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<blockquote data-quote="Larry Sansom" data-source="post: 32857" data-attributes="member: 332"><p><strong>Suggest you get Jim Lent's book- The basis of Linebreeding- contact him at <a href="mailto:jhlents@sirinet.net">jhlents@sirinet.net</a> The "rule" is to not have over 50% of any one animal in the pedigree - Example 50% sire- 50%Dam, the next generation the 4 animals are adding 25% each to the equation, then 12 1/2% .... Just add up the % each has and and you will see that an example of half brother to half sister mating is fine - and has been the success of many of the great bulls of most breeds - good example of this is EXT in the Angus. When the % goes over 50% - you can start to see problems. Line breeding is great - but it will bring out the problems as well as the goodness - so culling is Mandatory!! Jim's book starts out with a biblical example - really got my eyes opened after reading that book.</strong></p></blockquote><p></p>
[QUOTE="Larry Sansom, post: 32857, member: 332"] [b]Suggest you get Jim Lent's book- The basis of Linebreeding- contact him at [email=jhlents@sirinet.net]jhlents@sirinet.net[/email] The "rule" is to not have over 50% of any one animal in the pedigree - Example 50% sire- 50%Dam, the next generation the 4 animals are adding 25% each to the equation, then 12 1/2% .... Just add up the % each has and and you will see that an example of half brother to half sister mating is fine - and has been the success of many of the great bulls of most breeds - good example of this is EXT in the Angus. When the % goes over 50% - you can start to see problems. Line breeding is great - but it will bring out the problems as well as the goodness - so culling is Mandatory!! Jim's book starts out with a biblical example - really got my eyes opened after reading that book.[/b] [/QUOTE]
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