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A case of azoospermia in a bull carrying a Y-autosome reciprocal translocation
L Iannuzzi1, L Molteni, G P Di Meo
1National Research Council (CNR), IABBAM, Laboratory of Animal Cytogenetics and Gene Mapping, Naples, Italy. L.Iannuzzi@iabbam.na.cnr.it
Abstract:
During normal cytogenetic investigations on the Chianina cattle (BTA) breed, a normal looking young bull was found to carry an abnormal Y chromosome which was a product of a reciprocal translocation between chromosomes Y and 9. This was revealed by both CBA- and RBG-banding techniques and was clearly confirmed by FISH-mapping analysis with IDVGA50 (which paints the complete Yq arm in a normal Y), as well as with AMD1, CGA, IGF2R (mapping to BTA9q16, BTA9q22 and BTA9q27-->q28, respectively) and SRY (mapping to normal BTAYq23). Analysis on sperm from four different samples revealed azoospermia in the carrier, indicating that the rcp(Y;9) induces sterility in the bull.
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