EFFECT OF INBREEDING ON PRE-WEANING BODY WEIGHTS OF BROILER RABBITS
S. Sai Reddy, C. Eswara Reddy, B. Ramesh Gupta and A. Satyanarayana
The effects of litter size at birth, genetic group and level of inbreeding on the body weight at birth, 1, 2, 3 and 4 weeks age of 91 New Zealand White, 94 Soviet Chinchilla, 84 Grey Giant and 47 Flemish Giant bunnies were studied. The overall least square means for body weight at birth, 1, 2, 3 and 4 weeks age were 54.88, 107.07, 155.97, 214.43 and 329.98 g. respectively. Litter size at birth and genetic group of bunny had significant effect on body weight at all pre-weaning ages. Least square means decreased as the litter size increased. The average body weights were highest in Grey Giant and the lowest in Soviet Chinchilla during first three weeks age. Regression of body weight on inbreeding coefficient of progeny was negative and significant at 3 weeks age only. There was a reduction of 1.33 g in body weight at 3 weeks per 1 per cent increase in the inbreeding coefficient. Higher body weights were found to be associated with lower levels of inbreeding.