HETEROSIS OF SOME ECONOMIC TRAITS IN LOCAL BREEDS OF GOATS, DAMASCUS AND THEIR CROSSES UNDER TWO DIFFERENT REGIONS IN EGYPT | ||
| Journal of Animal and Poultry Production | ||
| Article 2, Volume 29, Issue 8, August 2004, Pages 4429-4433 PDF (1.43 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2004.239406 | ||
| Authors | ||
| M. Eissa,1; M. M. Abdelsalam2; M. H. Hammoud2; Zeinab A. Khalifa1 | ||
| 1Animal Production Research Institute, Ministry of Agric., Dokki, Cairo, Egypt. | ||
| 2Department of Animal Production, Fac. Agriculture, Alex. Univ., Alex., Egypt. | ||
| Abstract | ||
| Data of 532 records of 150 does reared at a Valley farm and 382 does at a Desert farm during the period 1999-2003 were used to estimate the hypothetical and real heterosis of some economic traits under two different regions. In each region, the genotypes were local Baladi or Barki (B), Damascus (D) and DB. The first generation gave greater and heavier litters either at birth or at weaning and yielded more milk than the local breed in both farms. The DB does produce milk with the highest protein and fat percentages. In Valley farm, the DB does milked for longer period than those in the Desert farm and the former does had the longest lactation length (24 weeks). The hypothetical heterosis value was positive in both farms and ranged from + 2.82 to + 23.07 in the Valley farm and ranged from + 0.37 to + 12.72 in the Desert farm. The positive value of real heterosis was found in case of protein and fat percentage in both farms while in Valley farm litter size at weaning and lactation length showed positive real heterosis (+ 16.66 and + 4.34, respectively). Results showed that there was a good prospect of crossbreeding amongst goats to achieve higher milk production for long period which reflected on growth of kids. | ||
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