Acta Entomologica Sinica (2008) 51, 150-154

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Dong Chu, Bao-Yun Xu, Qing-Jun Wu, Fang-Hao Wan, Li-Feng Xiao, Guo-Ren Zhu and You-Jun Zhang (2008)
[Thiamethoxam application can decrease the genetic diversity of Bemisia tabaci (Gennadius) biotype B]
Acta Entomologica Sinica 51 (2), 150-154
Abstract: The effects of the application of thiamethoxam on the genetic structure of invasive Bemisia tabaci (Gennadius) biotype B were analyzed using four polymorphic microlsatellite loci. The results showed that resistance of B. tabaci biotype B selected by thiamethoxam for 18 generations was 19.08 times that of the susceptible population. Compared with the genetic structure of the control population (susceptible population) the distribution of the allele frequency also changed. Meanwhile, the average value of number of alleles (Na decreased from 2.750 to 2. 250; gene heterozygosity (h) decreased from 0.459 to 0. 299; polymorphism information content (PIC) decreased from 0.393 to 0.250; and the effective number of alleles (Ne) decreased from 2.051 to 1.488. The standard genetic distance between the susceptible and resistant populations was 0.15. The results suggested that application of insecticide might be one important factor affecting the genetic structure of B. tabaci biotype B.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Dong Chu, Qing Jun Wu, Fang Hao Wan

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
pesticide resistance of pest

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Bemisia tabaci biotype MEAM1
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