New Day Daughter

[inyati13]

This is a heifer I purchased this week. Her Sire is New Day 454 (DDC). Thanks to Oldtimer for the list of DD Sires. Since she only has 4 appendages, she is not homozygous positive (aa) for DD. :lol: But she is either heterozygous positive (Aa) or homozygous negative (AA) where the little "a" is the gene for DD and the big "A" is a normal gene. I don't have her registration so I don't remember her Dam. There is a 25% chance this heifer is a carrier (Aa) if her Dam is DDF. If her Dam is DDC as it is known her Sire is, there is a 50% chance she is a carrier. I will probably have her tested but the risk for me can be managed to be "no effect" if I use DDF Sires on her.

This 10 month old heifer is a percentage simangus, it was 50/50. I would estimate her at 850 to 900 pounds.

 

[redcowsrule33]

Go back and do your Punnett squares again inyati, if her sire is a carrier and her dam is free there is a 50% chance she is a carrier.

C c
C CC Cc

C CC Cc


Nice heifer though.

 

[glacierridge]

She looks like a show calf Ron, you thinking of going to a few shows? ;-)
Looks like she's pretty sharp.
I'm surprised you got her without any white on her face.
She's nice tho.

 

[inyati13]

Cc x CC
Genotypes
CC 25%
CC 25%
cC 25 %
cC 25%

Red you are correct 50 % cC carriers
Thanks

 

[inyati13]

She looks like a show calf Ron, you thinking of going to a few shows? ;-)
Looks like she's pretty sharp.
I'm surprised you got her without any white on her face.
She's nice tho.

Thanks Anne. No shows. She just was a little better than those with white, I did get a white one also

 

[gizmom]

Very nice heifer, we have used a ton of New Day 8005 and have been extremely pleased with the progeny. That heifer is worth the price of the test and will most likely be clean (think positive). I have eight eggs in recips out of 8005 (DDF) and our donor A47 (potential carrier). I have already submitted for the test and am thinking very positive thoughts. You are exactly right this is a manageable defect, but our policy is to test and eliminate carriers. I am not saying it is wrong to manage around the defects everyone will have to deal with this new development as they see fit. I am just saying for us the decision is to test and eliminate, when I talk to a customer I want to be able to say that are cattle are tested and clean of any known defects.

Gizmom

 

[inyati13]

Very nice heifer, we have used a ton of New Day 8005 and have been extremely pleased with the progeny. That heifer is worth the price of the test and will most likely be clean (think positive). I have eight eggs in recips out of 8005 (DDF) and our donor A47 (potential carrier). I have already submitted for the test and am thinking very positive thoughts. You are exactly right this is a manageable defect, but our policy is to test and eliminate carriers. I am not saying it is wrong to manage around the defects everyone will have to deal with this new development as they see fit. I am just saying for us the decision is to test and eliminate, when I talk to a customer I want to be able to say that are cattle are tested and clean of any known defects.

Gizmom

Thank you. I do plan to test her. Who is performing the DD tests?

 

[ousoonerfan22]

That's a nice heifer!

 

[TennesseeTuxedo]

So if her dam is a known carrier does that make her a 75% carrier or 100% carrier?

 

[glacierridge]

Get the other one up Ron!!!
We wanna see that one too

 

[inyati13]

So if her dam is a known carrier does that make her a 75% carrier or 100% carrier?

Tux, they are either a carrier or non carrier. It is like pregnacy, one is either pregnant or not. :lol:
This is the probability of what is going to show up in each calf that is born. It is only probability. It is like flipping a coin. It is a 50 % chance of being heads each time you flip, but it is possible that you could flip heads 50 times in a row but not probable. If the Dam was a carrier, there is still a 50% probability that an off-sping will be a carrier, here is how the two crosses produce genotypes on a probability basis:

Cc x CC (a carrier crossed with a non-carrier)
50 % probablity of CC non-carrier or DDF
50 % probabilty of Cc carrier or DDC

Cc x Cc ( a cross of both carriers)
25 % probability of CC non-carrier or DDF
50 % probability of carrier of DDC
25 % probability of exhibiting the defect of having an extra set of legs (cc)

This means nothing in terms of this heifer; she is what she is and the only way to tell is with a test.
Don't be embarrassed to say you don't understand and we can take another run at it. This is fundamental but the essence of how inheritance works.

As you can see the defect only shows in the phenotype when two carriers are crossed.

 

[wbvs58]

Lovely heifer Ron, I see no need to test her other than for your own curiosity. You are not a seedstock producer, it is the job of seedstock producers to test and drift away from carriers and supply clean bulls.
The genetics that carry this gene have been heavily used for over 20 years with no perceived problems until just the other day. If it is much of a problem then I think we are a bit slow on the uptake.
By the way Ron they are now finding normal animals that are homozygous cc. It is only an assumption that the majority of cc embryos die. I think it is more likely that the developing embryo corrects the defect and hence now the normal homozygous cc are showing up.
Ken

 

[inyati13]

Get the other one up Ron!!!
We wanna see that one too

 

[inyati13]

Lovely heifer Ron, I see no need to test her other than for your own curiosity. You are not a seedstock producer, it is the job of seedstock producers to test and drift away from carriers and supply clean bulls.
The genetics that carry this gene have been heavily used for over 20 years with no perceived problems until just the other day. If it is much of a problem then I think we are a bit slow on the uptake.
By the way Ron they are now finding normal animals that are homozygous cc. It is only an assumption that the majority of cc embryos die. I think it is more likely that the developing embryo corrects the defect and hence now the normal homozygous cc are showing up.
Ken

Ken, I agree. I may do it just on the chance I AI her to a bull and she has a spectacular off-spring and I get the wild idea to sell it for a little extra.
If there are homozygous positives not showing the defect, you might be correct that during tissue differeniation that the defect is being corrected or it could suggest that the genetic mechanism is a more complex than simple recessive inheritance!

 

[glacierridge]

They both look so showy Ron, cute!!
What is the second one's side view like?
Love those white splashes on the white face, gives her character.
Have names yet?

 

[inyati13]

They both look so showy Ron, cute!!
What is the second one's side view like?
Love those white splashes on the white face, gives her character.
Have names yet?

I am going to call them New Day and White Socks. The one with white, has white on each of her legs.
I will get better pics when they settle down a little more. Still a little stressed.

 

[gizmom]

Both are nice heifers but I like the black the best (go figure right) So far we are only testing four head and I did that through AGI and my Angus log in here is the link from the Angus press release on the test. Again your absolutely correct you can breed around this condition, but as purebred breeders I think it is our responsibility to test for known defects.
http://www.angus.org/pub/newsroom/releases/082813_DDtest_GeneSeek.html We have some others that will need to be tested but they are heavy bred at this point and I see no reason to rush them through a chute for a blood test. The four I am having tested already have DNA on file at the association.

Gizmom

 

[bse]

Zoetis formally Pfizer is doing the tests im not sure if AGI will do the test on SimAngus this link may have what you need. https://online.zoetis.com/US/EN/Product ... etics.aspx

 

[inyati13]

Gizmom, when you see them together, the difference between them is monumental. In fact, I was the first person who has picked from the lot these two came out of. I have no doubt she would have been gone if someone else had looked before me. New Days is 30 % more heifer in the places you want her to be.

Thanks for the link. Did you see bse's comment? Both of these are SimAngus.

bse, thanks. As soon as I get my tax exempt status from TN revenue, I will be down your way.

 

[Ohrmundt Simmentals]

Nice looking girls. Could be the pics but I like the first one a little better.