EFFECT OF GENETIC AND PHYNOTYPIC FACTORS ON KIDDING INTERVAL OF INDIGENOUS AND EXOTIC BREEDS OF GOATS AND THEIR CROSSES IN EGYPT | ||
| Journal of Animal and Poultry Production | ||
| Article 10, Volume 27, Issue 12, December 2002, Pages 8225-8231 PDF (546.36 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2002.257650 | ||
| Authors | ||
| M. M. Abdelsalam,1; M. Eissa2; A. I. Heider2 | ||
| 1Animal Production Department, Faculty of Agric., Alexandria Univ. | ||
| 2Animal Production Research Institute, Ministry of Agriculture. | ||
| Abstract | ||
| This study was carried out on 604 record of Damascus (D), Anglo-Nubian (N), Zaraibi (Z) Baladi (B), and Angora (A) does and their first crosses with B and up grading with the improved breed, over 17 years (1985 – 2001) at the Farm of Faculty of Agriculture, Alexandria University. Kidding interval was significantly affected by genotype, age at first mating, weight of dam at previous kidding, days in milk and year of kidding. The B and Z breeds had the shortest interval among purebreds and the N had the longest interval. Kidding. Kidding interval was better in the triple-bred goats (Z.ZB and A.AB) than in the half-bred (ZB and AB), while the up grading with D or N breeds resulted in increasing kidding interval. The kidding Interval increased with the advance of age till the third or the fourth year of age and then decreased till six-year old with no significant effect. Does that mated for the first time at one year of age have the shortest kidding interval. Does weighed more than 35 kg had the longest kidding interval. Does dried during the first 4-8 weeks of lactation had shorter kidding interval than those stay in milk throughout the lactation. The results recommended that does must be mated at 1 – 1.5 years of age and weighed 23-28 kgs and good management should be taken to reduce the kidding interval. | ||
| Keywords | ||
| Goats- kidding interval- genetics; phenotypics | ||
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