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Journal of Genetics

, Volume 21, Issue 1, pp 57–69 | Cite as

The inheritance of a lethal muscle contracture in the sheep

  • J. A. Fraser Roberts
Article

Summary

  1. 1.

    A lethal deformity of new-born lambs is described. The most striking feature of the condition is that the lambs are born with some or all of the limbs rigidly fixed, with only a small degree of movement possible at the joints. Parturition is rendered very difficult and there is a considerable mortality amongst the ewes producing these lambs.

     
  2. 2.

    The condition depends upon the homozygous state of an autosomal recessive factor.

     
  3. 3.

    During two years the sex-ratio of the affected lambs born in the flock observed was abnormal. Subsequent results and in particular anad hoc experiment gave a normal sex-ratio. Whether there is an additional complication that can lead to a disturbed sex-ratio must be left an open question.

     
  4. 4.

    The incidence of the defect is discussed and a brief account is given of the history of its appearance in the particular flock observed.

     

Keywords

Newborn Lamb Distal Articular Surface Recessive Factor Systen Commercial Flock 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Reference

  1. 1.
    Roberts, J. A. Fraser, “A Hereditary Lethal Deformity in Newborn Lambs.” Journ. Min. Agric. vol. XXXIII, pp. 795–801, 1926.Google Scholar

References

  1. 1.
    Bouley, quoted by Craig,Fleming’s Veterinary Obstetrics, 3rd edition, 1912.Google Scholar
  2. 2.
    Rainhard, quoted by Craig,Ibid. Google Scholar

Reference

  1. 2.
    Jones, D. E. and Mason, S. L., “Inheritance of Congenital Cataract,” Amer. Nat. vol. L, p. 119; 751, 1916.CrossRefGoogle Scholar

Reference

  1. 1.
    Crew, F. A. E. “The Significance of an Achondroplasia-like Condition met with in Cattle,”Proc. Roy. Soc. B, vol. XCV, pp. 228–255, 1923.CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1929

Authors and Affiliations

  • J. A. Fraser Roberts
    • 1
  1. 1.British Research Association for the Woollen and Worsted IndustriesLeeds

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