Skip to main content

Morphology of pachytene chromosomes and its bearing on the nature of polyploidy in the cytological races of Apluda mutica L.


Pachytene chromosomes of diploid (n=10), hexaploid (n=30) and heptaploid (n=35) races of Apluda mutica L. are similar in their diagnostic morphological features. Hexaploids and heptaploids possess the same ten basic types of chromosomes characteristic of the diploid in multiples of six and seven respectively. Quadrivalent associations involving four homologous chromosomes were observed for all ten types of chromosomes of the hexaploid and heptaploid. It is suggested that the polyploid races may be autoploids.

This is a preview of subscription content, access via your institution.


  • Avdulov, N. P. (1928). Systematic karyology of the family Gramineae. Proc. all-Russ. Bot. Congr. 65–67.

  • Hunter A. W. S. (1934). A karyosystematic investigation in the Gramineae. Can. J. Res. (C) 11: 213–241.

    Google Scholar 

  • McClintock B. (1929). Chromosome morphology in Zea mays. Science. 69: 629–630.

    Google Scholar 

  • Murty U. R. (1965). Chromosome numbers in the Gramineae. Chrom. Inf. Serv., Tokyo 6: 9.

    Google Scholar 

  • Murty, U. R. (1968). Cytogenetic studies in Apluda mutica L. and Iseilema laxum Hack. Thesis, Andhra Univ., Waltair, India.

  • Ourecky D. K. (1963). Pachytene chromosome morphology in Cynodon dactylon (L.) Pers. Nucleus 6: 63–82.

    Google Scholar 

  • Roy R. P. & D. N. Singh (1958). Pachytene studies in Mnesithea perforata (L.). Caryologia 11: 34–41.

    Google Scholar 

  • Roy R. P., D. N. Singh & S. Kumari (1965). Pachytene analysis in Dichantium. I. Chromosome morphology in D. annulatum. Nucleus 8: 137–148.

    Google Scholar 

  • Venkateswarlu, J. (1962). Some aspects of the study of pachytene chromosomes. Presidential address. Section of Botany. 49th Indian Science Congress, Cuttack, India.

  • Venkateswarlu J. & V. R. K. Reddy (1956). Morphology of the pachytene chromosomes and meiosis in Sorghum subglabrescens, a Eu-Sorghum. J. Indian bot. Soc. 35: 344–356.

    Google Scholar 

Download references

Author information

Authors and Affiliations


Additional information

This work forms part of a thesis submitted to the Andhra University, Waltair for the Degree of Doctor of Philosophy.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Murty, U.R. Morphology of pachytene chromosomes and its bearing on the nature of polyploidy in the cytological races of Apluda mutica L.. Genetica 44, 234–243 (1973).

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI:


  • Morphological Feature
  • Basic Type
  • Homologous Chromosome
  • Pachytene Chromosome
  • Quadrivalent Association