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Plasticity of the mitochondrial genome in Podospora. Polymorphism for 15 optional sequences: group-I, group-II introns, intronic ORFs and an intergenic region

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Abstract

The mitochondrial chromosome of 15 Podo-spora anserina and one Podospora comata wild-type strains have been extensively examined for the presence of optional elements and for sequence divergence. Among the P. anserina strains, nine optional sequences were found. By comparing P. anserina with the closely related and weakly interfertile P. comata species, six additional optional sequences were detected. These optional elements correspond to mitochondrial introns belonging to different groups and subgroups (11 cases), intronic open reading frames (two cases), a complex insert and an intergenic region. Although difficult to explain, the distribution of optional mitochondrial sequences among the 15 wild-type isolates of P. anserina is far from random.

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Authors and Affiliations

  1. Centre de Génétique Moléculaire du CNRS (UPR 9061) associéà l'Universitè Pierre et Marie Curie, F-91190 Gif-sur Yvette, Cedex, France, , , , , , FR

    L. Belcour, Michèle Rossignol, France Koll, Carole H. Sellem & Catherine Oldani

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  1. L. Belcour
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  2. Michèle Rossignol
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  3. France Koll
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  4. Carole H. Sellem
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  5. Catherine Oldani
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Received: 18 July 1996 / 16 November 1996

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Belcour, L., Rossignol, M., Koll, F. et al. Plasticity of the mitochondrial genome in Podospora. Polymorphism for 15 optional sequences: group-I, group-II introns, intronic ORFs and an intergenic region. Curr Genet 31, 308–317 (1997). https://doi.org/10.1007/s002940050210

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  • DOI: https://doi.org/10.1007/s002940050210

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