Sequence analysis of the ribosomal internal transcribed spacers region in spider mites (Prostigmata: Tetranychidae) occurring in citrus orchards in Eastern Spain: use for species discrimination
Identifieur interne : 000137 ( France/Analysis ); précédent : 000136; suivant : 000138Sequence analysis of the ribosomal internal transcribed spacers region in spider mites (Prostigmata: Tetranychidae) occurring in citrus orchards in Eastern Spain: use for species discrimination
Auteurs : M. A. Hurtado [Espagne] ; T. Ansaloni [Espagne] ; S. Cros-Arteil [France] ; J. A. Jacas [Espagne] ; M. Navajas [France]Source :
- Annals of Applied Biology [ 0003-4746 ] ; 2008-10.
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Abstract
Tetranychus urticae is a polyphagous mite which is an important pest of citrus worldwide. This mite can be found feeding on many plant species occurring in the citrus agrosystem moving from weeds to trees. Because field samples consist of a mixture of different Tetranychidae species, as a first step necessary to further implement population characterisation of T. urticae, species‐discriminating criteria based on molecular techniques are needed. In this study, the nucleotide variation of the internal transcribed spacers (ITS) 1 and 2 and the intergenic 5.8S fragment of nuclear rDNA of T. urticae, Tetranychus turkestani, Tetranychus evansi, Tetranychus ludeni and Panonychus citri have been determined. Results demonstrate that for these species, the rDNA ITS2 regions are much more conserved than the corresponding rDNA ITS1. The high homogeneity of the ITS2 sequence observed among the specimens of T. urticae obtained from the same ecoregion makes this DNA sequence an excellent tool for species discrimination. ITS sequences differentiate not only species but also specimens from different geographical origin. Furthermore, polymerase chain reaction–restriction fragment length polymorphism analysis of the ITS2 proved adequate for a quick screening of high numbers of field samples.
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DOI: 10.1111/j.1744-7348.2008.00250.x
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This mite can be found feeding on many plant species occurring in the citrus agrosystem moving from weeds to trees. Because field samples consist of a mixture of different Tetranychidae species, as a first step necessary to further implement population characterisation of T. urticae, species‐discriminating criteria based on molecular techniques are needed. In this study, the nucleotide variation of the internal transcribed spacers (ITS) 1 and 2 and the intergenic 5.8S fragment of nuclear rDNA of T. urticae, Tetranychus turkestani, Tetranychus evansi, Tetranychus ludeni and Panonychus citri have been determined. Results demonstrate that for these species, the rDNA ITS2 regions are much more conserved than the corresponding rDNA ITS1. The high homogeneity of the ITS2 sequence observed among the specimens of T. urticae obtained from the same ecoregion makes this DNA sequence an excellent tool for species discrimination. ITS sequences differentiate not only species but also specimens from different geographical origin. Furthermore, polymerase chain reaction–restriction fragment length polymorphism analysis of the ITS2 proved adequate for a quick screening of high numbers of field samples.</div></front></TEI><affiliations><list><country><li>Espagne</li><li>France</li></country></list><tree><country name="Espagne"><noRegion><name sortKey="Hurtado, M A" sort="Hurtado, M A" uniqKey="Hurtado M" first="M. A." last="Hurtado">M. A. Hurtado</name></noRegion><name sortKey="Ansaloni, T" sort="Ansaloni, T" uniqKey="Ansaloni T" first="T." last="Ansaloni">T. Ansaloni</name><name sortKey="Hurtado, M A" sort="Hurtado, M A" uniqKey="Hurtado M" first="M. A." last="Hurtado">M. A. Hurtado</name><name sortKey="Jacas, J A" sort="Jacas, J A" uniqKey="Jacas J" first="J. A." last="Jacas">J. A. Jacas</name></country><country name="France"><noRegion><name sortKey="Cros Rteil, S" sort="Cros Rteil, S" uniqKey="Cros Rteil S" first="S." last="Cros-Arteil">S. Cros-Arteil</name></noRegion><name sortKey="Navajas, M" sort="Navajas, M" uniqKey="Navajas M" first="M." last="Navajas">M. Navajas</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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