 g/L senility. The results provided some basic data for hybrization and utilization of 0.uiloticus × S. melauotherou.

Key words: Oreochromas nilotacus ♀ ×, Sarotherodou melauotherou ♂ F₂, Family offsprings, Mixed group, Salt tolerance, Growth

CLC Number: 

• S917.01