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[目的]为研究杂交草鱼一龄阶段的生长和体型特点。[方法]建立长江自交YR(长江群体♀×长江群体♂)、珠江自交ZR(珠江群体♀×珠江群体♂)、杂交F1(长江群体♀×珠江群体♂)3个组合,并对其生长和形态数据进行测量分析。[结果]体重、体长及绝对增重率均为F1>ZR>YR;体重、体长,在50日龄组合间差异不显著(P>0.05),在170日龄组合间差异均极显著(P<0.01);绝对增重率,F1分别比ZR、YR高20.00%、50.00%,F1与ZR差异不显著(P>0.05),与YR差异显著(P<0.05);F1在体重上表现明显的超亲杂种优势(20.09%)。3个组合间,体长/全长差异不显著(P>0.05),头长/全长、体高/体长及体宽/体长差异显著(P<0.05),F1表现头短、体高、体宽等特点。[结论]F1在生长性能和体型特征上均具有优势。
[Objective] The research aimed to study the growth and body shape characteristics of the first age stage of hybrid grass carp. [Method] Three combinations of YR (Yangtze River population ♀ × Yangtze River population ♂), ZR (Pearl population ♀ × Pearl population ♂) and F1 hybrid population (Yangtze population ♀ × Pearl population ♂) of the Yangtze River were established. Growth and morphology data were measured and analyzed. [Result] The body weight, body length and absolute weight gain rate were all F1> ZR> YR. There were no significant differences in body weight and body length between the 50-day-old combinations (P> 0.05) (P <0.01). The absolute weight gain rate and F1 were 20.00% and 50.00% higher than those of ZR and YR, respectively. There was no significant difference between F1 and ZR (P> 0.05) The obvious super-heterosis heterosis (20.09%). There was no significant difference in body length / length between the three combinations (P> 0.05), head length / full length, body height / body length and body width / body length (P <0.05) Body width and other characteristics. [Conclusion] F1 had advantages in growth performance and body shape.