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One species, one genotype: no genotypic variability in the extremely narrow endemic tetraploid Agrostis barceloi (Gramineae)

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Abstract

We used allozyme electrophoresis to survey genetic diversity of Agrostis barceloi L.Sáez & Rosselló, an extremely narrow endemic species from the island of Majorca (Balearic Islands, Western Mediterranean Basin). This species is a tetraploid with a single natural population of less than 100 individuals. All analyzed individuals of A. barceloi showed the same genotype. Four out of 18 interpretable loci showed fixed heterozygosity (thus supporting an allopolyploid origin). The genotypic uniformity of this species may be attributed to a founder effect associated with a dispersal event of its ancestor from the continent, a very small current effective population size (N e), and a series of natural or anthropogenic threats affecting the population. We propose several conservation measures such as seed storing and plant production for further reinforcements (which do not need any previous work for selecting individuals because of the genetic uniformity). In addition, we suggest the preservation of the mountain summit where the species is found (Puig Major), which would also positively influence the conservation of other co-occurring ENEs and other rare and threatened species.

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Acknowledgments

We thank two anonymous referees and the associate editor for their helpful comments. An ADR fellowship (Universitat de Barcelona) and a postdoctoral “Beatriu de Pinós” fellowship (Generalitat de Catalunya) were awarded to S. Massó and J. López-Pujol, respectively.

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Authors and Affiliations

  1. BioC-GReB, Laboratori de Botànica, Facultat de Farmàcia, Universitat de Barcelona, Avinguda Joan XXIII s/n, Catalonia, 08028, Barcelona, Spain

    Sergi Massó & Cèsar Blanché

  2. BioC-GReB, Botanic Institute of Barcelona (IBB-CSIC-ICUB), Passeig del Migdia s/n, Catalonia, 08038, Barcelona, Spain

    Sergi Massó & Jordi López-Pujol

  3. Unitat de Botànica, Facultat de Biociències, Universitat Autònoma de Barcelona, Catalonia, 08193, Barcelona, Spain

    Javier López-Alvarado & Llorenç Sáez

  4. Societat d’Història Natural de les Illes Balears C./Margarida Xirgu, 16, baixos, Illes Balears, 07011, Palma de Mallorca, Spain

    Llorenç Sáez

Authors
  1. Sergi Massó
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  2. Jordi López-Pujol
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  3. Javier López-Alvarado
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  4. Cèsar Blanché
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  5. Llorenç Sáez
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Correspondence to Sergi Massó.

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Handling editor: Michal Ronikier.

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Massó, S., López-Pujol, J., López-Alvarado, J. et al. One species, one genotype: no genotypic variability in the extremely narrow endemic tetraploid Agrostis barceloi (Gramineae). Plant Syst Evol 302, 609–615 (2016). https://doi.org/10.1007/s00606-016-1283-9

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  • DOI: https://doi.org/10.1007/s00606-016-1283-9

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