4.4 Article

Integrative diagnosis and molecular phylogeny of dagger and needle nematodes of olives and grapevines in the island of Crete, Greece, with description of Xiphinema cretense n. sp (Nematoda, Longidoridae)

Journal

EUROPEAN JOURNAL OF PLANT PATHOLOGY
Volume 140, Issue 3, Pages 563-590

Publisher

SPRINGER
DOI: 10.1007/s10658-014-0488-4

Keywords

Bayesian inference; Longidorids; Longidorus; Maximum likelihood; rDNA; New geographic record; Xiphinema

Funding

  1. Hellenic Agricultural Organization-DEMETER [KBBE 219262]
  2. Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)
  3. 'Consejeria de Economia, Innvovacion y Ciencia' from Junta de Andalucia [AGR-136]
  4. Union Europea, Fondo Europeo de Desarrollo regional, Una manera de hacer Europa
  5. Ministerio de Economia y Competitividad of Spain

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The occurrence and geographic distribution of longidorid nematode species inhabiting the rhizosphere of cultivated and wild olive and grapevine in Crete Island were investigated. Morphological and morphometrical studies identified five Longidorus and six Xiphinema species, with frequencies of prevalence (for wild and cultivated olives and grapevines, respectively) as follows: Longidorus closelongatus (2.0-13.3 %), L. cretensis (1.0-6.7 %), L. moesicus (13.3 % only in grapevines), L. orientalis (3.3 % only in grapevines), L. pseudoelongatus (7.0 % only in olives), Xiphinema cretense n. sp. (3.0 % only in olives), X. index (3.0-23.3 %), X. israeliae (6.3 % only in olives), X. italiae (3.3-10.0 %), X. pachtaicum (26.7-42 %) and X. simile (3.3 % only in grapevines). Xiphinema cretense n. sp. is characterized by a body size 3,872-6,135 mu m long, lip region anteriorly rounded, separated from the rest of the body by a depression, odontostyle and odontophore 140.6 and 80.3 mu m long respectively, vulva position at 46.0-50.5 %, female tail 31.0-38.0 mu m long, nearly hemispherical with curvature essentially dorsal and with a tip completely rounded or presenting a very short bulge, c ratio (119.1-186.9), c' ratio (0.7-0.8). Molecular characterisation using D2-D3 expansion regions of 28S rRNA, 18S rRNA and ITS1-rRNA was carried out and maximum likelihood and Bayesian inference analysis were used to reconstruct phylogenetic relationships among these species and with other longidorids.

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