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Comparison of MOET in Texel ewe lambs and yearling ewes

Published online by Cambridge University Press:  21 November 2017

B.T. Wolf
Affiliation:
Welsh Agricultural College, Llanbadarn Fawr, Aberystwyth, SY23 3AL
I. McDougall
Affiliation:
Edinburgh Genetics, The Sheep Centre, Malvern, Worcestershire, WR13 6PH
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Extract

Combined multiple ovulation and embryo transfer (MOET) from ewe lambs could significantly increase the rate of genetic progress in sheep improvement programmes (Smith, 1986). The benefits arise from a combination of an increased number of progeny from superior females and a reduction in the generation interval. Maximum success requires that the procedures are carried out in ewe lambs at six to seven months of age to produce offspring when the donors are one year old. Previous studies suggest that embryo quality and survival rates are naturally lower in ewe lambs and are likely to limit the success of MOET in this class of animal (Quirke and Hanrahan, 1977; McMillan and McDonald, 1985). The present study was undertaken to evaluate the potential of recently developed superovulatory procedures for application to ewe lambs.

Type
Sheep Production
Copyright
Copyright © The British Society of Animal Production 1994

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References

McMillan, W.H. and McDonald, M.F. (1985). Animal Reproduction Science 8:235240.CrossRefGoogle Scholar
Quirke, J.P. and Hanrahan, J.P. (1977). J. Reprod. Fert. 51:487489 CrossRefGoogle Scholar
Rangel-Santos, R., McDonald, M.F. and Wickham, G.A. (1991). Proceedings of the New Zealand Society of Animal Production 51:139142.Google Scholar
Smith, C. (1986). Animal Production 42: 8188.CrossRefGoogle Scholar

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