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The leafy liverwortPorella baueri (Porellaceae) is an allopolyploid

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Abstract

Porella platyphylla andP. cordaeana are genetically well differentiated in Europe (I = 0.486). Isozyme data from 156 European colonies reveal thatP. baueri is polyploid and could be an interspecific hybrid between these two species. It is characterized by large lobe cells, toothed margins of the female bracts, and ciliate perianth mouth. Correspondence analysis using morphological characters revealed that its colonies cluster into two geographicallý separated groups, similar to one or other of the putative parental species. These results agree with the genetic analysis, that also revealed two main allelic associations, each with a distinct geographical range. We hypothesize that this pattern was produced by introgression subsequent to hybridization, or by gene silencing. The discovery of this new, allopolyploid species suggests that hybridization is an important evolutionary process in liverworts.

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  1. Laboratoire de Cryptogamie, Muséum National d'Histoire Naturelle, CNRS GDR 1005 ‘Systématique moléculaire’, 12 rue Buffon, F-75005, Paris, France

    M. C. Boisselier-Dubayle, J. Lambourdiere & H. Bischler

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  1. M. C. Boisselier-Dubayle
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  2. J. Lambourdiere
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  3. H. Bischler
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Boisselier-Dubayle, M.C., Lambourdiere, J. & Bischler, H. The leafy liverwortPorella baueri (Porellaceae) is an allopolyploid. Pl Syst Evol 210, 175–197 (1998). https://doi.org/10.1007/BF00985667

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