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Sexual Reproduction and Recruitment in Posidonia Oceanica (L.) Delile, a Genetic Diversity Study

  • L. Orsini
  • S. Acunto
  • L. Piazzi
  • G. Procaccini

Abstract

The aim of our analysis was to provide evidence of the contribution that sexual reproduction has for increasing genetic diversity in P. oceanica meadows. The genetic diversity of three established populations and three adjacent seedling patches located along the Tuscany coast were surveyed. Seedling patches had higher values of heterozygosity and number of distinct genotypes but comparable number of alleles in respect to adult meadows, as ascertained using microsatellite marker. Assuming that seedlings are the result of sexual reproduction, high levels of inbreeding and self-fertilization can account for the slight increase of genetic variability. Our results also indicate that recruitment can occur from propagules originating outside the local population, limiting population genetic isolation at the given spatial scale.

Keywords

Sexual Reproduction Polymorphic Locus Distinct Genotype Genetic Diversity Study Posidonia Oceanica 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Caye G, Meinesz A (1992) Analyse des modalités de la multiplication végétative et de la reproduction sexuée de Posidonia oceanica et de ses conséquences sur la constitution génétique des herbiers. Rapp Comm Int Mer Méditerr 33: 32Google Scholar
  2. Gambi MC, Buia MC, Mazzella L (1996) Record of a diffuse germination of Posidonia oceanica (L.) Delile in the central Adriatic Sea (Croatia). Biol Mar Mediterr 3(1): 467–470Google Scholar
  3. Goldstein DB, Ruiz Linares A, Cavalli-Sforza LL, Feldman MW (1995) Genetic absolute dating based on microsatellites and the origin of the modern humans. Proc Nad Acad Sci USA 92: 6723–6727CrossRefGoogle Scholar
  4. Goodman SJ (1997) RST CALC: a collection of computer programmes for calculating unbiased estimates of genetic differentiation and determining their significance for microsatellite data. Mol Ecol 6: 881–885CrossRefGoogle Scholar
  5. Goudet J (1995) Fstat version 1.2: a computer programme to calculate F-statistics. J Hered 86: 485–486Google Scholar
  6. Les DH (1988) Breeding systems, population structure and evolution in hydrophilous angiosperms. Ann Missouri Bot Gard 75: 819–835CrossRefGoogle Scholar
  7. Meinesz A, Caye G, Locques F, Molenaar H (1993) Polymorphism and development of Posidonia oceanica transplanted from different parts of the Mediterranean into the National Park of Port-Cros. Bot Mar 36: 209–216CrossRefGoogle Scholar
  8. Piazzi L, Acunto S, Balestri E, Cinelli F (1996) Osservazioni preliminari sulla germinazione di semi e sviluppo in situ di piantine di Posidonia oceanica (L.) Delile. Inf Bot Ital 28: 61–66Google Scholar
  9. Procaccini G, Alberte RS, Mazzella L (1996) Genetic structure of the seagrass Posidonia oceanica in the Western Mediterranean: ecological implications. Mar Ecol Prog Ser 140: 153–160CrossRefGoogle Scholar
  10. Procaccini G, Mazzella L (1996) Genetic variability and reproduction in two Mediterranean seagrasses. In: Kuo J, Phillips RC, Walker DI, Kirkman H (eds) Seagrass biology. Proc Int Workshop, Sciences UWA, Nedlands, Western Australia, pp 85–92Google Scholar
  11. Procaccini G, Mazzella L (1998) Population genetic structure and gene flow in the seagrass Posidonia oceanica (L.) assessed using a microsatellite analysis. Mar Ecol Prog Ser 169: 133–141CrossRefGoogle Scholar
  12. Procaccini G, Waycott M (1998) Microsatellite loci identified in the seagrass Posidonia oceanica (L) Delile. J Hered 89(6): 562–568CrossRefGoogle Scholar
  13. Raymond M, Rousset F (1995) GENEPOP (version 1.2): a population genetics software for exact tests and ecumenism. J Hered 86: 248–249Google Scholar
  14. Waycott M, Sampson J (1997) The mating system of an hydrophilous angiosperm Posidonia australis (Posidoniaceae). Am J Bot 84(5): 621–625PubMedCrossRefGoogle Scholar
  15. Weir BS, Cockerham CC (1984) Estimating F-statistics for the analysis of population structure. Evolution 38(6): 1358–1360CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Italia 2001

Authors and Affiliations

  • L. Orsini
    • 1
  • S. Acunto
    • 2
  • L. Piazzi
    • 2
  • G. Procaccini
    • 1
  1. 1.Stazione Zoologica “A. Dohrn”Laboratorio di Ecologia del BenthosIschia (Napoli)Italy
  2. 2.Dipartimento di Scienze dell’Uomo e dell’AmbienteUniversità di PisaPisaItaly

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