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Hybrids between Schistosoma mansoni and S. rodhaini: characterization by cercarial emergence rhythms

Published online by Cambridge University Press:  06 April 2009

A. Thèron
A. Thèron
Affiliation:
Laboratoire de Biologie Animale (UA CNRS 698), Centre de Biologie et d'ecologie tropicale et méditerranéenne, Université, avenue de Villeneuve, 66025 Perpignan Cedex, France
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Summary

Hybridization between Schistosoma mansoni, with a diurnal cercarial emergence rhythm and S. rodhaini, with a nocturnal cercarial shedding pattern leads to F1 and F2 generations, hybrid schistosomes whose chronobiological phenotype of cercariae is characterized by two unequal emergence peaks, one diurnal and the other nocturnal. The relative importance of diurnal and nocturnal peaks depends upon which S. mansoni strain (early or late) is used for the hybridization with S. rodhaini. The results are compared and discussed with those resulting from crosses between intraspecific sympatric and allopatric chronobiological variants (early and late) of S. mansoni. The genetic determinism of the cercarial emergence of schistosomes and the significant differences observed between cercarial shedding patterns of parental species and their hybrids allow the use of this behavioural marker in biological and genetical studies in schistosome populations.

Keywords

Schistosoma mansoniS. rodhainihybridizationcercarial emergencebehavioural marker
Type
Research Article
Information
Parasitology , Volume 99 , Issue 2 , October 1989 , pp. 225 - 228
Copyright
Copyright © Cambridge University Press 1989

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References

Chassè, J. L. & Thèron, A. (1988). An example of circular statistics in chronobiological studies: analysis of polymorphism in the emergence rhythms of Schistosoma mansoni cercariae. Chronobiology International 5, 433–9.Google Scholar
Frandsen, F. (1978). Hybridization between different strains of Schistosoma intercalatum Fisher 1934, from Cameroun and Zaïre. Journal of Helminthology 52, 11–22.CrossRefGoogle ScholarPubMed
Taylor, M. G. (1970). Hybridization experiments on five species of African schistosomes. Journal of Helminthology 44, 253–314.Google Scholar
Thèron, A. (1984). Early and late shedding patterns of Schistosoma mansoni cercariae: Ecological significance in transmission to human and murine hosts. Journal of Parasitology 70, 652–5.CrossRefGoogle ScholarPubMed
Thèron, A. (1985). Polymorphisme du rythme d'émission des cercaires de Schistosoma mansoni et ses relations avec l'écologie de la transmission du parasite. Vie et Milieu 35, 23–31.Google Scholar
Thèron, A. & Combes, C. (1983). Analyse génétique du rythme d 'émergence des cercaires de Schistosoma mansoni par croisement de souches à pics d'émission précoces ou tardifs. Comptes Rendus de l'Académie des Sciences de Paris 297t, 571–4.Google Scholar
Thèron, A. & Combes, C. (1988). Genetic analysis of cercarial emergence rhythms of Schistosoma mansoni. Behavior Genetics 18, 201–9.CrossRefGoogle ScholarPubMed
Wright, C. A. & Southgate, V. R. (1976). Hybridization of schistosomes and some of its implications. In Genetic Aspects of Host–Parasite Relationships (ed. Taylor, A. E. & Müller, R.), pp. 55–86. Oxford: Blackwell Scientific Publications.Google Scholar