Breeding Terms

[buckaroo_bif]

Can anyone please explain to me the difference between linebreeding and inbreeding? And the advantages and disadvantages of each?
please?
thanks

 

[cowsense]

It's quite simple: when you do it in your own program it's linebreeding................when the neighbour does it it's inbreeding! The ad's and disad's lie in whether it's your herd or your neighbours :lol: :lol:


Sorry Bif ......I just couldn't resist; I'll try to come back later with a more responsible answer!

 

[buckaroo_bif]

:lol: ok

 

[Scotty]

IMO having one sire in a three generation pedegree show up twice would be linebreeding. I saw a heifer sell from a mateing of a 1407 son and daughter at Three Trees. I can't remeber the price but remeber enought to know it was stupidly high. Some will tell you if it works to your advantage it is linebreeding. And when they are all retarded or dead it was inbreeding.


Scotty

 

[buckaroo_bif]

IMO having one sire in a three generation pedegree show up twice would be linebreeding. I saw a heifer sell from a mateing of a 1407 son and daughter at Three Trees. I can't remeber the price but remeber enought to know it was stupidly high. Some will tell you if it works to your advantage it is linebreeding. And when they are all retarded or dead it was inbreeding.


Scotty

:lol2: Ok, so maybe if I just sell the retarded heifers and keep the smart nice looking heifers that will work?

 

[Aero]

in my opinion, linebreeding starts when the Inbreeding Coefficient is over 6.25%; others say 12.5%. the other criteria is that you have an animal that you want to more of in your heard and you concentrate him/her by having him in the pedigree more.

inbreeding can be linebreeding or just breeding close without a plan.

linebreeding is a result of skill and planning, not chance or mistakes.

 

[buckaroo_bif]

Thanks Aero. I was just reading an OSU fact sheet that uses the coefficient of 12.5%.
Are there really great benefits to doing this is what my main question is I guess.?

 

[Aero]

Thanks Aero. I was just reading an OSU fact sheet that uses the coefficient of 12.5%.
Are there really great benefits to doing this is what my main question is I guess.?

i am not a linebreeder so this is just my understanding of it.

the only way i can get it to make sense is to look at it genetically.

imagine you have a bull that is the best bull in the country. he is homozygous for every good gene and has no copies of any bad genes.

if you have a cow that was bred to him once, the calf should have around 1/2 of the good genes that you want and 1/2 of the genes of the cow you bred him to. if you breed the calf to some other bull, you get further away from your ideal animal. if you breed that heifer calf to her sire, you should average out to have 3/4 of the ideal bull's genes and 1/4 of the heifer calf's dam's genes.

this is an extreme case for most people, but the more you have an animal in the pedigree, the more of that animal you should see in the offspring.

there are down sides to it like inbreeding regression and lack of variation to get outliers on the good side, but if a linebreeder knows what he is doing, the animals he produces should be very uniform.

usually linebreeding is only used for seedstock producers. if the calves will be sold for slaughter, there is no benefit.

there is a lot more to this area, but this is a good basic post for it.

if you want more info from real linebreeders, ask angus2 some questions on this board: http://www.5BarX.com

 

[buckaroo_bif]

Thanks Aero, I just didn't know how good a practice it would be to breed a heifer to her sire???
In doing this would you not be just waiting for a wreck to happen?
I was looking at your 5barx board a minute ago.
Thanks

 

[Aero]

In doing this would you not be just waiting for a wreck to happen?

i have asked that question and they tell me that wrecks are much less frequent than many expect.

 

[buckaroo_bif]

I guess just keep your fingers crossed at calving time...! :lol:

 

[buckaroo_bif]

Nother question please, if you do take a heifer and breed to her sire what would be the coefficient factor???
And no I am Not thinking of doing this I am just trying to learn more about it.

 

[Aero]

Nother question please, if you do take a heifer and breed to her sire what would be the coefficient factor???
And no I am Not thinking of doing this I am just trying to learn more about it.

http://www.richill.com/pedigree.htm

25%

 

[buckaroo_bif]

thanks Aero

 

[LonghornRanch]

Almost all the miniature cattle, donkeys and horse are results of linebreeding.

 

[SEC]

There is a book the Gerald Frey wrote, "Basis of Linebreeding". What a book, I think it's awesome, I had to read it quite a few times to get the just of things because it's a lot to think about.

In that book he says something like you don't won't to have more than 25% blood of a sire. I am thinking if you do a sire/ daughter mating it would be like 75% of that blood from one animal.

Sire/daughter mating is what they do when they want to verify a a sire is defect free. I think it's something 50 daughters. I am not sure why you would want to do it in the first place.

But over the course of time we have seen many great bulls that are result of a full brother sister mating.

 

[Aero]

In that book he says something like you don't won't to have more than 25% blood of a sire. I am thinking if you do a sire/ daughter mating it would be like 75% of that blood from one animal.

do you mean you shouldnt have a inbreeding coefficient (IBC) of greater than 25%?

in any mating you have 50% of a sire's blood while the IBC might still be 0%.

 

[SF]

Almost all the miniature cattle, donkeys and horse are results of linebreeding.

Many fullblood cattle are a result of linebreeding. If you go back far enough in the pedigree's you will find many common ancestors.

 

[buckaroo_bif]

here is a link to some books i am ordering the one by Jim Lents.
http://www.bovineengineering.com/books.html
Maybe by this time next year I will know what I am talking about on this subject.
Some things I read earler today said anythng with a factor less than 12.5 is considered linebreeding. Anything more than that it's interbreeding.

 

[SEC]

Yes, that's the guy who wrote the book Jim Lents.

I am going dig it up again and refresh my mind.