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Journal of Theoretical Biology ] (]]]]) ]]]]]] Letter to the Editor
 

Summary: Journal of Theoretical Biology ] (]]]]) ]]]]]]
Letter to the Editor
Accumulation of deleterious mutations in hybridogenetic
organisms
European water frog hybrids Rana esculenta (Rana
ridibunda Rana lessonae) reproduce hemiclonally,
transmitting only the ridibunda (R), and excluding the
lessonae (L), genome through their gametes; hybridity is
restored at each generation by matings of esculenta (RL)
with coexisting lessonae (LL). This peculiar genetic
system is called hybridogenesis and may be considered
as an extreme form of meiotic drive, in which a whole
genome is transmitted at the expenses of the other.
In other words, R. ridibunda is a genetic parasite of
R. lessonae.
Hybridogenesis is known for another amphibian
species (a hybrid probably between R. esculenta and
Rana perezi) and in other animal taxa, for example
Poeciliopsis (Schultz, 1966), Bacillus (Mantovani and
Scali, 1992), Trophidophoxinellus (Carmona et al., 1997).

  

Source: Archetti, Marco - Department of Organismic and Evolutionary Biology, Harvard University

 

Collections: Biology and Medicine