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English :
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Study on the productive and reproductive performance of desert Baraki goats and their crosses with Damascus and Zaraibi goats.
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Arabic :
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دراسة الأداء الإنتاجي و التناسلي للماعز البرقي الصحراوية و خلطانها مع الماعز الدمشقي و الزرايبي.
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| Abstract |
1.The study was carried out on 1020 records of Barki zaraibi, Damascus goat flocks and their crossbreds that were reared at Bourg EI-Arab Experimental Farm, Ministry of agriculture, Egypt tostudy their productive and reproductive performance 2. Fertility as conception rate, was the highest in Barki (B) does followed by the Damascus (D) does and then by the zaraibi does(Z).The 1/2 D. 1/2 B does were higher than all purebred while, 1/4 D. 3/4 B does were higher than D and Zdoes. The 1/2 z. ½ B does were the lowest CR among all genotype groups.
3. The Zaraibi does were more fertile (as kids born or weaned per doe joined) and more prolific (as kids born or weaned per doe kidded) than the Barki does or the Damascus does.
4. The crossbred 1/2 D. 1/2 B. and 1/4 Z. 3/4 B, were higher fertility (as kids born or weaned per doe joined) than purebreds and exceeded those 1/4 D. 3/4 B and 1/2 Z. 1/2 B does.
5. The Damascus does were the highest in both fertility (as Kg born or weaned per doe joined) or prolificacy (as kg born or weaned per doe kidded than the Barki does and followed by the zaraibi does.
The ½ D.½ B does were higher in the same measures than their purebreds.
6. The crossbred 1/2 Z, 1/2 B does gave higher Kgs born per doe joined than the Barki does and gave lower kgs weaned per doe joined than did all genotype groups except those of Zaraibi does.
7. The 1/2 Z. 1/2 B does were more prolific (Kg born per doe kidded) than purebreds, but higher than Zaraibi does and lower than Barki does in Kgs weaned per doe kidded.
8. The 1/4 Z. 3/4 B does were higher than the Barki does in kgs born per doe joined and lower than the Barki and Damascus does in Kgs weaned per doe joined.
The same crossbred were poorer than the Zaraibi or Barki does in Kgs born per doe-kidded and higher than Z or B in Kgs weaned per doe kidded.
9. Fertility is improved with advancing parity up to the maximum at the 4th parity (in all different measurements).
10. Prolificacy increased with increasing parity up to 3rd parity except in the case of kids born per doe kidded (6th,parity).
11. Highly significant effect was shown due to breed on CR,KBj&Kwjthat due to yearon Kg Bj& Kg Wj, that due to parity onKBj.
12. Breed, year and parity had highly significant effect on prolificacy (as KBk, KgBk and KgWk). Year and parity had a ignificant effect on KWk. -13. the Damascus kids were the heaviest body weights and pre and post weaning growth than the local breeds.
14. The crossbred ½ D.12 B and 1/2z.1/2B kids were heavier inbirth weight than those of . B,Z 1/4 D, 3/4D,3/4B and 1/4Z.3/4B kids.
15. The 1/2 D . 1/2 B kids were higher than 1/2 Z. 1/2 B kids by 12% in weaning weight.
16. The crossbred kids resulted from cross B with D showed higher weights at marketing than the crossbred kids resulted from cross B with Z goats.
17. Male kids exceeds female kids by about 10%, 13.4% and 18% in body weights at birth, weaning and marketing, respectively.
18. Twin kids were lighter than single kids but heavier than triplets in their body weights at all stages studied.
19. Birth weight increased with increasing parity up to 6th parity. The trend of declining weaning and marketing weights was found at the 5th and the 4th parity, respectively.
20. The difference in weights of kids to breed, type of birth and year were highly significant.
21.Parity had highly significant effect on birth weight significant effect on weaning weight, and it has non significant effect on marketing weight.
22. Sex of kids, also had a different effect on body weight. The effect was nonsignificant (at birth) , significant (at weaning) and highly significant (at marketing).
23. The all crossbred kids were better than those of B and Z kids in pre and post-weaning daily gain (with the exception of ½ Z. ½ B kids was equal with the B kids in post weaning growth )
24. The ½ D. ½ B gave 21% and 30% and the ¼ D. ¾ B gave 22% and 21% more in daily gain pre weaning and post weaning than the B kids.
25. The growth of D and their crosses with B were higher than that of Z and B or their crosses.
26. The differences between single kids and twin kids were 6 gram in
preweaning growth and increased to 23 gram in post- weaning growth.
27. Pre-and post weaning growth of male kids were better than female kids.
28. Breed, year had highly significant effect on growth at the two period.
Parity had highly significant effect on pre- weaning growth.
29. Sex of kid had non significant and significant effect on pre weaning and post weaning growth, respectively. But the type of birth fluctuate the trend.
30. Mortality rate from birth up to weaning among Damascus purebred kids were 11.0% more than the B kids, while the Z kids were only 6.9% more than the B kids.
31. ¼ D. ¾ B crossbred kids performed generally much better in pre weaning mortality 24.61%, while preweaning losses of B, D and Z pure
kids were 24.13, 35.11 and 31.03%, respectively also mortality of ½ D. ½ B ½ z. ½ B and ¼ z. ¾ B crossbred kids were 32.70, 21.33 and 34.44% respectively .
32. Incidence death among female kids were lower than that with male kids 27.10% virsus 30,99% and single kids had lower percentages of losses than that with twin kids from birth up to weaning.
33.Among multiple births, the mortality rate tended to be higher for triplets (35.85%) than for twins (27.44%).
34. The highest percentages of losses noticed at 5th parity and oscillated afterward and the lowest percent was found at the first three parity. Mortality rate till weaning significantly varies among years.
35. The results indicate that the use of the Damascus bucks for improving the Barki kids seem to be better than using the zaraibi bucks. It is suggested that more work should be carried out to evaluate the productivity of selected animals from these local purebred types of goat and their crosses when being reared under better managerial and feed conditions.
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| Publication year |
1990
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
350
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| Organization Name |
Sheep and Goat Research Department
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| Country |
Egypt
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| Department |
Sheep and Goat Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal husbandry
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AGROVOC
TERMS |
Breeding stock.
Goats.
Performance testing.
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| Proposed Agrovoc |
animal , zaraibi goat, ;animal , zaraibi goat, ;Damascus goat , ;
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| Publication Type |
Master Thesis
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