Fertilisation of sheep ova following their transfer to goats

Abstract

AN interesting feature which has emerged from attempts to hybridise domestic sheep (Ovis aries) and goats (Capra hircus) is the marked difference in conception rate according to the direction in which the cross is made. In goats inseminated with sheep semen the conception rate is similar to that in goats mated naturally with male goats; whereas in sheep inseminated with goat semen fertilisation is an infrequent occurrence1–3. The low fertilisation rate in sheep inseminated with goat semen has been confirmed by Hancock4 who found that only 5 of 93 (5.4%) sheep eggs were fertilised by goat spermatozoa.

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References

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    Warwick, B. L., and Berry, R. O., J. Hered., 40, 297 (1949).

  2. 2

    Lopyrin, A. I., and Loginova, N. V., Usp. sovrem. Biol., 36 (1953).

  3. 3

    Lopyrin, A. I., and Loginova, N. V., Anim. breed. Abstr., 22, No. 1019 (1954).

  4. 4

    Hancock, J. L., Proc. 5th int. Cong. anim. Reprod., A. I. Trento, 3, 445 (1964).

  5. 5

    Hancock, J. L., and Hovell, G. J. R., J. Reprod. Fert., 2, 295 (1961).

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MCGOVERN, P. Fertilisation of sheep ova following their transfer to goats. Nature 250, 83 (1974). https://doi.org/10.1038/250083a0

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