Genetic and morphological studies on the right gonad of ovariectomized chickens.

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  • KAGAMI Hiroshi
    Laboratory of Animal Genetics, Faculty of Agriculture, Nagoya University
  • TOMITA Takeshi
    Laboratory of Animal Genetics, Faculty of Agriculture, Nagoya University

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  • 卵巣除去鶏における右生殖腺の遺伝学的および形態学的研究
  • 卵巣除去鶏における右生殖腺の遺伝学的および形態学的研究〔英文〕
  • ランソウ ジョキョ ニワトリ ニ オケル ミギセイショクセン ノ イデンガクテキ

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Abstract

The present study was conducted to cause sex-reversal in chickens whose genetic sex has been confirmed by the modern karyotyping techniques. The sex-reversed chickens induced by ovariectomy, were classified into three categories on the basis of secondary sex characteristics. Two chickens were classified as High degree of masculinity, eleven as Middle degree and fourteen as Low degree of masculinity. When the left ovary was removed, the right gonad began to develop. Though there was gonadal variation in structure, they were also classified into three categories; two classified as testicular gonad, thirteen as ovo-testis and twelve as ovary-like gonad. The degree of masculinity as determined from the secondary sex characteristics, especially comb growth which was almost commensurate with the masculinization of the right gonad.

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