CROSSBREEDING OF ZARAIBI AND BARKI DOES, REPRODUCTIVE PERFORMANCE GROWTH AND ADAPTABILITY OF F1 KIDS | ||
| Journal of Animal and Poultry Production | ||
| Article 2, Volume 29, Issue 2, February 2004, Pages 571-584 PDF (2.07 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2004.239000 | ||
| Author | ||
| M. M. A. EI-Sherif, | ||
| Animal and Poultry Physiology Department, Desert Research Center, Mataria, Cairo, Egypt. | ||
| Abstract | ||
| The present work was a part of a project entitled (Introducing the High Milk Yieldi"g Zaraibi Goats Into the Newly Reclaimed Areas). The objective was to Improve goat milk producuon under the prevailin~ harsh conditions of the Egyptian des2!'\ ~ lUI aibi goats is fl breed recognized for hugh milk production and high reproductive performance. The plan of the project was designed to propagate the Zaraibi breed erthc, as a pure breed or through crossbreeding with the Barki breed. tne native breec of the Egyptian northwestern coat-tal desert. This work was carried out at Maryo'Jt Resaarch Station. southwest of Alexa ldria, using 25 Sarki does mated by Barki bucks for the production of Barki kids I BB) and 27 Barki does mated by Zaraibi bucks for tile production of F1 kids (BZ). Another flock of pure Zaraibi does was also mated by the Zaraibi bucks for the propagalion of pure Zaraibi (ZZ). Barki does mated to Zaraibi bucks showed 3 high percentage of twin births (29.6%) compared to those mated to Barki bucks (12.0%). Average litter size was 1.38 for the BZ group while it was only 1.07 for Sq. In addition, the BZ group gave higher body weight kids born/doe bred (1.63 kg) than that of BB (1.41 kg). The results of the present study indicated the t there was a clear advantage of ZZ kids body weight over that of BB and BZ kids, especially at the beginning of the 4th week after birth (4.33.2.64 and 2.53 kg, respective y) and at 12 weeks of age (7.75, 5.70, and 4.64 kg, respectively). The overall mean of the afternoon rectal ter iperature of BB kids was higher (P<0.05) compared to BZ kids (40.07 vs. 39.93 cCl. lhe BZ kids had higher (P<O 05) avera I! rnorninq coat temperature (33.47 vs. : 3.11 °C) but a lower (P<0.05) temperature gradient from skin to the tip of the cos-t than those of BB kids (2.15 vs. 2.50 °C) These re~ected a better insulation ability of the hair coat in BB kids. However, there were no differences in morning and sfternoon skin temperatures and respiration rates. These results reflected the ability of BZ kids to control their body temperature under the harsh conditions of the nothwestern coastal desert. The results of the present work demonstrated the capability of raising the Zaraibi breed in this area. | ||
| Keywords | ||
| Zaraibi and Barki goats; crossbreedlnc. reproductive performance; F1 kids; body weight; thermoregulation | ||
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