REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS | ||||
| Journal of Animal and Poultry Production | ||||
| Article 7, Volume 31, Issue 4, April 2006, Page 1981-1992 PDF (1.83 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2006.235467 | ||||
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| Authors | ||||
| B. E. El-Saidy,; O. A. Salama; T. A. Ashmawy; M. G. Gabr | ||||
| Animal Production Research Institute, Agricultural Research Center. | ||||
| Abstract | ||||
| The experimental work was carried out at Sakha Animal Production Research Station, Animal Production Research Institute, throughout Mosuccessive breeding seasons, to investigate the growth and reproductive performance of Damascus and Damascus x Baladi crossbred doe kids. A total of 45 weaned doe kids were available for this study; 18 Damascus (D), 9 (3!4D.1!4B) and 18 (1!4D.3!4B) weighing 13.22, 11.01 and 11.23 kg, respectively. All doe kids were born in March and April and were kept under the same management and feeding conditions over the whole experimental period. Animals were weighed monthly until 18 months of age and at occurrence of the 1'" oestrus. Starting, from four months of age (July and August) doe kids were observed daily for estrous activity and blood samples were taken twice weekly until incrdence of the 15t oestrus. The experimental animals were allowed for mating at the onset of 1"’1 estrus. Laparoscopic examination was conducted on 5 doe kids in each group 7~12 days after incidence of the 1" estrus and number of CL presented on right and left _ ovaries were counted. At all ages, Damascus kids showed significantly (P<D.UE) higher body weights than in the 314D and 114D groups- Percentage of animals attained puberty at 1"" breeding season was 33% of the total number of D doe kids and 56% of that in each of 3140 and 1I4D groups. The rest of the animals of each group delayed to the following season. Damascus doe kids came in estrus considerably later, older and heavier than those of the two crossbred groups. The 15t estrus has been preceded by one or more progesterone spike(s) and (in most cases) ovulation. Ovulation rate was 1.0, 1.75 and 1.88 in D, 314D, 114D doe kids, respectively. With no marked breed group differences, animals bred in the 15t breeding season had markedly low conception rates, high incidence of abortion and still birth cases and low rates of fertility. Better conception rates were obtained on second breeding season at which animal attained sexual maturity. | ||||
| Keywords | ||||
| Doe kids; Damascus; crossbred; reproduction | ||||
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