Abstract: To assess growth performance of hybrid progeny of grass carps from ten different geographical origins (Foshan population, Zhaoqing population, Jingzhou population 1, Jingzhou population 2, Jingzhou population 3, Ezhou population, Yiyang population, Changsha population 1, Changsha population 2 and Jiangsu population), fifteen hybrid combinations were constructed and cultured in the same pond. Body mass was measured at the age of 4, 7, 8, 10, 12, 15 and 18 months. Using body mass at the age of 4 months as covariant, growth performance of hybrid progeny was analyzed by covariance analysis. The results showed that the average body mass of Jingzhou population 2♀×Foshan population♂ was 1892.90 g at the age of 18 months and was 3.51%~32.36% higher than that of other hybrid progeny. Multiple comparison analysis showed that average body mass of hybrid progeny of Jingzhou population 2 ♀ × Foshan population ♂ and Jingzhou population 1♀× Foshan population♂ were significantly higher than that of other hybrid progeny (P＜0.05). Jingzhou population 2♀× Foshan population♂ and Jingzhou population 1♀×Foshan population♂ were the optimized choice to produce high quality fry. The results will lay foundation for seeking Ctenopharyngodon idella populations who have rapid growth.