Feulgen-DNA content and C-banding of robertsonian transformed karyotypes in dugesia lugubris

M. Benazzi, D. Formenti, M. G Manfredi Romanini, C. Pellicciari, C. A. Redi

Research output: Contribution to journalArticlepeer-review

Abstract

In the planarian species, Dugesia lugubris, two biotypes are found: E (2n = 8, n = 4) and F (2n = 6, n = 3); on the basis of karyometric studies it has been hypothesized that the second was derived from the first through a Robertsonian mechanism of centric fusion. The quantitative cytochemical data reported here confirm the hypothesis of karyotype evolution, since there are no significant differences between the DNA content of the nucleus in the two biotypes. The regenerative blastemas of both biotypes contain a number of cellular populations with a variable Feulgen-DNA content; these correspond to successive doublings of the 2C diploid content. In addition, metaphase plates with multistranded chromosomes have been found. A difference between the chromosome C-banding in the two biotypes has also been observed.

Original languageEnglish
Pages (from-to)129-139
Number of pages11
JournalCaryologia
Volume34
Issue number2
DOIs
Publication statusPublished - Jan 1 1981

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Genetics

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