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Genetic diversity, population structure and gene flow in native populations of a proposed biocontrol agent (Cornops aquaticum)

MPG-Autoren
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Brede,  Edward G.
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Adis,  Joachim
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Zitation

Brede, E. G., Adis, J., & Schneider, P. (2008). Genetic diversity, population structure and gene flow in native populations of a proposed biocontrol agent (Cornops aquaticum). Biological Journal of the Linnean Society, 25(4), 666-676. doi:10.1111/j.1095-8312.2008.00993.x.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-000F-D63A-E
Zusammenfassung
The semiaquatic grasshopper Cornops aquaticum is native to South America, with a distribution as far south as the Argentinean pampas and as far north as the Gulf of Mexico. This grasshopper is being proposed as a form of biological control agent for the invasive aquatic macrophyte (Eichhornia crassipes) in South Africa. The results of a molecular study (six microsatellite loci) conducted on 11 C. aquaticum populations is presented. Unlike in contiguous mainland South American populations, we found genetic diversity to be lowest in a South African quarantine population, with reduced values in two other isolated populations from South America. In addition, F-st/R-st/analysis of molecular variance and Bayesian cluster analysis suggested high levels of connectivity between mainland populations. The implications of these findings and their relationship to those of a recent morphological study suggest that the suitability of C. aquaticum as a form of biocontrol might be unpredictable at best.