Understanding SNP Poll Test Results
Neogen Australasia moved to SNP based DNA testing in September 2017. The move to SNP based testing means that we now have a far more accurate test for Poll in both taurine and indicine cattle. Previously used Beef CRC based Poll tests would return a result and an accuracy (e.g. Homozygous Polled 98%). With SNP based Poll testing, the Poll gene can now be identified with a lot more accuracy and a description of the specific poll allele found is included as a subscript.
When reporting Poll test results from a SNP based test, the results will be reported as seen below:
Result
Interpretation
Animal's Appearance
PcPc PcPf Pfpf HPC
Homozygous Poll (PP)
Predominately Polled (occasional scurs)
Heterozygous Poll (PH)
Polled or Scurred
HPf HH
Horned (HH)
Horned
Mating outcomes (statistically):
Pc and Pf are interchangeable for 'P' in the graphic below.
P P H PH PH H PH PH P H P PP PH H PH HH H H H HH HH H HH HH
P P P PP PP P PP PP P P P PP PP H PH PH P H H PH HH H PH HH
PPx PP 100% proger will be PP polled
ppx HH 100% propelywilbe PH
PP X PH 50% progeny will be PP polled, 50% will be PH polled
PH x PH 50% progeny will be PH polled, 25% will be PP polled, 25% will be HH horned
PH x HH 50% progeny will be PH polled, 50% will be HH horned
HH * HH 100% progeny will be HI hornea
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