Environmental DNA (eDNA) Sample Shipping Protocol
Alexandria B Boehm, Meghan M. Shea
Abstract
This is a protocol for mailing PCR amplicons generated from eDNA samples, specifically via the following earlier sampling & filtration, extraction, and PCR protocols, e.g.:
Coastal Environmental DNA Sampling & Gravity Filtration Protocol
DNA Extraction Protocol from Sterivex Filters
Environmental DNA (eDNA) COI PCR Amplification and Gel Electrophoresis ProtocolWhile this protocol was designed for mailing to the Georgia Genomics and Bioinformatics Core, the general principles may be relevant to other shipping contexts.
Acknowledgements & Attributions:
Thanks to Bradley B. Tolar for guidance on successful shipping protocols.
Steps
Preparing Samples for Shipping
Clean bench area with 10% bleach, 70% ethanol, and RNase Away
Wipe down 20 µL multichannel pipette and several PCR tube holders with RNase away. Run in UV Crosslinker for 10 minutes on each side.
Wipe down ice bin with 10% bleach, 70% ethanol, and RNase Away, fill with ice, and add PCR products stored in 8-strip PCR tubes
Label all 96-well plates needed for storing samples accordingly
Being careful not to open PCR tubes directly over the 96-well plates, add 15 µL of sample to each well using multichannel pipette, making sure you keep track of the orientation of how the plate was filled
Seal the plates carefully with aluminum adhesive seals
Press around the edges of each well to make sure they are sealed
Parafilm around the edges of each plate
Wrap each plate in Kimwipes to absorb any condensation that occurs during shipping
Cut two pieces of cardboard that fit on either side of each plate; tape the cardboard around each plate to form a sandwich (to keep it from getting punctured while shipping)
Seal each plate in a new Ziploc bag and label accordingly
Bubble wrap around each plate and place in a hard container (cardboard freezer box, pipette tip box, etc.)
Seal hard container with tape and place in its own Ziploc bag; label accordingly
Place bagged box in a Styrofoam cooler that fits in an associated cardboard box and fill with ice packs
Tape Styrofoam cooler closed and secure it in the corresponding cardboard box
Store cardboard box at -20°C until ready to mail