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Population Genetic Structure in the Fresh-Water Anomuran Aegla jujuyana by Rapd Analysis

Maria Eugenia D'Amato and Daniel Corach
Journal of Crustacean Biology
Vol. 17, No. 2 (May, 1997), pp. 269-274
Published by: Brill on behalf of The Crustacean Society
DOI: 10.2307/1549277
Stable URL: http://www.jstor.org/stable/1549277
Page Count: 6
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Population Genetic Structure in the Fresh-Water Anomuran Aegla jujuyana by Rapd Analysis
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Abstract

The genetic population structure of the fresh-water crab Aegla jujuyana (Anomura) was investigated by RAPD (random amplified polymorphic DNA) analysis. In northwestern Argentina 4 populations were sampled over a range of 120 km. DNA PCR (polymerase chain reaction) amplification of 47 individuals sampled resulted in 22 amplification products (15 of them polymorphic) which were generated by 3 primers selected after testing a total of 20 primers. Data were analyzed as both biallelic systems that behave as dominant markers, and as phenotype traits. The results suggest that the populations are not subdivided and that significant gene flow exists among them. Significant differences observed between the southernmost population and the others in either band frequencies or H' affecting some loci may be due to selective pressure.

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