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First Report of Xiphinema Diffusum from Pakistan.

E Shokoohi1, K Nasira2, E Iqbal2

  • 1Green Biotechnologies Research Centre of Excellence, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa.

Helminthologia
|March 5, 2021
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Summary
This summary is machine-generated.

This study identified Xiphinema diffusum, a plant-parasitic nematode, in Pakistan for the first time. Morphological and molecular analyses confirmed its presence, aiding in understanding nematode distribution.

Keywords:
New recordPrunus persicaX. diffusumXiphinema americanum group

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Area of Science:

  • Nematology
  • Plant Pathology
  • Molecular Phylogenetics

Background:

  • Plant-parasitic nematodes pose significant threats to agriculture globally.
  • The Xiphinema americanum species group is known for its widespread distribution and economic impact on crops.
  • Limited information exists on nematode fauna in the Gilgit-Baltistan region of Pakistan.

Purpose of the Study:

  • To identify and characterize plant-parasitic nematodes associated with peach roots in Gilgit-Baltistan, Pakistan.
  • To determine the species of the Xiphinema americanum group found.
  • To provide molecular and morphological data for future taxonomic and phylogenetic studies.

Main Methods:

  • Soil samples were collected from the rhizosphere of peach (Prunus persica) trees.
  • Morphological analysis and morphometrics were conducted on isolated nematodes.
  • Molecular analysis involved sequencing of the 18S ribosomal DNA (rDNA) gene.
  • Phylogenetic analysis was performed using obtained rDNA sequences.

Main Results:

  • A population belonging to the Xiphinema americanum species group was detected.
  • Morphological and morphometric data identified the species as Xiphinema diffusum.
  • Molecular analysis of 18S rDNA showed 99% similarity to Chinese and Australian X. diffusum populations.
  • Phylogenetic analysis confirmed the Pakistani population's close relationship to other X. diffusum lineages.

Conclusions:

  • Xiphinema diffusum is reported for the first time in Pakistan.
  • The findings contribute to the understanding of nematode distribution in the region.
  • This report highlights the importance of continued surveys for plant-parasitic nematodes in Pakistan's agricultural areas.