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TAMU - DNA Genotype Testing

New Pricing and New Test Forms and Procedures for Dr. Cothran's Texas A&M Lab

Below is a chart to show new pricing and possible test bundles for reduced rates.
There are also three new forms and new procedures for sending your testing samples and packets.

Please download the new testing forms and instructions
Instructions for use of these form
Testing Form 2 Testing Form 3 Testing Form 4

One form will be used for ALL the tests you wish to have done at the lab.
You may download the three forms, fill out the requested information and mail with sample including a check made payable to the ADCA and send directly to the A&M lab for processing!

Dr. E. Gus Cothran

Dr. E. Gus Cothran Lab, CVM, VIBS
Texas A&M University
Animal Genetics Lab
VBEC Receiving – VICI Rm 126
4458 TAMU
College Station, TX 77843 – 4458

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Click To Download Testing Forms

This is a sample form to show test combinations that can be bundled for a reduced cost. DNA Genotyping /Parentage and A2 Testing are set prices and may not be bundled with other tests for a reduced rate. The bundled tests must be run on the same animal/hair sample. You may not combine tests from different animals.

These labs can be used, but with the genotype the test results must be sent to Texas A&M lab to be entered into the ADCA database. At present, A&M does accept results from UC Davis, but the owner must request that the Davis lab send the results directly to the A&M lab. There will be a $5 fee from A&M (payable to ADCA) for the transfer of information to our database.

Now it is time to acquire the hair samples used for the DNA testing.

DNA material is contained in the root bulbs (follicles) of the hairs. Make sure to PULL out the
hairs in order to include the follicles. Do NOT cut the hair off of the animal or you won’t have
the follicle needed for testing.


  1. Use a separate paper envelope or resealable plastic baggie for each animal’s sample.
    Before collecting the samples, label each bag with the complete name of the animal.
    There is a form for this that will be included in your downloaded information. Fill out
    this form completely and attach it to your hair sample envelope or baggie. If, for
    some reason, your sample gets detached from your form at the lab, then this complete
    identification will enable the folks at the lab to know the identity of the hair sample.
  2. Thoroughly wash your hands and the scissors, pliers, hemostat, etc., that you will be
    using to pull the hairs. Have a roll of paper towels ready near your sample bags or
  3. Use clean (no manure) coarse hairs from the switch at the end of the tail for your
    sample. Pull hairs from the switch using a sharp, jerking motion (using sterilized pliers
    or a hemostat) and make sure that the root bulbs or follicles are attached to most of
    them. It is best to pull about 10-15 hairs at a time, so you will need several pulls to
    obtain the 30-50 hairs required for a sample. It is often easier to twist the hairs around
    your tool before you jerk the hairs out as it seems to keep them from slipping through
    and gives you a better hold on them for pulling. Collect them on a clean paper towel –
    aligning the root ends as you lay them down.
  4. Using scotch tape, tape the hairs into a bundle – about 4 inches from the root ends.
    Then, using your clean scissors, trim the excess ends off and dispose of them – being
    sure to keep the bundle that includes the root ends.
  5. Place the bundle of root ends/hairs into your envelope, gently press out most of the
    air, and seal the bag.
  6. Clean your hands and the instruments before taking the next sample and before each
    successive sample. You can use rubbing alcohol or antibacterial handwash for this
    sterilization process. The goal is to keep each animal’s DNA sample untainted by
    another animals or by your DNA. It is MOST important that you not touch the actual
    root bulbs or follicles as this is the target area for the lab to extract the DNA.


Dr. E. Gus Cothran Lab, CVM, VIBS
Texas A&M University
Animal Genetics Lab
VBEC Receiving – VICI Rm 126
4458 TAMU
College Station, TX 77843 – 4458

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