Am. J. Bot.
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(American Journal of Botany. 2003;90:364-369.)
© 2003 Botanical Society of America, Inc.

Population Biology

Random amplified polymorphic DNA assessment of diversity in western Mediterranean populations of the seagrass Posidonia oceanica1

Maria Angeles Jover2, Lucas del Castillo-Agudo3, Manuel Garcia-Carrascosa2 and Juan Segura4,5

2Laboratorio de Biología Marina, Departamento de Biología Animal, Universidad de Valencia, Valencia, Spain; 3Departamento de Microbiología y Ecología, Universidad de Valencia, Valencia, Spain; 4Departamento de Biología Vegetal, Universidad de Valencia, Valencia, Spain

Posidonia oceanica is an endemic Mediterranean seagrass species that has often been assumed to contain low levels of genetic diversity. Random amplified polymorfic DNA (RAPD) markers were used to assess genetic diversity among five populations from three geographical regions (north, central, and south) of the western Mediterranean Sea. Stranded germinating seeds from one of the central populations were also included in the analysis. Forty-one putative genets were identified among 76 ramets based on 28 RAPD markers. Genotypic diversity strongly depended on the spatial structure, age, and maturity of the meadows. The lowest clonal diversity was found in the less structured and youngest prairies. Conversely, a high genotypic diversity was found in the highly structured meadows. The genotypic diversity in these meadows was at the same level as in P. australis and higher than previously reported data for P. oceanica populations in the Tyrrhenian Sea near the coast of Italy.

Key Words: clonal analysis • genotypic and genetic diversity • population structure • Posidonia oceanica • RAPDs • seagrass




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S. Arnaud-Haond, F. Alberto, S. Teixeira, G. Procaccini, E. A. Serrao, and C. M. Duarte
Assessing Genetic Diversity in Clonal Organisms: Low Diversity or Low Resolution? Combining Power and Cost Efficiency in Selecting Markers
J. Hered., July 1, 2005; 96(4): 434 - 440.
[Abstract] [Full Text] [PDF]


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