【目的】测定牛蛙(Rana catesbeiana)脏体指数并分析各量化表征间的关系，获取牛蛙的选育指标。【方法】将42只雌性牛蛙和38只雄性牛蛙进行实验解剖并获取体长、体宽、头长、体质量和脏器质量的量化数据后，采用独立样本t检验、Mann-Whitney U检验、多元回归等统计学方法对牛蛙量化表征间的关系进行分析。【结果】牛蛙各量化表征间的相关系数具有统计学意义(p<0.01)；雄性牛蛙的头长-体长比值与双肺指数均比雌性牛蛙的这两项指标更高，且数据差异均具有统计学意义(p<0.01)；雌性牛蛙的生殖腺指数比雄性牛蛙的该项指标更高，数据差异具有统计学意义(p<0.01)。与雌性牛蛙体质量密切相关的主要量化表征为：体宽、头长、脂肪体质量、生殖腺质量与双肺质量；与雄性牛蛙体质量密切相关的主要量化表征为：体宽、体长、脂肪体质量、心脏质量与双肺质量。【结论】体质量、体长、体宽与头长均可作为牛蛙的选育指标，其中体质量是首选选育指标，体宽则为次选选育指标。
［Purposes］It measured the visceral organs index of Rana catesbeiana and analyzed the relationship between various quantitative characteristics, and obtained breeding indicators for R. catesbeiana. ［Methods］After dissecting 42 female and 38 male bullfrogs and obtaining the quantifiable data of body length, body width, head length, body mass and organ mass, the relationship between those different quantifiable characteristics of R. catesbeiana were analyzed based on several statistical methods such as independent sample t-test, Mann-Whitney U-test and multiple regression analysis. ［Results］All the correlation coefficients between each pair of quantifiable characteristics were significant (p<0.01). The head-to-body ratio and bilateral lung index of the males were larger than that of the females, and the differences were significant (p<0.01). The gonad index of the females was larger than that of the males, and the difference was significant (p<0.01); while there was no significant difference in liver index, heart index, kidney index and fat body index between the males and the females. The main quantifiable characteristics most closely related to the body mass for females were body width, head length, fat body mass, gonad mass and bilateral lung mass, however, the main quantifiable characteristics most closely related to the body mass for males were body width, body length, fat body mass, heart mass and bilateral lung mass. ［Conclusions］According to the above series of studies, it was conclude that there are many factors that affect the body mass of the females and the males. Except those common factors (such as body width and fat body mass), some different ones (such as head length, gonad mass and heart mass) were found for those female and male individuals, which indicated that there were certain sexual differences existed in the main characterization components that affect body mass. Based on the above studies, it was conclude that body mass, body length, body width and head length could be used as breeding indicators in the breeding of R. catesbeiana, among which body mass was the preferred breeding indicator, and body width was the secondary breeding indicator.