ESTIMATION OF GENETIC PARAMETERS OF CONCEPTION RATE, LAMBS BORN AND LAMBS WEANED OF RAHMANI EWES IN EGYPT USING GIBBS SAMPLING | ||||
| Journal of Animal and Poultry Production | ||||
| Article 12, Volume 27, Issue 7, July 2002, Page 4565-4570 PDF (684.23 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2002.255888 | ||||
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| Authors | ||||
| Manal M. A. Elsayed,1; Mona A. A. osman2; E. F. Mousa3 | ||||
| 1Department of Animal Production, Faculty of Agriculture, Aln Shams University, Shubra AI·Khalma, Cairo, Egypt. | ||||
| 2Anlmal Production Research Institute, Ministry of Agriculture, Dokkl, Giza, Egypt. | ||||
| 3Anlmal Production Dept., Faculty of Agriculture, Asslut University, Asslut, Egypt. | ||||
| Abstract | ||||
| The objective of this study was to estimate the genetic parameters of three important categorical traits in sheep using GIBBS SAMPLING (GS) program. These traits were conception rate (CR). number of lambs bom (NLB) and number of lambs weaned (NLW) of Rahmani ewes in Egypt. Data consisted of 1437 Rahmani ewes raised at two farms. Mehallet-Mousa (mid delta) and EI·Serw (North Delta). belong to the Animal Production Research Institute (APRI) Ministry of Agriculture. The model included the effects of location. year of lambing. season and parity as fixed effects and the effects of the additive genetic and permanent environmental variances as random effects. The heritability estimates for CR, LB and LW were 0.01. 0.02 and 0.02 as a result of GS program. respectively. Genetic correlations were 0.93. 0.76 and 0.79 between CR and NLB . CR and NLW and between NLB and NLW. respectively. | ||||
| Keywords | ||||
| Rahmani. GIBBS SAMPLING. polychotomous traits. conception rate; number of lambs born. number of lambs weaned | ||||
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