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Related Experiment Video

Updated: Mar 3, 2026

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Molecular diagnostic development for begomovirus-betasatellite complexes undergoing diversification: A case study.

Judith K Brown1, Muhammad Zia Ur-Rehman2, Sofia Avelar1

  • 1School of Plant Sciences, University of Arizona, Tucson, AZ 85721, USA.

Virus Research
|April 26, 2017
PubMed
Summary

New polymerase chain reaction (PCR) primers detect Cotton leaf curl virus strains, crucial for preventing the spread of damaging plant diseases in cotton and vegetable crops globally. This aids in molecular diagnostics for safeguarding agriculture.

Keywords:
Emergent plant virusesGeminiviridaeGenomic surveillanceNext-generation sequencingPolymerase chain reaction

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Area of Science:

  • Plant Virology
  • Molecular Diagnostics
  • Agricultural Entomology

Background:

  • Begomoviruses causing cotton leaf curl disease are a growing threat in Asia and Africa, impacting crop yield and quality.
  • Global trade in ornamental plants facilitates the spread of these viruses and their hosts to new regions.
  • Genomic diversification and conserved regions in begomoviruses present challenges for developing specific molecular detection tools.

Purpose of the Study:

  • To design and validate species- and strain-specific polymerase chain reaction (PCR) primers for detecting prevalent begomovirus-betasatellite complexes.
  • To address the challenges posed by genomic diversification and conserved sequences in primer design for cotton leaf curl viruses.
  • To develop molecular diagnostic tools for early detection and prevention of virus spread in agricultural and ornamental plants.

Main Methods:

  • Design and validation of PCR primers targeting specific begomoviral species and betasatellites.
  • Analysis of nucleotide sequences and single nucleotide polymorphisms to understand viral diversification.
  • Testing primer efficacy on cloned viral genomes, betasatellites, and DNA from various plant species.

Main Results:

  • Successfully designed and validated PCR primers capable of detecting representative 'core leaf curl' virus strains, distant relatives, and associated betasatellites.
  • Demonstrated the primers' effectiveness on cloned viral DNA and total DNA from selected plant species.
  • Confirmed the utility of molecular diagnostics for identifying Cotton leaf curl Kokhran virus-Burewala strain and Cotton leaf curl Gezira virus.

Conclusions:

  • The developed PCR primers are effective tools for the molecular detection of key cotton leaf curl viruses and their betasatellites.
  • Implementing these molecular diagnostics in plant import screening can significantly reduce the risk of introducing exotic viral diseases.
  • This research contributes to safeguarding global cotton, vegetable, and ornamental crop production from devastating begomoviral diseases.