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

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/secb/032/05/0227-0230

    • Keywords

       

      Chromosome Count; Somatic Chromosome; Panicle Length; Chromosome Type; Panicle Number

    • Abstract

       

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

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

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

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

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

      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.

    • Author Affiliations

       

      J G Oke1

      1. Botany Section, College of Agriculture, Poona
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