Comprehensive Evaluation of Candidate Reference Genes for QRT-PCR Studies of Gene Expression in Mustard Aphid, Lipaphis Erysimi (Kalt)

Overview

Journal Sci Rep

Specialty Science

Date 2016 May 12

PMID 27165720

Citations 47

Authors

Murali Krishna Koramutla

Raghavendra Aminedi

Ramcharan Bhattacharya

Affiliations

Soon will be listed here.

Abstract

Mustard aphid, also known as turnip aphid (Lipaphis erysimi) is a major insect pest of rapeseed-mustard group of crops. Tremendous economic significance has led to substantial basic research involving gene-expression studies in this insect species. In qRT-PCR analysis of gene-expression, normalization of data against RNA variation by using appropriate reference gene is fundamental. However, appropriate reference genes are not known in case of L. erysimi. We evaluated 11 candidate reference genes for their expression stability in 21 samples of L. erysimi subjected to various regimes of experimental treatments. Unlike other studies, we validated true effects of the treatments on the samples either by gene-expression study of an associated marker gene or by biochemical tests. In the validated samples, expression stability of the reference genes was analysed by employing four different statistical softwares geNorm, NormFinder, BestKeeper and deltaCt. Drawing consensus on the results from different softwares, we recommend three best reference genes 16S, RPS18 and RPL13 for normalization of qRT-PCR data in L. erysimi. This study provides for the first time a comprehensive list of suitable reference genes for mustard aphid and demonstrates the advantage of using more than one reference gene in combination for certain experimental conditions.

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