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Buckeye Profile
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Cowtalk Staff

Registered: 03-2005
Posts: 3979
Karma: 55 (+55/-0)
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Re: Re:


I strongly disagree with the TPI and Net Merit changes.

Also sometime in the future someone will trash the genomic proof bulls from today, when compared to the numbers after the switch. Then you have to point out that they not not only had a base change, the also changed the formulas.

Expect your typical Goldwyn sons to get absolutely hammered with this change.

---
Buckeye seems like a one man wrecking crew out to rid the world of injustice. ----- Mayjay
8/8/2014, 2:04 Link to this post PM via Email   PM via Forum
 
Valiant97 Profile
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EX90

Registered: 12-2013
Posts: 158
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Re: August Proof


I'm pretty ticked off as well. Was there ever a vote, discussion or any such thing about these changes?

It seems like they just wanted to stir things up again just for fun. What's the point in letting a cow milk her self to death in her first lactation....

Farmers need to stand up to crap like this and put their word out, and start discussions on social media ( Facebook )

 If there's one thing I hate its cows not getting pregnant. When they're from the same bull it shows you that DPR is definately heritable ( and important in bull decisions)

The bullvine article also made me wonder. Throw away all your current sires because your old #1 NM bull is now not as high?! Changing your breeding formula just on a formula change makes no sense.

Sorry for the paragraph,
8/8/2014, 3:03 Link to this post PM via Email   PM via Forum
 
bazza20 Profile
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Ex 97 2E

Registered: 07-2009
Posts: 1983
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Re:


Yeah the bullvine article made me laugh. Change your breeding and chase the high production sires as they are likely to fair better on the new index. Don't worry about what works better for your farm or breeding goals.

The new index is going to be the planet index. It will suit his bloodlines well.
8/8/2014, 3:35 Link to this post PM via Email   PM via Forum
 
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VG88

Registered: 03-2011
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Re: August Proof


Is the TPI formula changing in Dec as well as the NM? I've seen articles on the NM change, but nothing on TPI.

Like the previous posts said, stick to your breeding goals, and don't let a change in formula influence you. I will still be concentrating on health traits with type right up there too.

In two years, they may decide to change the formula again, and suddenly you look like a genius. If you are always chasing, it is really hard to get to the front.
8/8/2014, 5:58 Link to this post PM via Email   PM via Forum
 
smous Profile
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Cowtalk Staff

Registered: 11-2003
Location: South Africa
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Re: Re:


quote:

bazza20 wrote:

I think the NM changes are a mistake. Finally make some small improvements in health traits and now they go and put big weightings back on production and take it off health. It's like going back to the 90s.



I agree, one step forward, two steps backwards! :arrh

---
WWS-SA
8/8/2014, 6:34 Link to this post PM via Email   PM via Forum
 
errolston Profile
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Ex 97 2E

Registered: 07-2003
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Re: August Proof


Here are the weightings for the new UK PLI formula from Aug'14:

Production 32.2% - mainly fat + protein, kg + %
Fertility 20.3%
Lifespan 14.4%
Maintenance costs 9.6% - an attempt to adjust for efficiency of cows based on an estimate of body weight. i.e. 2 cows giving the same yield, the larger one will be less efficient
Scc 9.1%
Udder 7.0& - traits most correlated with longevity
Feet & legs 5.5% - locomotion is scored by UK classifiers, this is primary trait in this element
Direct calving ease 1.6%
Maternal calving ease 0.3%

Broadly the change in weightings of production against health traits has moved from 45:55 to 32:68 in favour of health traits. Fertility is one of the elements that has increased the most.

Last edited by errolston, 8/8/2014, 8:38
8/8/2014, 8:37 Link to this post PM via Email   PM via Forum
 
bazza20 Profile
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Ex 97 2E

Registered: 07-2009
Posts: 1983
Karma: 30 (+32/-2)
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Re: August Proof


quote:

errolston wrote:

Here are the weightings for the new UK PLI formula from Aug'14:

Production 32.2% - mainly fat + protein, kg + %
Fertility 20.3%
Lifespan 14.4%
Maintenance costs 9.6% - an attempt to adjust for efficiency of cows based on an estimate of body weight. i.e. 2 cows giving the same yield, the larger one will be less efficient
Scc 9.1%
Udder 7.0& - traits most correlated with longevity
Feet & legs 5.5% - locomotion is scored by UK classifiers, this is primary trait in this element
Direct calving ease 1.6%
Maternal calving ease 0.3%

Broadly the change in weightings of production against health traits has moved from 45:55 to 32:68 in favour of health traits. Fertility is one of the elements that has increased the most.



In my opinion that is much more sensible. I can't work out why they have shifted the NM back the other way.

8/8/2014, 8:41 Link to this post PM via Email   PM via Forum
 
PADairymen Profile
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Ex 97 2E

Registered: 12-2009
Posts: 1676
Karma: 21 (+23/-2)
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Re: August Proof


I question whether the higher milk prices haven't caused the 'desire' to increase the weight of production traits. Also the price of beef may have reduced the value of fertility in the sense that you can cull a cow for ridiculous money and buy a replacement for close to the same therefore making it more profitable to have a high yielding cow than one that breds back. Just a thought.
8/8/2014, 12:53 Link to this post PM via Email   PM via Forum
 
bazza20 Profile
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Ex 97 2E

Registered: 07-2009
Posts: 1983
Karma: 30 (+32/-2)
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Re: August Proof


quote:

PADairymen wrote:

I question whether the higher milk prices haven't caused the 'desire' to increase the weight of production traits. Also the price of beef may have reduced the value of fertility in the sense that you can cull a cow for ridiculous money and buy a replacement for close to the same therefore making it more profitable to have a high yielding cow than one that breds back. Just a thought.



Times of high milk price and high beef price never last. A cow that gets pregnant fast will always be valuable.
8/8/2014, 13:00 Link to this post PM via Email   PM via Forum
 
craethke Profile
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EX95

Registered: 09-2011
Posts: 686
Karma: 29 (+30/-1)
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Re: August Proof


PA Dairyman, it was explained to me that way as well. Before the milk and beef prices too off, the reasoning was to drop the weighting of longevity when replacements could be bought for 1300-1500. The decision to overhaul the formula was made a while ago, and boy was their guess wrong! Leave the formula alone, dairymen and breeders are smart enough to pick through and find their own weightings, geneticists must have been bored and thought they were helping.
8/8/2014, 13:02 Link to this post PM via Email   PM via Forum
 


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