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<blockquote data-quote="jnowack" data-source="post: 230087" data-attributes="member: 3954"><p>UG </p><p></p><p>There is a difference between a crossbred/hbrid and a composite. Composites are treated like a breed and are more consistant than crossbreds. Balancers, Lim-Flex, Sim-Angus are crossbreds of varying percentages. Do not lump them in with true composites such as Brangus, Santa Gertrudis, Beefmasters, etc. People like to misuse the term composite. </p><p></p><p>quotes from Harlan Ritchie's paper below</p><p></p><p>What is a composite? A generally accepted definition would be: a population made up of two or more component breeds, designed to retain heterosis (hybrid vigor) in future generations without crossbreeding and <strong>maintained like a pure breed.</strong></p><p></p><p></p><p>What about using crossbred (hybrid) bulls? <strong>Hybrid bulls offer an <u>alternative</u> method of using the composite <u>concept</u>. </strong></p><p><strong></strong></p><p>end quote</p><p></p><p>He did not discuss the consistency of crossbreds and did not lump them in with the composite BREEDS. He did point out the levels of heterosis with different crossbreeding systems. The heterosis level of the 2 and 3 breed rotation is higher than the heterosis level of 2 and 3 breed composite. And the 4 breed compsite still has lower heterosis than a 3 breed rotation.</p><p>The rotational cross is still a simpler system that delivers more heterosis with fewer breeds used. It is easier to select cattle of similar biological type if you don't have to use as many different breeds to attain similar levels of heterosis.</p><p></p><p>thanks</p><p></p><p>jnowack</p></blockquote><p></p>
[QUOTE="jnowack, post: 230087, member: 3954"] UG There is a difference between a crossbred/hbrid and a composite. Composites are treated like a breed and are more consistant than crossbreds. Balancers, Lim-Flex, Sim-Angus are crossbreds of varying percentages. Do not lump them in with true composites such as Brangus, Santa Gertrudis, Beefmasters, etc. People like to misuse the term composite. quotes from Harlan Ritchie's paper below What is a composite? A generally accepted definition would be: a population made up of two or more component breeds, designed to retain heterosis (hybrid vigor) in future generations without crossbreeding and [b]maintained like a pure breed.[/b] What about using crossbred (hybrid) bulls? [b]Hybrid bulls offer an [u]alternative[/u] method of using the composite [u]concept[/u]. [/b] end quote He did not discuss the consistency of crossbreds and did not lump them in with the composite BREEDS. He did point out the levels of heterosis with different crossbreeding systems. The heterosis level of the 2 and 3 breed rotation is higher than the heterosis level of 2 and 3 breed composite. And the 4 breed compsite still has lower heterosis than a 3 breed rotation. The rotational cross is still a simpler system that delivers more heterosis with fewer breeds used. It is easier to select cattle of similar biological type if you don't have to use as many different breeds to attain similar levels of heterosis. thanks jnowack [/QUOTE]
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