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Using Suffolk sheep for improving lamb production from sub-tropical Egyptian sheep:2. Lamb and fattening performance

Published online by Cambridge University Press:  27 March 2009

A. S. El-Shobokshy  and
A. M. Aboul-Naga
A. S. El-Shobokshy
Affiliation:
Animal Production Research Institute, Ministry of Agriculture, Dokki, Cairo, Egypt
A. M. Aboul-Naga
Affiliation:
Animal Production Research Institute, Ministry of Agriculture, Dokki, Cairo, Egypt
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Summary

Lamb and fattening performance and carcass quality of Suffolk x local Ossimi cross-bred lambs are discussed. 1369 cross-bred lamb records over the period from 1957 to 1970 were available for the study. The lambs of 50–59% Suffolk were the best cross-bred group with an advantage of 7–7, 14–2 and 17–1% over the native Ossimi lambs in birth weight, 120-day and yearling body weights, respectively. Generally, lamb performance declined as the Suffolk breeding was increased. However, breed groups variation was not statistically significant, except for birth weight.

Seventy-one weaned male lambs, 4 months of age, from three breed groups: 70–90% Suffolk, 35–45% Suffolk and local Ossimi, were fattened for 16 weeks using two levels of feeding. The two Suffolk cross-bred groups gained slightly more body weight than the local Ossimi. After 8 weeks of fattening, the 35–45% Suffolk lambs gained significantly more weight than the local lambs. However, the local lambs were more efficient in converting food to live-weight gain.

The carcass quality of the Suffolk cross-bred lambs was better than the local lambs, and the advantage was greater for the high Suffolk breeding group.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 90 , Issue 1 , February 1978 , pp. 131 - 137
Copyright
Copyright © Cambridge University Press 1978

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References

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