| Abstract: |
The present study was conducted at the rabbit farm belonging to theDepartment of Animal Wealth Development, Faculty of Veterinary Medicine,Zagazig University, through the period from April 2006 to April 2007.The experimental flock composed of four rabbit breeds, namely New ZealandWhite, Californian, V -Line and El-Gabali. The first two breeds obtained from San-El-Hagar Agricultural company farm, Sharkiya Governorate, Egypt. The third oneobtained from Vvl.ine stock of Faculty of Agriculture, Alexandria University origin,while El-Gabali breed obtained from Faculty of Agriculture, Moshtohor, BanhaUniversity.The main objective of this work was to evaluate the performance of purebredsversus crossbreds, in addition to the effect of sex on productive traits including (bodyweight, relative growth rate and average daily gain), as well as carcass traitsincluding (slaughter weight, dressing percentage, chilled, hot carcass weight, andorgans percentage, carcass cuts including forepart, intermediate part and hind part), inaddition to blood biochemical parameters (total protein, Albumin, Globulin, AI Gratio, cholesterol and total lipids). Also, estimation of heterosis for crossbreds andreciprocal crossbreds as well as, combining ability for previously mentioned traits.Reproductive traits of doe including (doe weight at first mating, number of servicesper conception, conception rate percentage, kindling rate percentage, kindlinginterval, gestation length, lit!er size at birth, litter birth weight, born alive, born deadand litter size at weaning).This study revealed the following main outcomes:•New Zealand white showed significant (p < 0.05) higher weaning weight (669.50 g) in comparing with Californian (598.61 g) and V-Line (440.50 g). Gabali rabbitrecorded the highest value of body weight at 6th (1219.41 g), loth (2000.58 g) and
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