In the present study,the morphologic characteristics and gonadal development of the F1 hybrids (Megalobrama amblycephala (♀) × Parabramis pekinesis (♂)) were investigated and compared with the parents.Through variance analysis,principal component analysis and cluster analysis,it was found that there were no significant morphological differences between F1 fish and their parents (P>0.05).Cluster analysis showed that the F1 hybrids were more similar with the female M.amblycephala in morphology; however,they also inherited the whole abdominal edge feature of paternal P. pekinesis.The gonadal development of F1 hybrids at one and two years old was observed by macroscopic and microscopic examination.At one year old,most testis and oraries were at stage Ⅱ and Ⅲ.At two years old,most testis and oraries were developed at stage Ⅳ,and there were unilateral and uneven development of both ovaries and testis in F1 hybrids.This study would be beneficial to the breeding of M.amblycephala.