European Journal of Plant Pathology

, Volume 146, Issue 4, pp 861–880 | Cite as

Morphological and molecular identification of potato and cereal cyst nematode isolates from Algeria and their phylogenetic relationships with other populations from distant theirgeographical areas

  • Nadia Tirchi
  • Alberto Troccoli
  • Elena Fanelli
  • Aissa Mokabli
  • Fazia Mouhouche
  • Francesca De LucaEmail author


A nematode survey conducted in 2013 in Algeria, revealed that potato cyst nematodes (PCN) and cereal cyst nematodes (CCN) are widely distributed in several potato and cereal growing regions of the country. Sixteen PCN populations from five localities and five CCN populations from four of these localities were collected and characterized at the morphological and molecular levels. The PCN populations were identified as Globodera rostochiensis and G. pallida occurring separately or in mixed populations. Two species of CCN were detected. Heterodera avenae was found in four localities, whereas H. hordecalis only in one locality in association with H. avenae. The morphological and morphometric identification of PCN and CCN was confirmed by diagnostic ITS-RFLP profiles and sequencing. Phylogenetic analysis of the ITS, D2-D3 expansion domains of the 28S rRNA gene and 18S rRNA gene was made for PCN and CCN populations. Globodera pallida and G. rostochiensis from Algeria show great similarity with European and South American populations. Because of the high divergence among Algerian populations of G. pallida and G. rostochiensis it can be assumed that they were multi-introduced in Algeria. The most divergent population of G. pallida, that formed a well-separated group with some populations from Chile and Peru, suggests a later or independent introduction of this population into Algeria. Heterodera avenae and H. hordecalis formed a well-supported cluster with the corresponding populations.


CCN Globodera pallida G. rostochiensis Heterodera avenae H. horedecalis Identification PCN PCR-RFLP Sequencing Phylogeny 



The authors wish to thank Dr. Nicola Greco for critical review of the manuscript and helpful suggestions and discussions.


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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 2016

Authors and Affiliations

  • Nadia Tirchi
    • 1
  • Alberto Troccoli
    • 2
  • Elena Fanelli
    • 2
  • Aissa Mokabli
    • 1
  • Fazia Mouhouche
    • 3
  • Francesca De Luca
    • 2
    Email author
  1. 1.University of Khemis MilianaAin DeflaAlgeria
  2. 2.Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche (CNR)BariItaly
  3. 3.National Upper School of AgronomyAlgiersAlgeria

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