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  • Title: Reference gene selection for qRT-PCR in Caragana korshinskii Kom. under different stress conditions.
    Author: Yang Q, Yin J, Li G, Qi L, Yang F, Wang R, Li G.
    Journal: Mol Biol Rep; 2014; 41(4):2325-34. PubMed ID: 24452712.
    Abstract:
    Caragana korshinskii Kom., which is widely distributed in the northwest China and Mongolia, is an important forage bush belonging to the legume family with high economic and ecological value. Strong tolerance ability to various stresses makes C. korshinskii Kom. a valuable species for plant stress research. In this study, suitable reference genes for quantitative real-time reverse transcription PCR (qRT-PCR) were screened from 11 candidate reference genes, including ACT, GAPDH, EF1α, UBQ, TUA, CAP, TUB, TUB3, SKIP1, SKIP5-1 and SKIP5-2. A total of 129 samples under drought, heat, cold, salt, ABA and high pH treatment were profiled, and software such as geNORM, NormFinder and BestKeeper were used for reference gene evaluation and selection. Different suitable reference genes were selected under different stresses. Across all 129 samples, GAPDH, EF1α and SKIP5-1 were found to be the most stable reference genes, and EF1α+SKIP5-1 is the most stable reference gene combination. Conversely, TUA, TUB and SKIP1 were not suitable for using as reference genes owing to their great expression variation under some stress conditions. The relative expression levels of CkWRKY1 were detected using the stable and unstable reference genes and their applicability was confirmed. These results provide some stable reference genes and reference gene combinations for qRT-PCR under different stresses in C. korshinskii Kom. for future research work, and indicate that CkWRKY1 plays essential roles in response to stresses in C. korshinskii.
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