الفهرس 
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Abstract
1. INTRODUCTION
Rabbit is one of the most successful investment projects, especially in recent years because rabbits are characterized by abundant production and rapid growth that are not available in other animals. The importance of rabbits at the national level may be due to solving the problem of the deficits in animal protein (Eman, 2019). Local meat production has failed to satisfy the increased consumption needs. If the need for meat consumption is to be met, much increase in meat production would come from short cycle animals kept by small scale producers. Rabbits have high productive potential since the doe produces a large number of bunnies and carcasses of about 20 to 30 times its weight per annum (Lebas, 1983).
Rabbits can play a significant role in solving the problem of meat shortage in many parts of the world, due to their high potential for reproduction, rapid growth rate, short generation interval, ample nutritional spectrum, limited vital space and ease of rearing. However, pre-and post-weaning mortality until marketing limits the crop of rabbits in kilograms and a lower income would be obtained. (Rashwan and Marai, 2000).
As a result of many years of domestication and crossbreeding, a wide variety of rabbit breeds exist today. Accordingly, a new Egyptian line of rabbits called Moshtohor (M-line) was synthesized, which is considered a synthetic multi-purpose line (Iraqi et al., 2010). This line resulted from crossing Egyptian Sinai Gabali bucks with Spanish V-line does, where the selection was practiced on the crossbreds for litter weight at weaning and live weight at 56 days (Iraqi et al., 2007). Spanish V-line rabbits and their crosses could produce and reproduce efficiently under hot climatic conditions (Khalil et al., 2005; Iraqi et al., 2010).
This study was conducted to investigate the effect of weaning systems , housing systems rabbit breeds on productiye performance, economic efficiency, carcass traits and some blood parameters.