Abstract: To measure organ weight and organ coefficient of outbred Wuzhishan mini-pigs (WZSPs), and analyze the factors that affect organ weight and organ coefficient.74 common WZSPs(43 males and 31 females) were chosen for this study, and the body weights and 6 organs weights were determined, then the organ coefficients were counted. Based on ages and body weights, difference, correlation, and regression analysis in organ weights and organ coefficients were performed respectively. Only few organ weights of different aged animals showed significant differences between males and females (P<0.05), but there was no significant difference for the organ coefficients(P＞0.05). Results of ANOVA showed that organ weights increased significantly in accordance with the growths and increases of body weighs(P<0.0001); and the organ coefficients of heart, liver, lung, and stomach decreased significantly with the growth of animals(P<0.0001), but the decreases of spleen and kidney coefficients were not significant(P＞0.05); while all the organ coefficients decreased significantly with increases of body weights(P<0.01). Multiple regression analysis demonstrated that organ weight and organ coefficient of the same organ were affected by body weight on different levels. Among the effect factors on organ weights and organ coefficients, the effects of sex differences were mild, while age and body weight showed great effects, and body weights were the key factors. Organ weights increased significantly and organ coefficients turned opposition in accordance with the increases of body weighs.

Key words: Wuzhishan mini-pigs; organ weight; organ coefficient; statistical analysis