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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (5): 153-160.DOI: 10.11686/cyxb20140517

• Orginal Article • Previous Articles     Next Articles

Testing two methods to detect voltage-gated sodium channels gene mutations in Tetranychus urticae

YANG Shun-yi1,YUE Xiu-li1,WANG Jin-jun2,SHEN Hui-min1,GUO Jin-mei1,SHEN Yi-fan1,ZHOU Xing-long1   

  1. 1.The Sino-U. S. Centers for Grazingland Ecosystem Sustainability, Key Laboratory of Grassland Ecosystem Education Ministry, College of Prataculture, Gansu Agricultural University, Lanzhou 730070, China;
    2.China Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University,Chongqing 400716, China
  • Received:2014-05-09 Online:2014-10-20 Published:2014-10-20

Abstract:

Target mutation produces high levels of resistance to pyrethroid insecticides in the spider mite Tetranychus urticae. However, as there are many techniques for detecting target mutations it would be advantageous to identify methods that are both economical and effective. Three mutations (L1022V, A1215D and F1538I) have been identified in the voltage-gated sodium channels (VGSCs) of T. urticae. We have tested the ability of two different methods, PCR product direct sequencing and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), to detect these VGSC gene mutations in two field strains (WW-R and LZ-R) of T. urticae. The results of PCR product direct sequencing showed that the A1215D and F1538I mutations existed in the VGSC genes of both the WW-R and LZ-R strains, but that the F1022V mutation was not detected. The A1215D mutation was located between domains IIS6 and IIIS1 of the VGSCs, while the F1538I mutation was identified in domain IIIS6. The PCR-RFLP method, however, proved able to identify only the A1215D mutation. Our testing of these two methods shows that detecting VGSC mutations in field strains of T. urticae has the potential to develop molecular-based monitoring that can be used to manage the species’ resistance to pyrethroid insecticides.

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