The heritabilities and breeding values of growth traits (including body weight，body length and condition factor) for Megalobrama amblycephala were estimated using mixed family model in this study.The variance analysis of growth traits revealed that variance caused by parents was much greater than that caused by environment at six-month stage.The heritability of body length,body weight and condition factor were 0.72±0.21 (high heritability),0.49±0.14 (moderate heritability) and 0.48±0.14 (moderate heritability) (P＜0.01),meaning that most of the variance for all the three traits was genetic.The phenotypic and genetic correlation coefficient between body weight and body length were 0.89 and 0.98 (P＜0.01),which indicated the correlation between body and body length was caused by genetic.The rank of estimated breeding values varied but not too much among body length,body weight and comprehensive,and most of the top 20 individuals were Poyang population’s offspring.