An inherited limb abnormality called syndrome of arachnomelia and arthrogryposis (SAA) has been observed in the Swiss Braunvieh population. A method is presented which allows detection of SAA carrier bulls by mean of superovulation of known carrier cows, embryo transfer and examination of fetuses at about 100 days of gestation. A description of the deformity is given. The primary cause of the defect is attributed to an inherited neuromuscular dysfunction early in gestation. The segregation ratio confirms the hypothesis that this neuromuscular disorder is transmitted as an autosomal recessive trait with high penetrance. The use of this method in an AI program is outlined.

J. Chavas, H. Konig, C. Gaillard, F. Hunziker, M. Schneeberger, A. Tontis

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume IX. Breeding programs for dairy and beef cattle, water buffalo, sheep, and goats., , 185–190, 1986
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