Journal of Chemical Ecology (2004) 30, 2515-2525

Christian C. Figueroa, Jean-Christophe Simon, Jean-Francois Gallic, Nathalie Prunier-Leterme, Lucia M. Briones, Charles-Antoine Dedryver and Hermann M. Niemeyer (2004)
Effect of host defense chemicals on clonal distribution and performance of different genotypes of the cereal aphid Sitobion avenae
Journal of Chemical Ecology 30 (12), 2515-2525
Abstract: Five microsatellite loci were used to study the genetic variability and population structure of Sitobion avenae (Hemiptera: Aphididae) on some of its host plants. Individuals were collected in Chile from different cultivated and wild Poaceae. Forty-four multilocus genotypes were found among the 1052 aphids analyzed, of which four represented nearly 90% of the sample. No specialist genotypes were found, although some preferred hosts endowed with chemical defenses, i.e., hydroxamic acids (Hx), while others preferred comparatively undefended hosts. Performances of some predominant and some rare genotypes were evaluated on plants differing in their Hx levels. Significant differences in performance were found among clones, the two most common genotypes showing no differences in performance among all hosts tested, and the rare genotypes showing enhanced performance on the host with highest Hx level. A hypothesis is proposed whereby the appearance of rarer genotypes is in part related to the presence of Hx.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Christian C. Figueroa, Hermann M. Niemeyer, Charles-Antoine Dedryver

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitobion avenae		Chile (continental)