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Heterochromatic Segments in Vicia revealed by Treatment with HCI–Acetic Acid

• Letter
• Published: 10 February 1968

Nature volume 217, pages 567–568 (1968)Cite this article

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• 13 Citations

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YAMASAKI¹ reported that H segments became visible in the mitotic metaphase chromosomes of Cypripedium debile following treatment with a 1 : 9 mixture of 1 normal HCl and 45 per cent acetic acid or acetic orcein for 15 min at 60° C. Sharma and Roy² and Sen³, using the orcein mixture at 90° C, claimed that the treatment caused chromosome breakage at non-specific sites within a minute. The present experiments on Vicia faba (“Nagasaya Soramame”) studied the effects of these mixtures and the separate effects of 1 normal HCl and 45 per cent acetic acid. Treatments lasting 1–5 or 10 min were given at 60° C and 90° C. Pretreatment with colchicine was necessary to facilitate observation, but fixation in acetic alcohol before treatment was not helpful.

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1. Yamasaki, N., Chromosoma, 7, 620 (1956).

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2. Sharma, A. K., and Roy, M., Chromosoma, 7, 275 (1955).

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3. Sen, S., Nucleus, 8, 63 (1965).

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4. McLeish, J., Heredity (Suppl.), 6, 125 (1953).

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5. Evans, H. J., and Bigger, T. R. L., Genetics, 46, 277 (1961).

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1. Department of Biology, Keio University, Yokohama-Hiyoshi, Japan

   SHIN TAKEHISA

TAKEHISA, S. Heterochromatic Segments in Vicia revealed by Treatment with HCI–Acetic Acid. Nature 217, 567–568 (1968). https://doi.org/10.1038/217567a0

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• Received: 09 October 1967

• Revised: 12 December 1967

• Issue Date: 10 February 1968

• DOI: https://doi.org/10.1038/217567a0

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