Growth performance was compared in four groups of F1 generation of Macrobrachium rdpponense from Taihu Lake (T) and Poyang Lake(P) populations by complete diallel crosses. The results showed that the group of F1 generation from T( ♀ ) × P( ♂ ) (TP) had the largest body length and weight gain and the fastest growth speed, which were significantly larger and faster than those of P( ♀ ) × T( ♂ ) (PT) and inbreeding groups. The coefficient of variation of PT group in length and weight increased accompanying with the increase of month age, while the growth coefficient of variation and discrete degree of TP group always kept lower among four groups. The correlation of body length and weight accorded with the power function W = aLb with very high relativity. The relation of body length and weight inrcease accompanying with farming time met exponential relationship L/W =ceD△t , and the related coefficient of TP and PT groups was significantly higher than that of inbreeding ones. All of above, the obvious beterosis in growth performance could be achieved through the cross of M. nipponense populations betWeen Taihu Lake( ♀ ) and Poyang Lake( ♂ ).%比较了日本沼虾(Macrobrachium nipponense)太湖群体和鄱阳湖群体完全双列杂交F1代4个组合的生长性能.结果显示:太湖♀×鄱阳湖♂(TP)的F1代体长、体重的增加量最大,生长速度最快,显著大于鄱阳湖♀×太湖♂(PT)及自繁F1代,表现出显著的杂交优势(P<0.05);PT组合的体长、体重变异系数随月龄增加而逐渐增大,生长离散程度变大,而TP组合生长离散程度较小;各组合体长与体重的关系符合W=aLb;体长、体重随养殖时间的增加符合指数函数L/W=ce d△t,TP组合和PT组合的系数均显著大于自繁组合.结果表明,将日本沼虾太湖群体作为母本,鄱阳湖群体作为父本进行杂交,可获得显著的杂交优势.
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