utosomal Abnormality in a Swine

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  • 豚における常染色体異常例
  • ブタ ニ オケル ジョウセンショクタイ イジョウレイ

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Abstract

This report concerned the autosomal abnormality (Robertsonian translocation) found in an intersexual pig. This intersexual pig was phenotypically normal and had female-like external genitalia with a slightly enlarged clitoris, a vagina, well developed uterine horns, ductus deferences, seminal vesicles, prostates and testes with epididymides. The seminiferous tubules in testicular tissue were underdeveloped and no spermatogenesis was observed (Fig. 1). The chromosome constitution was investigated with leucocytes and cultured cells from the skin and the gonad. The karyotype of this pig was 37, XX. The translocation occurred between a large and a small telocentric chromosome, resulting in a large submetacentric chromosome. It was confirmed with the utilizatin of Giemsa banding technique that this large submetacentric chromosome was formed with centric fusion between Nos. 13 and 17 terocentric chromosomes (Table 1 and Figs. 2, 3).

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