Detection, distribution, and genetic variability of ‘Candidatus Liberibacter’ species associated with Zebra Complex disease of potato in North America

  • Wen A
  • Mallik I
  • Alvarado V
 et al. 
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ABSTRACT The specificity and sensitivity of polymerase chain reaction (PCR) primers developed for ‘Candidatus Liberibacter solanacearum’ and ‘Candidatus Liberibacter psyllaurous’ were evaluated in conventional and real-time PCR assays. All PCR primers were specific for ‘Ca. L. psyllaurous’ and ‘Ca. L. solanacearum’ insomuch as they did not detect other prokaryotic plant pathogens that affect potato except for the putative pathogens associated with psyllid-yellows and haywire. Conventional PCR assays were capable of detecting 0.19 to 1.56 ng of total DNA per reaction, and real-time PCR was found capable of detecting 1.56 to 6.25 ng of total DNA per reaction, depending on the specific PCR primer set used. ‘Ca. Liberibacter’ species associated with zebra complex disease (ZC) was confirmed in plants affected by this disease throughout Texas from 2005 to 2008, in seed tubers produced in Wyoming in 2007, and in Colorado, Kansas, Nebraska, and Mexico in 2008. A multiplex PCR assay using ‘Ca. L. solanacearum’–spe...

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  • a. Wen

  • I. Mallik

  • V. Y. Alvarado

  • J. S. Pasche

  • X. Wang

  • W. Li

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