Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/7258
Title: Transgenerational Sub-Lethal Pyrethroid Exposure Affects Shape Variation and Fluctuating Asymmetry in Seed Beetles
Authors: Budečević, Sanja
Predojević, Dragana 
Đorđević, Mirko
Vlajnić, Lea 
Stojković, Oliver
Stojković, Biljana 
Savković, Uroš
Keywords: Acanthoscelides obtectus;;Geometric morphometrics;;Experimental evolution;;Developmental instability;;Fluctuating asymmetry;;Insecticide resistance;;Cypermethrin.
Issue Date: 2024
Rank: M22
Publisher: MDPI
Journal: Symmetry
Volume: 16
Issue: 8
Start page: 995
Abstract: 
One method of crop protection is the application of a widely used group of pesticides—pyrethroids. As xenobiotics, sub-lethal doses of insecticides cause stress in pests, resulting in a change in the shape and size of their organs or bodies. The stress caused by pesticides may lead to acute destabilization of development, but also to transgenerational canalization through the process of genetic assimilation. Fluctuating asymmetry (FA), small random deviations between the right and left sides of bilaterally symmetrical traits, is an outcome of developmental instability and is a measurable indicator of phenotypic response to stress. We exposed four populations of the seed beetle Acanthoscelides obtectus to sub-lethal doses of cypermethrin for ten generations in a laboratory evolution experiment. Using geometric morphometrics, we analyzed size and shape changes and the level of fluctuating asymmetry in untreated beetles and in samples from the fifth and tenth generation. Exposure over ten generations led to an increase in the body size of the beetles, shortening of their pronotum and elongation of their thorax and abdomen. After ten generations of exposure to cypermethrin, FA levels decreased, indicating a canalization of development. This study provides new insights into the phenotypic markers of environmental pollution from agricultural activities.
URI: https://biore.bio.bg.ac.rs/handle/123456789/7258
ISSN: 2073-8994
DOI: 10.3390/sym16080995
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