Abstract
Dugesia sanchezi reproduces in nature both sexually and by fission. Laboratory cultures have shown that fissioning is controlled by genetic factors. From sexual specimens randomly mated, 105 sexual and five fissiparous offspring were obtained. The former produced almost exclusively sexual descendents while the latter gave rise to fissiparous individuals, although successively many of them became sexual. These ex-fissiparous specimens show a high fertility and their offspring were almost all fissiparous, with the same characteristics displayed by the preceeding fissiparous generation. Some hypotheses are advanced in order to attempt a genetical interpretation of these results.
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References
Benazzi, M., 1974. Fissioning in planarians from a genetic standpoint. In: Eds., Riser, N. W. amp Morse, M. P., Biology of Turbellaria. New York: McGraw-Hill, pp. 476–492.
Benazzi, M., 1978. Karyological and genetic data on the Hyman, L. H., 1959. On two fresh-water planarians from Chile, planarian Dugesia sanchezi from Chile. Rd. Acc. Lincei, Ser. 8, 64: 299–301.
Benazzi, M. & Benazzi Lentati, G., 1976. Platyhelminthes. In: Ed. John, B., Animal Cytogenetics. Borntraeger, Berlin- Stuttgart, p. 1–182.
Hyman, L. H., 1959. On two fresh-water planarians fromt Chile. Am. Mus. Novit. No. 1932: 1–11.
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© 1981 Dr W. Junk Publishers, The Hague
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Benazzi, M. (1981). Reproductive biology of Dugesia sanchezi, a fresh-water planarian from Chile. In: Schockaert, E.R., Ball, I.R. (eds) The Biology of the Turbellaria. Developments in Hydrobiology, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8668-8_21
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DOI: https://doi.org/10.1007/978-94-009-8668-8_21
Publisher Name: Springer, Dordrecht
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