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Chromosome numbers in some species ofDichanthium Willemet, andBothriochloa O. Ktze

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Proceedings / Indian Academy of Sciences

Summary

  1. 1.

    Cytological examination ofD. annulatum, D. caricosum, D. nodosum andB. intermedia was undertaken.

  2. 2.

    Meiotic and somatic chromosome numbers observed namelyn = 20 and2n = 40 inD. annulatum are in confirmation with the observations of the previous workers.

  3. 3.

    Meiotic and somatic chromosome numbers inD. caricosum have been observed as 20 and 40 respectively for the first time as the somatic number reported by Krishnaswamy (1939) does not agree with the number reported here.

  4. 4.

    The somatic chromosome number inD. nodosum is 2n = 40. This is being reported for the first time.

  5. 5.

    No polyploidy was observed in the forms of the three species ofDichanthium studied.

  6. 6.

    InB. intermedia 40 chromosome type is being reported for the first time and the existence of 60 chromosome type is confirmed.

  7. 7.

    The existence of polyploidy has been observed inB. intermedia and the increase in chromosome number is associated with the increase in size and other characters.

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References

  1. Avdulov, N. P.Bull. Appl. Bot. Genet, etc., Suppl., 1931,43 & 44.

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  5. Krishnaswamy, N. “Untersuchungen zur Cytologie und Systematik der Gramineen,”Beih.Bot. Zbl., 1939,60, 1.

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Authors and Affiliations

  1. Botany Section, College of Agriculture, Poona

    J. G. Oke

Authors
  1. J. G. Oke
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Additional information

Communicated by Professor L. S. S. Kumar,f.a.sc.

The author is greatly indebted to Professor L. S. S. Kumar, for his guidance and encouragement during the course of this work.

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Oke, J.G. Chromosome numbers in some species ofDichanthium Willemet, andBothriochloa O. Ktze. Proc. Indian Acad. Sci. 32, 227–230 (1950). https://doi.org/10.1007/BF03050171

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  • DOI: https://doi.org/10.1007/BF03050171

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