Page 22 - Delmont Angus Catalogue ebook

Genetic Defects - LOT 1 DELMONT 4625
Arthrogryposis Multiplex (AM), Neuropathic Born: 29/08/19 ID: 113200194625
Hydrocephalus (NH), Contractural Arachnodactyly (CA)
AM, NH and CA are simple recessive gene defects, caused STERN MCCAW 056
by the presence of a single pair of inherited genes. The S: STERN 117
red gene in Angus cattle is a common example of recessive STERN 13986
inheritance – the gene must be present on both sides of the ATAHUA 724
pedigree for full expression. D: DELMONT 3576
If a carrier sire and a carrier dam are mated, 25% of the DELMONT 2865
progeny will be clear of the defect, 50% will be carriers,
and 25% will be affected. 2021 TRANSTASMAN ANGUS CATTLE EVALUATION EBVs
Dir DTRS GL BW MILK
A DNA test has been developed to identify carrier animals +2.8 +1.4 -6.6 +4.3 +13
so these defects can be eliminated from the breed. 31% 26% 64% 68% 61%
200D 400D 600D MCWt SS DC
After such DNA testing, +46 +81 +101 +88 +2.5 -4.7
you will be given one of two results; 68% 68% 70% 66% 69% 36%
AMF, NHF or CAF = tested free of the gene
AMC, NHC or CAC = tested carriers of the defect. Cwt EMA Rib RUMP RBY IMF
+62 +5.8 -0.7 -0.7 +2.0 -1.1
But, to assist with the identification of carrier animals (prior 64% 61% 67% 63% 63% 61%
to DNA testing) a ‘probability test’ has been developed INDEX NOTES: Used over
- using updated test results and animals’ pedigrees, known stud heifers and cows.
Has been a stand from
as Geneprob. Geneprob will identify ‘at risk’ animals in the SR +$140 AP +$121 HDT +$113 a calf. A lot of style
breed database and assign them a status for AMS, NHS
and CAS as follows;

AMFU, NHFU and/or CAFU
= free by pedigree inference, untested

AMS %, NHS% and/or CAS% = a suspected carrier
(% = level of suspicion) but un-tested.
Requires testing to validate true status.

AMF, NHF and/or CAF = tested free of the defect.
AMC, NHC and/or CAC = tested carrier of the defect.
These GeneProb analysis tests are performed every seven
days.

Genotyping for these mutations should, with 100% PURCHASER...........................................
accuracy, expedite elimination of these genes from the
Angus population. PRICE.....................................................

If you are unsure of any aspect of these genetic defects
please enquire of your bull supplier or ring
the AngusNZ Association