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Post by gwenger on Mar 8, 2008 15:45:29 GMT -5
What are your thoughts on breeding a bull and female if they both have the same Sire?
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Post by Sherry on Mar 8, 2008 22:45:39 GMT -5
Well, I guess a lot of it depends on your thoughts of culling. Many farmers have done this to bring out certain traits, but a long with passing good traits, the bad can also become more prevalent. I have seen quite a few father to daughter, or mother to son as supposedly the negatives are less. Also, are the dams related at all? A farmer out on the west coast does this quite often, brother to sister, to breed new "true breeds", such as miniature holsteins, but the cull rate I am sure is quite high.
Sherry
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Post by christinat on Mar 21, 2008 15:51:29 GMT -5
We have been working with bulls that have at lease 5 generations of line breeding and have found only positive results. It is not a recommended practice for the uneducated, but using Jim Lents rule of never go over 50% (ie. brother/ sister) you won't do harm if the cattle have all of the traits you want at that point. We have been practicing line breeding for 8 years now, and have found the calves to be more consistent, the cows to be exceptional, and the bulls produced to be showing less defects. All in all, I'm planning on continuing with it in our program...
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wolffarm
Silver Member
Goofy 31
Posts: 26
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Post by wolffarm on May 10, 2008 20:37:24 GMT -5
I have been doing a lot more line breeding the last 15 years. Still do some outcrossing so I have some to comepare to. Been having real good luck with it. Years ago, after dicussing cattle and breeding practices with a new customer. Afterwards he told me I sounded just like Jim Lents. So soon after that I got acquanted with Jim and I think any of Jim's breeding pactices will work on are breed. Last year, thanks to a old breeder I received a copy of a study done in Europe in the 70's on inbreeding. And they found out that are breed had the highest tolerance for inbreed of all the breeds they tested. They also concluded that are breed would have most positive impact on the commercial industry of all the breeds in the study. I don't remember the number a breeds in the study, but it was a large study.
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Post by colewood on Oct 21, 2008 11:26:07 GMT -5
I realize that the last post in this thread was back in May, but I thought I would just say something that one of my professors and some of my cattle acquaintances have said about line breeding: "When it works, its linebreeding. When it doesn't, its inbreeding." We have commercial cattle in addition to the Whites we have. They were linebred for a while, and then we had a problem with small, non-functional calves. For that reason, we try not to linebreed our Whites. I'm not saying what we do is right, or what everyone else does is wrong; that's just my humble opinion...
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