Bulletin of Entomological Research (2012) 102, 573-582

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L.M. Boykin, P. De Barro, D.G. Hall, W.B. Hunter, C.L. McKenzie, C.A. Powell and R.G. Shatters Jr. (2012)
Overview of worldwide diversity of Diaphorina citri Kuwayama mitochondrial cytochrome oxidase 1 haplotypes: two Old World lineages and a New World invasion
Bulletin of Entomological Research 102 (5), 573-582
Abstract: Relationships among worldwide collections of Diaphorina citri (Asian citrus psyllid) were analyzed using mitochondrial cytochrome oxidase I (mtCOI) haplotypes from novel primers. Sequences were produced from PCR amplicons of an 821bp portion of the mtCOI gene using D. citri specific primers, derived from an existing EST library. An alignment was constructed using 612bps of this fragment and consisted of 212 individuals from 52 collections representing 15 countries. There were a total of eight polymorphic sites that separated the sequences into eight different haplotypes (Dcit-1 through Dcit-8). Phylogenetic network analysis using the statistical parsimony software, TCS, suggests two major haplotype groups with preliminary geographic bias between southwestern Asia (SWA) and southeastern Asia (SEA). The recent (within the last 15 to 25 years) invasion into the New World originated from only the SWA group in the northern hemisphere (USA and Mexico) and from both the SEA and SWA groups in the southern hemisphere (Brazil). In only one case, Reunion Island, did haplotypes from both the SEA and SWA group appear in the same location. In Brazil, both groups were present, but in separate locations. The Dcit-1 SWA haplotype was the most frequently encountered, including ~50% of the countries sampled and 87% of the total sequences obtained from India, Pakistan and Saudi Arabia. The second most frequently encountered haplotype, Dcit-2, the basis of the SEA group, represented ~50% of the countries and contained most of the sequences from Southeast Asia and China. Interestingly, only the Caribbean collections (Puerto Rico and Guadeloupe) represented a unique haplotype not found in other countries, indicating no relationship between the USA (Florida) and Caribbean introductions. There is no evidence for cryptic speciation for D. citri based on the COI region included in this study.
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Database assignments for author(s): Cindy L. McKenzie, David G. Hall, Wayne Hunter

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
surveys/sampling/distribution


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Diaphorina citri China (south)
Diaphorina citri Indonesia
Diaphorina citri Taiwan
Diaphorina citri Thailand
Diaphorina citri Vietnam
Diaphorina citri India
Diaphorina citri Pakistan
Diaphorina citri Pakistan
Diaphorina citri Mauritius
Diaphorina citri Saudi Arabia
Diaphorina citri Mexico
Diaphorina citri Puerto Rico
Diaphorina citri Brazil (south)
Diaphorina citri Guadeloupe
Diaphorina citri Reunion Island
Diaphorina citri U.S.A. (mid S)
Diaphorina citri Citrus (genus) U.S.A. (SE)