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

Autor:	Paula Schneider, Joachim Adis, Edward G. Brede
Rok vydání:	2008
Předmět:	education.field_of_study Genetic diversity Ecology Population Biodiversity Zoology Population genetics Introduced species Biology Analysis of molecular variance Gene flow Cornops aquaticum education Ecology Evolution Behavior and Systematics
Zdroj:	Biological Journal of the Linnean Society. 95:666-676
ISSN:	1095-8312 0024-4066
DOI:	10.1111/j.1095-8312.2008.00993.x
Popis:	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, Fst/Rst/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. © 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95, 666–676.
Databáze:	OpenAIRE
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