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16 November 2015 Double-Stranded RNA-Mediated Silencing of Sodium Channel and Ultraspiracle Genes in Aphis gossypii (Hemiptera: Aphididae)
B. N. Chaitanya, R. Asokan, T. Sita, K. B. Rebijith, N. K. Krishna Kumar
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Abstract

Overuse of chemical insecticides such as organophosphates, pyrethroids, and endosulfan in managing notorious sap-sucking insect pests such as the melon aphid, Aphis gossypii Glover, resulted in insecticide resistance. To combat the above and bring out the novel pest control strategy, we implemented ribonucleic acid interference (RNAi), a reverse genetics tool in silencing the target genes. RNAi is a sequence-specific gene-silencing mechanism triggered by double-stranded ribonucleic acid (dsRNA). The efficiency of RNAi is reliant upon concentration of dsRNA, mode of delivery, gene targets, insect species, etc. The objective of the present study was to assess the extent of down-regulation by using two different concentrations of dsRNA specific to sodium channel (AgSCN) and ultraspiracle genes (AgUSP) (0.0625 and 0.125 mg/ml) with two time intervals (48 and 96 h) through oral delivery. The extent of declined gene expression and percentage mortality chronicled for sodium channel and USP is proportional to the dsRNA concentration. Thus, our study affirms the outlook in the development of RNAi which can form a potent species-specific tool in the management of insect pests such as A. gossypii.

© The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
B. N. Chaitanya, R. Asokan, T. Sita, K. B. Rebijith, and N. K. Krishna Kumar "Double-Stranded RNA-Mediated Silencing of Sodium Channel and Ultraspiracle Genes in Aphis gossypii (Hemiptera: Aphididae)," Annals of the Entomological Society of America 109(1), 92-98, (16 November 2015). https://doi.org/10.1093/aesa/sav107
Received: 20 August 2015; Accepted: 16 October 2015; Published: 16 November 2015
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KEYWORDS
Aphis gossypii
dsRNA
RNAi
sodium channel
ultraspiracle gene
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