Abstract

“Candidatus Liberibacter asiaticus” (Las) causes huanglongbing, also known as citrus greening, in citrus crops widespread across the major citrus production areas of the world, especially Asia, Brazil and southern USA. Some studies suggest that single nucleotide polymorphisms on the 16S rRNA gene represent haplotypes and that these represent strains within geographic regions. Re-analysis of all available accessions of the rDNA sequences deposited in GenBank and identified as Las fails to support the reported presence of unique strains based on this taxonomically important rDNA sequence. Therefore geographically described strains also fail.

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