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Feulgen-DNA amounts and karyotype lengths of three planarian species of the genusDugesia

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Summary

Genome sizes of the planariansD. lugubris (2n=8),D. polychroa (2n=8) andD. benazzii (2n=16) were evaluated on metaphase plates by measuring both the Feulgen-DNA contents and the karyotype lengths. In the three species, genome sizes are significantly different; this finding rules out the possibility of a karyotype evolution through simple chromosome rearrangements betweenD. lugubris andD. polychroa. A different Feulgen-DNA content per unit length of karyotype in the three species studied was also found, which suggests that DNA could be differently packed along metaphase chromosomes.

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Authors and Affiliations

  1. Dipartimento di Biologia Animale, Centro di Studio per l'Istochimica del C.N.R., Università degli Studi di Pavia, Piazza Botta 10, I-27100, Pavia, Italy

    C. Pellicciari, S. Garagna, D. Formenti, C. A. Redi & M. G. Manfredi Romanini

  2. Istituto di Zoologia e Anatomia Comparata, Università degli Studi di Pisa, Via Volta 4, I-56100, Pisa, Italy

    M. Benazzi

Authors
  1. C. Pellicciari
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  2. S. Garagna
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  3. D. Formenti
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  4. C. A. Redi
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  5. M. G. Manfredi Romanini
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  6. M. Benazzi
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Pellicciari, C., Garagna, S., Formenti, D. et al. Feulgen-DNA amounts and karyotype lengths of three planarian species of the genusDugesia. Experientia 42, 75–77 (1986). https://doi.org/10.1007/BF01975903

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  • DOI: https://doi.org/10.1007/BF01975903

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