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.
Literatur
Benazzi, M., and Benazzi Lentati, G., in: Animal Cytogenetics. Ed. B. John. Borntraeger, Berlin-Stuttgart 1976.
Benazzi, M., in: Mechanisms of Speciation, p. 307. Alan R. Liss Inc., New York 1982.
Rees, H., and Jones, R.N., Int. Rev. Cytol.32 (1972) 53.
Manfedi Romanini, M.G., in: Cytotaxonomy and Vertebrate Evolution. Eds B. Chiarelli and E. Capanna. Academic Press, London-New York 1973.
Manfredi Romanini, M.G., Mammalia, in press (1985).
Hinegardner, R., in: Molecular Evolution. Ed. F. Ayala. Sinauer Associates Inc., Sunderland, Massachusetts 1976.
Benazzi, M., Formenti, D., Manfredi Romanini, M.G., Pellicciari, C., and Redi, C.A., Caryologia34 (1981) 129.
Benazzi, M., and Puccinelli, I., Chromosoma40 (1973) 193.
Chiarelli, B., Caryologia33 (1968) 1.
Benazzi, M., Caryologia10 (1957) 276.
Benazzi, M., Bagunà, J., Ballester, R., Puccinelli, I., and Del Papa, R., Boll. Zool.42 (1975) 81.
Benazzi, M., Quad. Acc. naz. Lincei,47 (1960) 273.
Redi, C.A., Garagna, S., and Pellicciari, C., Stain Technol57 (1982) 190.
Bernocchi, G., De Stefano, G.F., Porcelli, F., Redi, C.A., and Manfredi Romanini, M.G., Nucleus19 (1976) 141
Bedi, K.S., and Goldstein, D.J., J. Cell Biol.71 (1976) 68.
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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