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marbling epds versus IMF ultrasounds
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<blockquote data-quote="dph" data-source="post: 146757" data-attributes="member: 2112"><p>Kind of related to Mike's original post about marbling, pre Angus debate.</p><p></p><p>I am hearing more about our breeder and their thoughts on IMF ultrasounding vs marbling epds. Seems that they ultrasounded some of their steers and once killed they found a very poor correlation between their IMF ultrasounds and what ended up on the rail. They used two differnet technicians, both very well versed in ultrasounding. One, used by many breeders, and one out of Iowa State University. The first accurately predicted end marbling 35-40% of the time, the last got it right just under 50%. They have long been skeptical about the IMF ultrasound truly measuring what is later viewed as marbling.</p><p></p><p>What's anyone else's thoughts about this? Do you use marbling epds or ultrasound info? Have other breeders had similar complaints in other breeds? etc.</p><p></p><p>They are well known for getting info back on their own steers. And have suggested for awhile that more faith be given to marbling epds, which they feel are more accurate. To my knowledge they have never debated the validity of ribeye and fat ultrasounds. I often wonder about the wide descrepancy between ultrasound IMF and marbling EPDs for many bulls. </p><p></p><p>Perhaps, with advances in gene testing, this discussion will become academic as we may soon have the introduction of gene based EPDs.</p></blockquote><p></p>
[QUOTE="dph, post: 146757, member: 2112"] Kind of related to Mike's original post about marbling, pre Angus debate. I am hearing more about our breeder and their thoughts on IMF ultrasounding vs marbling epds. Seems that they ultrasounded some of their steers and once killed they found a very poor correlation between their IMF ultrasounds and what ended up on the rail. They used two differnet technicians, both very well versed in ultrasounding. One, used by many breeders, and one out of Iowa State University. The first accurately predicted end marbling 35-40% of the time, the last got it right just under 50%. They have long been skeptical about the IMF ultrasound truly measuring what is later viewed as marbling. What's anyone else's thoughts about this? Do you use marbling epds or ultrasound info? Have other breeders had similar complaints in other breeds? etc. They are well known for getting info back on their own steers. And have suggested for awhile that more faith be given to marbling epds, which they feel are more accurate. To my knowledge they have never debated the validity of ribeye and fat ultrasounds. I often wonder about the wide descrepancy between ultrasound IMF and marbling EPDs for many bulls. Perhaps, with advances in gene testing, this discussion will become academic as we may soon have the introduction of gene based EPDs. [/QUOTE]
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