CYTOLOGIA
Online ISSN : 1348-7019
Print ISSN : 0011-4545
Standardized Karyotype and Idiogram of Titan Triggerfish, Balistoides viridescens (Tetraodontiformes, Balistidae) in Thailand
Weerayuth SupiwongAlongklod TanomtongSarun JumrusthanasanSuthip KhakhongLamyai NeeratanaphanLa-Orsri Sanoamuang
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2013 年 78 巻 4 号 p. 345-351

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The standardized karyotype and idiogram of the titan triggerfish, Balistoides viridescens (Bloch & Schneider 1801) from Phuket Province, Thailand, were obtained from the present study. Kidney cell samples were taken from five male and five female fish. The mitotic chromosome preparations were conducted directly from the kidney cells. Conventional staining and Ag-NOR banding techniques were applied to stain the chromosomes. The results indicated that the diploid chromosome number of B. viridescens was 2n=44, and the fundamental number (NF) was 60 in both sexes. The chromosome types consist of 2 large metacentric, 4 large acrocentric, 2 large telocentric, 8 medium acrocentric, 10 medium telocentric, 2 small acrocentric, and 16 small telocentric chromosomes. No strange-sized chromosomes related to sex was observed. The region adjacent to the subtelomeric of short arm of chromosome pair 3 showed clearly observable secondary constriction/NORs. The karyotype formula for B. viridescens is as follows:
2n (diploid) 44=Lm2+La4+Lt2+Ma8+Mt10+Sa2+St16

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© 2013 The Japan Mendel Society
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