Page 113 - NZ Herefords Magazine 2019 Edition

to resample. Because you can’t take hair samples from calves,
the TSUs allow us to DNA much earlier. It’s really simple; at
tagging the calves get a birth ID, visual ID and TSU sample. We
put the samples in the fridge and then after weaning we work
out what has been sold to market and what we’ve kept. These
samples are available to us at any time. TSUs are simple and
much easier for us,” says Colin Corney, Colraine Herefords and
president of the NZ Hereford Association.
The TSU is fully sealed and positively identified with both a 2D
barcode and ID panel. TSUs can be paired to matching NAIT and
visual management tags (TSU Birth Sets), creating an absolute
sample-to-animal linkage. The testing system also now provides
for archiving, important to seedstock producers. Previously, once
unsealed the vial unit was no longer useful. Today, Allflex and
Neogen reseal tissue in the vial for archiving. This enables breed
associations to retest animals as DNA technology advances;
resolve suspected errors in animal ID, pedigree or parentage; and
confirm DNA when animals are sold or transferred.
“WE CHANGED TO WET TSUS FOR EASE ABOVE: Close up shot of a TSU vial.
OF SAMPLING. IT IS MUCH EASIER THAN

HAIR SAMPLES, ESPECIALLY AT DIFFERENT
TIMES OF THE YEAR WHEN THE TAIL CAN
BE COVERED IN MUD AND MUCK.”

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