| Abstract: |
The study was carried out in Rabbit Farm, Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, Egypt.Biochemical studies (SDS-PAGE of protein and esterase isozyme) were carried out at Molecular Genetics lab., Genetic Department, Faculty of Agriculture, Ain Shams University, Egypt.Data on 403 kindling produced by 88 does (45 Flander and 43 Rex rabbit) were collected during two successive years of production (2007/2008 and 2008/2009). The present study was carried out to study the effect of breed type, year of kindling, season of kindling, parity- order and sex on doe productive, reproductive traits and post-weaning growth traits, as well as to evaluate the biochemical genetic markers associated with productive and reproductive traits using electrophoretic pattern of proteins and esterase isozymes in blood serum.The important results could be summarized as follows:1. Flander rabbits breed were non-significantly higher than Rex ones for most litter traits studied.2. Years and season of kindling significantly (P≤0.05, 0.01 or 0.001) affected all litter traits at the different ages studied.3. In general, all litter traits studied increased as parity advanced till the third parity then decreased.4. Pre-weaning mortality from birth to 21 days and from birth to 35 days (weaning) were significantly (P≤0.05) affected by year and season of kindling only.5. Most doe reproductive traits were significantly (P≤0.05, 0.01 or 0.001) affected by breed-type, year, season of kindling and parity- order.6. Post-weaning live body weight and weight gain were significantly (P≤0.05, 0.01 or 0.001) affected by breed-type, year and season of kindling, parity- order and sex at most of ages studied.7. SDS-PAGE patterns showed 13 bands were appeared with molecular weights ranging from 24.024 to 181.334 KDa. Most bands were appeared in all lanes with two breeds studied. However, the 68.092 KDa band was detected in the lanes for Rex and did not appear in all lanes with Flander ones.8. Its not recommended Esterase isozyme as biochemical marker in the present material.
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