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Volume 13, Number 4 >


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Authors: KANAGAWA, Hiroshi Browse this author
KAWATA, Keiichiro Browse this author
ISHIKAWA, Tsune Browse this author
MURAMOTO, Jun-ichi Browse this author
ONO, Hitoshi Browse this author
Issue Date: Dec-1965
Publisher: The Graduate School of Veterinary Medicine
Journal Title: Japanese Journal of Veterinary Research
Volume: 13
Issue: 4
Start Page: 121
End Page: 126
Abstract: The chromosome constitution of a set of bovine heterosexual triplets consisting of two freemartins and one male was studied by means of blood culture, colchicine treatment of bone marrow cells and tissue cultures from several organs. As controls, four multiparous cows, including one female from another heterosexual triplets origin and a set of homosexual triple females, were also studied chromosomally using the blood culture technique. The sexual organs of the freemartins were examined macroscopically and histologically. The results are summarized as follows : 1) Cultured leukocytes and bone marrow cells in both freemartins and the co-tripled male manifested 2A-XX/2A-XY chimerism. The chimera ratios were parallel with each other among these three individuals. Tissue cultures from thyroid, kidneys, lung, gonads and seminal vesicle-like structures of these animals failed to show chimerism. No chimerism was observed, on the other hand, in leukocyte cultures from the control animals. Thus, freemartins involved in heterosexual triplets can also be diagnosed chromosomally as well as in the case of twins. 2) Two freemartins submitted to this study considerably differed in the morphological characteristics of the sexual organs, despite having similar characters in sex-chromosome chimerism.
Type: bulletin (article)
Appears in Collections:Japanese Journal of Veterinary Research > Volume 13, Number 4

Submitter: 獣医学部図書室

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