Abstract
Three haplotypes of the recently discovered bacterium species “Candidatus Liberibacter solanacearum” are described and related to geographic ranges. The first two are associated with Zebra Chip/Psyllid Yellows of potatoes and other solanaceous plants, vectored by the tomato/potato psyllid Bactericera cockerelli in North and Central America and New Zealand. The third is associated with diseased carrots in Finland and vectored by the carrot psyllid Trioza apicalis. The haplotypes are described by SNPs on the 16s rRNA, 16s/23s ISR and 50s rplJ and rplL ribosomal protein genes. These SNPs are inherited as a package across the three genes. Haplotype “a” has been found primarily from Honduras and Guatemala through western Mexico to Arizona and California, and in New Zealand. Haplotype “b” is currently known from eastern Mexico and northwards through Texas to south central Washington. These haplotypes show some range overlap in Texas, Kansas and Nebraska. The haplotypes are not yet known to elicit biological differences in the plant or insect hosts. These apparently stable haplotypes suggest separate bacterial populations of long standing.
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Acknowledgments
We thank Mark Fiers and Jeanne Jacobs (Plant & Food Research Ltd, New Zealand) for their assistance with SNP analysis and description. We are also grateful to Anne Nissinen (MTT Agrifood Research Finland) for carrot psyllid and plant material used to generate sequences used in the study. In addition, we are thankful to all submitters of sequences to GenBank that we used in this study.
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Nelson, W.R., Fisher, T.W. & Munyaneza, J.E. Haplotypes of “Candidatus Liberibacter solanacearum” suggest long-standing separation. Eur J Plant Pathol 130, 5–12 (2011). https://doi.org/10.1007/s10658-010-9737-3
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DOI: https://doi.org/10.1007/s10658-010-9737-3