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Towards Pathogen-Free Coconut Germplasm Exchange.

Chongxi Yang1, Van Anh Nguyen2, Naga Prafulla Chandrika Nulu1

  • 1School of Agriculture and Food Sustainability, The University of Queensland, Gatton, QLD 4343, Australia.

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Exchanging coconut germplasm in vitro is efficient but risks spreading pathogens. This review covers disease agents, tissues, detection methods, and proposes guidelines for safe coconut germplasm exchange.

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Area of Science:

  • Agricultural Science
  • Plant Pathology
  • Biotechnology

Background:

  • Coconut (Cocos nucifera L.) is vital for global industries and farmer livelihoods.
  • International germplasm exchange aids conservation and distribution but faces biosecurity challenges.
  • In vitro systems offer efficient germplasm exchange but can transmit lethal pathogens.

Purpose of the Study:

  • To review major coconut pathogens and transmission risks associated with in vitro germplasm exchange.
  • To discuss suitable tissues for exchange and available pathogen detection/elimination techniques.
  • To highlight the need for science-backed guidelines for safe, biosecure in vitro coconut material movement.

Main Methods:

  • Literature review of disease agents affecting coconut germplasm.
  • Analysis of various coconut tissues used in in vitro culture for exchange.
  • Evaluation of current techniques for pathogen detection and elimination in vitro systems.

Main Results:

  • Identified key disease-causing agents and their potential transmission via in vitro coconut systems.
  • Assessed the suitability of different explant types for germplasm exchange.
  • Highlighted limitations in current pathogen detection and elimination protocols.
  • Noted the absence of clear, evidence-based guidelines for safe exchange.

Conclusions:

  • In vitro coconut germplasm exchange requires stringent biosecurity measures to prevent pathogen spread.
  • Standardized protocols for pathogen detection and elimination are crucial.
  • Development of science-backed guidelines is essential for ensuring safe international movement of coconut genetic resources.