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http://dx.doi.org/10.5423/RPD.2012.18.2.073

A Duplex PCR for Detection of Phytophthora katsurae Causing Chestnut Ink Disease  

Lee, Dong-Hyeon (Department of Forest Environment Protection, Kangwon National University)
Lee, Sun-Keun (Department of Forest Environment Protection, Kangwon National University)
Kim, Hye-Jeong (Department of Forest Environment Protection, Kangwon National University)
Lee, Sang-Hyun (Division of Forest Insects and Diseases, Korea Forest Research Institute)
Lee, Sang-Yong (Department of Forest Environment Protection, Kangwon National University)
Lee, Jong-Kyu (Department of Forest Environment Protection, Kangwon National University)
Publication Information
Research in Plant Disease / v.18, no.2, 2012 , pp. 73-79 More about this Journal
Abstract
Phytophthora katsurae is a fungal pathogen responsible for chestnut ink disease. We designed two duplex primer sets (SOPC 1F/1R+KatI 3F/5R, SOPC 1-1F/1-1R+KatI 3F/5R) to detect P. katsurae. SOPC 1F/1R and SOPC 1-1F/1-1R primer pairs were designed for sequence characteristic amplification regions (SCAR) marker, and KatI 3F/5R primer pair was used for P. katsurae-specific primer designed from internal transcribed spacer (ITS) region. To assess the sensitivity of duplex PCR, genomic DNA was serially diluted 10-fold to make the final concentrations from 1 mg/ml to 1 ng/ml. The sensitivity for two primer sets were 1 ${\mu}g/ml$ and 100 ng/ml, respectively. To find detection limits for zoospores of P. katsurae, each zoospore suspension was serially diluted 10-fold to make the final concentrations from $1{\times}10^6$ to $1{\times}10^2$ cells/ml, and then DNA was extracted. The limits of detection for all of two primer sets were $1{\times}10^5$ cells/ml. All of two primer sets were specific to P. katsurae in PCR detection and did not produce any P. katsurae-specific PCR amplicons from other 16 Phytophthora species used as the control. This study shows that duplex PCR using two primer sets might be a useful tool for rapid and efficient detection of P. katsurae.
Keywords
Chestnut ink disease; Duplex PCR; Phytophthora katsurae;
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