Cryopreservation of the Lesion Nematode (Pratylenchys spp.)

N. J. Galway, J. Curran


Abstract: Optimal conditions for cryopreserving of populations of root lesion nematode (Pratylenchus spp.) were determined. Nematode survival was achieved using glycerol pre-treatments in the range of 14-17% (w/w). Increasing duration of the incubation in glycerol (up to 5 days) before immersion in liquid nitrogen significantly influenced nematode survival The highest mean survival for P. thornei was 76% after incubation in glycerol for 5 days. Nematodes were able to reproduce and infect carrot disc cultures after cryopreservation. This technique has valuable applications for long-term germplasm storage and maintenance of genetic lines. Key words: cryopreservation, lesion nematode, Pratylenchus.

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