Codon 171 Test Results

I took advantage of an offer from USDA to have my rams genetically tested for scrapie resistance at Codon 171.  An official USDA veterinarian collected blood samples from the five rams I have on my property on 9/9/10.  The results came in the mail 9/24/10. 

Helpful information supplied by Gene Check, Inc:

"Codon 171 is the most commonly tested codon.  It is used to test for susceptibility to Strain C scrapie (the most common form of scrapie in the U.S.)  Result possibilities are QQ, QR, or RR.

QR and RR sheep are resistant to strain C scrapie.

Codon 136 is used to test for susceptibility to Strain A scrapie (recently discovered in the U.S.)  Result possibilities are VV, AV, AA.

Codon 136 [testing] is necessary only on QR and QQ animals.  It is not necessary to test RR animals as they are automatically AA at Codon 136.

Only AA sheep are resistant to Strain A scrapie.

Testing at Codon 154 is generally used only for research purposes."

My flock results

Little Red Oak Ash      QQ

S'more Courante          QR

Boston Lake Clennam  QR

Boston Lake Tecwyn    RR

Boston Lake Beck        RR

I have listed this info with each sheep on the Flock and Sale pages.  Using this information, and that from Kimberwood Kavan's results in 2006 (171: QR  136: AA), I was able to add some knowns to offspring of these rams.  Therefore, some of my ewes also have some partial information.