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http://dx.doi.org/10.5656/KSAE.2015.04.0.004

Construction of cDNA Library for Using Virus-induced Gene Silencing (VIGS) Vector with the Sweetpotato Whitefly, Bemisia tabaci(Hemiptera: Aleyrodidae)  

Ko, Na Yeon (Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Lim, Hyoun Sub (Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Yu, Yong Man (Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Youn, Young Nam (Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Publication Information
Korean journal of applied entomology / v.54, no.2, 2015 , pp. 91-97 More about this Journal
Abstract
The sweetpotato whitefly, Bemisia tabaci, is the major insect pest that transmitted over 100 plant viruses including tomato yellow leaf curl virus (TYLCV) of tomato plant as virus vector in the world. In this study, cDNA library of whitefly was constructed using Gateway system for selecting target gene in order to control of B. tabaci using virus-induced gene silencing (VIGS) vector with RNAi. First of all, when using oligo d(T) rimer, the calculated titer of cDNA library was confirmed with $1.4{\times}10^4$ clones and average insert sizes was confirmed with 1 kb. However, insert size was very big for construction of cDNA. Otherwise, when using attB-N25 random primer and sonication for 6 sec, the calculated titer of cDNA library was confirmed with $1.04{\times}10^5$ clones. But mostly insert band wasn't identified on the electrophoresis, because it seemed that insert size is too small (${\leq}100bp$), also the size of identified insert was somewhat big. Finally, when using oligo d(T) primer and sonication for 1 sec, cDNA insert of whitefly was appropriated for VIGS with 300-600 bp. However, cDNA sequence included a poly A and titer was very low to $5.2{\times}10^2$ clones. It was supposed that heat shock transformation was used instead of electro-transformation. It is considered that when constructing cDNA library for using VIGS vector, (1) random primer should be used for First strand cDNA synthesis in order to remove poly A and (2) sonication for 1 sec should be performed in order to get appropriated insert size and (3) electro-transformation should be performed in order to improve transformation efficiency.
Keywords
Bemisia tabaci; cDNA library; RNAi; Gateway cloning;
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