Characterization of Turbellarian Chromosomes. II. C-Banding in Dugesia lugubris (Tricladida: Paludicola)

C-bands were observed in all chromosomes constituting the diploid complement of the freshwater triclad Dugesia lugubris. C-bands were limited to the centromeric regions and thus differ from those of the closely related species Dugesia polychroa. The two species appear to have had quite different mec...

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Bibliographic Details
Published in:Transactions of the American Microscopical Society 1989-07, Vol.108 (3), p.304-308
Main Authors: Galleni, L., Canovai, R., Esposito, A., Stanyon, R.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological taxonomies
Chromosomes
DNA
Evolution
Fresh water
Fundamental and applied biological sciences. Psychology
Genomes
Invertebrates
Morphology. Histology. Cytology
Nemathelminthia. Plathelmintha
Polyploidy
Sodium
Speciation
Zoology
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Summary:C-bands were observed in all chromosomes constituting the diploid complement of the freshwater triclad Dugesia lugubris. C-bands were limited to the centromeric regions and thus differ from those of the closely related species Dugesia polychroa. The two species appear to have had quite different mechanisms of genome evolution in spite of their supposed close taxonomic relationship. Differences between their karyotypes cannot be explained by simple chromosome rearrangements.
ISSN:0003-0023
2325-5145
DOI:10.2307/3226347