El-Saidy,, B., Salama, O., Ashmawy, T., Gabr, M. (2006). REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS. Journal of Animal and Poultry Production, 31(4), 1981-1992. doi: 10.21608/jappmu.2006.235467
B. E. El-Saidy,; O. A. Salama; T. A. Ashmawy; M. G. Gabr. "REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS". Journal of Animal and Poultry Production, 31, 4, 2006, 1981-1992. doi: 10.21608/jappmu.2006.235467
El-Saidy,, B., Salama, O., Ashmawy, T., Gabr, M. (2006). 'REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS', Journal of Animal and Poultry Production, 31(4), pp. 1981-1992. doi: 10.21608/jappmu.2006.235467
El-Saidy,, B., Salama, O., Ashmawy, T., Gabr, M. REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS. Journal of Animal and Poultry Production, 2006; 31(4): 1981-1992. doi: 10.21608/jappmu.2006.235467
REPRODUCTIVE PERFORMANCE OF DAMASCUS AND DAMASCUS X BALADI CROSSBRED DOE KIDS
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.
View on SCiNiTO
Top