Preservation of seed viability during 25 years of storage under standard genebank conditions

    Research output: Contribution to journalArticleAcademicpeer-review

    36 Citations (Scopus)

    Abstract

    Maintaining sufficient viability is critical to the sustainability of ex situ conserved seed collections. For this reason, accessions are regenerated when viability falls below a predefined threshold. Viability is monitored by determining the germination ability of accessions at predefined time intervals. Optimizing the frequency of these germination tests, in order to avoid waste of resources, is hampered by the scarce availability of data about seed longevity, particularly for material maintained under genebank conditions. Here we report on the analysis of nearly 40,000 germination test results collected for a wide range of crop species over a 25-years period by the centre for genetic resources, the Netherlands (CGN), where seeds of genebank accessions are dried to 3–7 % moisture content and stored for the long term under near-vacuum in aluminium foil bags at -20 °C. The results indicate that seed viability is well maintained for the large majority of seed lots during the first 25 years after regeneration as only 3.3 % of the monitoring tests revealed below-threshold germination values. It is argued that the majority of these sub-standard seed lots are due to other causes than seed ageing, including dormancy problems and estimation error in germination testing. For material, maintained under the seed management procedures and storage conditions practiced by CGN, it is therefore recommended to delay the first germination monitoring tests to 25 years after regeneration.
    Original languageEnglish
    Pages (from-to)1407-1421
    JournalGenetic Resources and Crop Evolution
    Volume60
    Issue number4
    DOIs
    Publication statusPublished - 2013

    Keywords

    • desiccation-tolerance
    • longevity
    • brassicaceae
    • germination
    • maturity

    Fingerprint

    Dive into the research topics of 'Preservation of seed viability during 25 years of storage under standard genebank conditions'. Together they form a unique fingerprint.

    Cite this