Plant Protect. Sci., 2010, 46(3):107-115 | DOI: 10.17221/50/2009-PPS

Quantification of Tilletia caries and Tilletia controversa mycelium in wheat apical meristem by real-time PCR

Miloslav Zouhar1, Jana Mazáková1, Evženie Prokinová1, Marie Váňová2, Pavel Ryšánek1
1 Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague-Suchdol, Czech Republic
2 Agricultural Research Institute Kroměříž, Ltd., Kroměříž, Czech Republic

In the Czech Republic, three closely related species of the genus Tilletia belong to pathogens that cause significant losses of wheat crops by replacing grains with a mass of teliospores. A quantitative real-time qPCR assay using SYBR Green I has been developed to quantify the amount of T. caries and T. controversa mycelium in apical meristems of different wheat varieties. The real-time PCR reaction was validated by evaluating selected extraction methods, examining the specificity of designed target-specific IGS primers and verifying the optimised amplification reaction on naturally infected wheat plants. The PCR detection limit for the specific identification of fungal DNA was 0.22 ng of mycelium, and the negative correlation between the target DNA quantity and cycle threshold (Ct) was high with a coefficient of determination of R2 = 0.992. The developed method was used to quantify pathogens mycelium in five wheat varieties in the range from 0.34 ng to 15 µg per one growing tip.

Keywords: Tilletia spp.; real-time PCR; apical meristem; absolute quantification

Published: September 30, 2010  Show citation

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Zouhar M, Mazáková J, Prokinová E, Váňová M, Ryšánek P. Quantification of Tilletia caries and Tilletia controversa mycelium in wheat apical meristem by real-time PCR. Plant Protect. Sci. 2010;46(3):107-115. doi: 10.17221/50/2009-PPS.
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