Bulletin of Insectology (2007) 60, 343-344

J. Hodgetts, N. Harrison, R. Mumford, N. Boonham and M. Dickinson (2007)
Phylogenetic analysis of phytoplasmas based on sequences derived from the secA and 23S rDNA genes
Bulletin of Insectology 60 (2), 343-344
First International Phytoplasmologist Working Group Meeting (IPWG), Bologna (Italy) November 12-15, 2007
Abstract: Phylogenetic analysis of a 500 bp fragment of the secA gene has been performed on 35 phytoplasma isolates representing 10 of the 16S rDNA groups. The lineages obtained coincide with those delineated by 16S rDNA phylogenetic analysis but much greater genetic variability was evident. In addition, phylogenetic analysis based on part of the 23S rDNA gene combined with T-RFLP (terminal restriction fragment length polymorphism) analysis of this region supports the lineages. The results clearly indicate a significant delineation between the 16SrI and 16SrXII phytoplasmas and those in other 16Sr groups, and support the proposals that the coconut lethal yellowing type phytoplasmas should be divided into three `Candidatae species'.
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Database assignments for author(s): Jennifer Hodgetts, Nigel A. Harrison, Neil Boonham

Research topic(s) for pests/diseases/weeds:
identification/taxonomy

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	16SrI phytoplasma group
	16SrII phytoplasma group
	16SrX phytoplasma group
	16SrXII phytoplasma group
	16SrVII phytoplasma group
	16SrV phytoplasma group
	16SrVI phytoplasma group
	16SrIV phytoplasma group
	16SrIII phytoplasma group
	16SrXI phytoplasma group