GENETIC AND NON-GENETIC FACTORS AFFECTING WEANING AND POST-WEANING GROWTH TRAITS IN BAUSCAT AND BALADI RED RABBITS AND THEIR CROSSES. | ||
| Journal of Animal and Poultry Production | ||
| Article 5, Volume 31, Issue 11, November 2006, Pages 6957-6969 PDF (3.89 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2006.235654 | ||
| Authors | ||
| A. M. Farid,1; G. E.Y. Attaiah2; M. G. Gharibz2 | ||
| 1Anim. Prod. Res. Institute, Ministry of Agric., Dokki, Cairo, Egypt. | ||
| 2Dept. of Anim. Prod., Fac. of Agric., AI-Azhar Univ., Nasr City, Egypt. | ||
| Abstract | ||
| A total of 823 weaned rabbits of Bauscat (B) and 561 of Baladi Red (BR) were used to evaluate genetically their weaning and post-weaning growth performance Weaning weight at four weeks, post-weaning body weights (BW) at 6, 8, 10, 12 and 14 weeks of age and weight gains (DG) at the intervals of 4-6, 6-8, 8—10,10-12. 12-14 and 4-14 weeks were studied. Means of body weight for Bauscat rabbits were to some extent superior to Baladi Red for some growth traits. In general CV Percentages of BW and DG traits decreased with advance of age Year of birth effect was significant (P 50.05, P $0.010r P $0.001) on BW at 4, 10, 12 and 14 weeks of age in B rabbits and at 4 and 8 weeks of age in BR ones. Year of birth effect on DG was significant (P5005, PS0.01or P50 001) during the intervals of (6-8) and (4-14) weeks of age in B rabbits, while during the intervals (4-6) weeks in BR rabbits Season of birth had a significant (P 50.01or P SO 001)) effect on BW at 12 and 14weeks of age in B rabbits, and at 4 and 12 weeks of age in BR rabbits. Season of birth was significant (P 50.05, P 50.01or P 50.001) effect on 06 during the intervals (4-6), (10-12), (12-14) and (444) weeks in B rabbits. Body weights of rabbits was found to differ significantly (P 50.05, P 50.010r P $0001) with parity effect at 4, 6, and 12 weeks of age in B rabbits and (P $0001) at 4 weeks of age in BR rabbits Differences in average DG due to parity effect were Significant (P $0.05 or P 50 001) during the age intervals of (4-6) weeks of age in B rabbits and (6-8) weeks in BR Sex effects on BW and DG of the two studied breeds were slight and not significant at all ages studied. Litter Size at birth had a significant effect (P SO 05 or P $0001) at all ages in B rabbits and at 4, 6, 8 and 14 weeks of age in BR rabbits. Litter size at birth effects on DG were also significant (P £0.05, P 50 Otor P $0.001) during the gain- intervals of (10-12) and (4-14) weeks in B rabbits and those interval of 6-8, 8-10 and 10-12 weeks in BR rabbits. Effects of breed group were non-significant on BW and DG except that for D6 during interval of 810 weeks of age which was significant (P $0.05). Sire effect was Significant (P £0.05, P $0.01or P $0001) on BW and DG at different ages for both breeds. except BW at 14 weeks of age in B rabbits, while at 10 and 12 weeks of age in BR rabbits. For DG Sire effects were significant (P 50.05, P $0,01or P 50 001) during the age intervals of (6-8) and (8-10) weeks in B rabbits, and those of (6-8), (8-10), (10-12), (12-14) and (444) weeks intervals in BR rabbits Variance components due to Slf'e effect were found to be higher for most traits studied in BR than in B rabbits. Estimates of heritability using Henderson ||| method for BW and D6 in BR rabbits are in general, substantially higher Man in Bauscat rabbits. | ||
| Keywords | ||
| Rabbits; body weight; post-weaning growth; sire; variance component; heritability | ||
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