a2 testing - crv4all.co.nz · individual a2 cow test crv has the ability to analyse herd test milk...
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BETTER COWS | BETTER LIFECRV4ALL.CO.NZ
TESTING OPTIONS
INDIVIDUAL A2 COW TEST
CRV has the ability to analyse Herd Test milk samples for
A1 and A2. This will result in a cow being classified into
one of three categories;
1. A2/A2: This phenotype will result in pure A2 type
beta-casein in the milk.
2. A1/A2: This phenotype will result in an equal amount
of A1 and A2 beta-casein in the milk.
3. A1/A1: This will result in a pure A1 type beta-casein in
the milk.
Farmers who herd record using CRV Insight will have the
A2 cow category automatically updated once the herd
test results have been analysed. The A2 cow category will
be available in standard CRV Insight reporting.
Farmers who don’t herd record with CRV Insight will be
provided with a report showing the A2 cow category for
each cow.
BULK A2 TEST
A bulk A2 test is also available. This test provides a
percentage indicator as to how much A1 and A2 milk is in
the vat that the sample was taken from. You don’t need to
be Herd Testing with CRV to have a bulk test.
Results will be presented for A1 content, and from there
the A2 content is calculated.
A1 content in milk
LABORATORY ID SAMPLE ID A1 CONTENT
Units %Reporting limit 0.5
18-09538-1 FLYL 78833 55.0
A1 Content in Milk Approver:
The A2% will be 45% (100 - 55 = 45)
A2 TESTINGVIA HERD TESTING
BETTER COWS | BETTER LIFECRV4ALL.CO.NZ
ORGANISING A TEST AND PRICING
HOW CAN I GET MY INDIVIDUAL COWS TESTED FOR THE A2 PHENOTYPE?
You can order an individual A2 cow test through your
Herd Tester. If you don’t currently Herd Test with us, we
can arrange this.
The individual A2 cow test is an extension of the standard
TAD or OAD CRV herd testing service. The individual milk
sample will be analysed for the Fat, Protein, Lactose
and SCC and then sent for further analysis of the A1 and
A2 phenotype.
HOW MUCH DOES IT COST?
The individual A2 cow test is in addition to the standard
herd test costs.
An individual A2 cow test costs an additional $27.50 per
animal. A whole herd individual A2 cow test costs an
additional $19.90 per animal. A list of cow numbers will
need to be supplied for Individual cow tests.
< 250 cows $27.50 per cow
> 250 cows or whole herd $19.90 per cow
WHY WOULD I DO A BULK A2 TEST?
By doing a bulk A2 test you will know the percentage of
A1 and A2 milk being produced in your herd. Knowing this
percentage may help you decide to test the individual
cows in your herd.
Bulk A2 testing doesn’t require you to be an existing Herd
Testing client.
A bulk A2 test costs $250.
BREEDING FOR A2
CAN I BREED FOR A2?
Can cows be breed for A2? Yes, they can.
By using A2A2 sires the herd will over time have more
and more A2A2 cows. However, A1 genes are very likely
to persist in the herd, but at a reducing incidence, for
many generations.
See the table below.
IS THERE ANY WAY TO FIND OUT IF A CALF IS A2?
Yes through DNA testing. DNA test your calf to determine
if she has the A2 phenotype. Keeping as many
replacement A2 calf’s will speed up the conversion to a
full A2 herd.
Later this year we will be able to provide DNA tissue
analysis including sire verification and individual gene
testing options and A2.
SIRE A2A2
DAM
A2A2 100% A2A2 Produce 100% A2 milk
A1A250% A2A2
50% A1A2 Produce 50% A2 milk 50% A1 milk
A1A1 100% A1A2