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Genebank Conservation of Germplasm Collected from Wild Species

  • Christina WaltersEmail author
  • Christopher M. Richards
  • Gayle M. Volk
Chapter

Abstract

Crop genebanks are tasked with maintaining genetic resources that support agriculture. They must keep a diverse array of samples alive for decades to centuries. Controlled conditions within the genebank are necessary to maintain quality and ensure consistency of the sample through time. Challenges for providing quality and consistency increase with samples that are mostly unstudied and highly heterogeneous and respond in unpredicted ways, as is the case for samples collected from the wild. The task of genebanking will be facilitated by better definitions of the “conservation target,” meaning the level of diversity that the sample is intended to represent. With that definition, collectors will have better knowledge of what and where to collect – and when to stop – and “fit-for-purpose” samples will be preserved. Major uncertainties persist about the life expectancy of the sample and whether genebanking imposes genetic shifts. Standards have been recommended by the international community to ensure lasting quality of samples despite a large number of unknowns. We believe some of these standards will be counter-productive or unobtainable for wild-collected samples, and we have offered alternatives that stress documentation so future genebank users can predict whether a sample will suit their needs.

Keywords

Conservation target Cryopreservation Germplasm Longevity Preservation Propagule Sampling Storage Ex situ conservation Genebank 

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Copyright information

© This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2018

Authors and Affiliations

  • Christina Walters
    • 1
    Email author
  • Christopher M. Richards
    • 1
  • Gayle M. Volk
    • 1
  1. 1.USDA, Agricultural Research Service, Center for Agricultural Resources Research, National Laboratory for Genetic Resource PreservationFort CollinsUSA

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