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Increasing of economic efficiency of Shaal sheep with inbreeding control in small flocks | ||
| علوم و فنون دامپروری | ||
| Article 4, Volume 5, Issue 19, September 2016, Pages 33-42 PDF (794.11 K) | ||
| DOI: 10.22092/aasrj.2016.107585 | ||
| Authors | ||
| H. Javaheri* ; H. Sadeghi panah; N. Asadzadeh | ||
| Abstract | ||
| The control of mating and using non- relative rams with proper phenotype can be have a positive effect on weaning lamb crop and so on economic efficiency of flock. For this reason, four yearling rams with a better growth rate, body condition score, body weight and size of fat tail than the others, as well as, have healthy testises and sperm production with good fertility were selected from 80 yearling Shaal ram lambs. 150 ewes were divided randomly into two groups (75 heads); 1- relative group; and 2- non-relative group. The first group (as control) mated with rams from same flock and the second group (non- relative) mated with four selected rams. At lambing, number, gender and birth weight of lambs were recorded. Statistical analysis was performed with SAS software. Ewe reproductive traits and lamb viability of both groups had no significant differences. Body weight of ewe lambs at 4 month to 1.5 years was significantly greater in the relative group than the non-relative group. The results indicated that by using non-relative Shaal rams, the rate of prolificacy improves, that can be improved weaned lamb crop and then flock income and economic efficiency goals can be increased. | ||
| Keywords | ||
| Chaal sheep; Relationship; Growth performance; Reproductive performance | ||
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