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Piedmontese cross heifer
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<blockquote data-quote="WalnutCrest" data-source="post: 1363608" data-attributes="member: 21715"><p>Not all myostatin mutations are the same. Igenity tests for nine different types. </p><p></p><p>There are three different mutations that give the combination of traits described above - each of these mutations are described by Igenity as being missence variations. In addition to the type common to Piedmontese cattle, a different type (called the F94L mutation) is common to Limousin and Aubrac cattle. I don't recall off the top of my head the name of the Piedmontese variation or the name of the third missence variation. </p><p></p><p>The other six are considered disruptive variations and can greatly affect calving ease. </p><p></p><p>Generally, missence variation cattle have twice as many muscle fibers, each of which is long with a narrow diameter ... and ... disruptive variations have the same number of muscle fibers as regular cattle, just they are twice as thick (making the beef tougher).</p><p></p><p>Generally, cattle with two copies of a disruptive variation are consider "double muscled", as it's a the effects of harder calving and tougher beef are not desired. </p><p></p><p>One of our clients runs a fullblood Aubrac bull on Aubrac and Piedmontese cows.</p></blockquote><p></p>
[QUOTE="WalnutCrest, post: 1363608, member: 21715"] Not all myostatin mutations are the same. Igenity tests for nine different types. There are three different mutations that give the combination of traits described above - each of these mutations are described by Igenity as being missence variations. In addition to the type common to Piedmontese cattle, a different type (called the F94L mutation) is common to Limousin and Aubrac cattle. I don't recall off the top of my head the name of the Piedmontese variation or the name of the third missence variation. The other six are considered disruptive variations and can greatly affect calving ease. Generally, missence variation cattle have twice as many muscle fibers, each of which is long with a narrow diameter ... and ... disruptive variations have the same number of muscle fibers as regular cattle, just they are twice as thick (making the beef tougher). Generally, cattle with two copies of a disruptive variation are consider "double muscled", as it's a the effects of harder calving and tougher beef are not desired. One of our clients runs a fullblood Aubrac bull on Aubrac and Piedmontese cows. [/QUOTE]
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