Menu
Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Forums
Cattle Boards
Breeds Board
Understanding Ultrasound data EPD
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support CattleToday:
Message
<blockquote data-quote="DOC HARRIS" data-source="post: 869718" data-attributes="member: 1683"><p>thommoos-</p><p></p><p>In spite of how many informed breeders profess to understand EPD's, how they work, and how specific the readings may be, the fact is - understanding <strong><em>how</em></strong> the prediction of one's future progeny's <em>genetics</em> will perform in a particular herd is extremely difficult - <strong>at best!</strong>, :bang: so don't feel that you are alone in this very tough determination!</p><p></p><p>The very definition of "Expected Progeny Differences" explains the difficulty involved in understanding the subject. It is "..the prediction of how future progeny of each animal are <em>expected</em> to perform <strong><em>RELATIVE TO THE PROGENY OF OTHER ANIMALS LISTED IN THE DATA BASE.</em></strong> (special accent my own). The operative phrase here is "relative to OTHER animals" in the data base! This is a sticking point in the minds of most breeders when they are analyzing animals to balance their herd genetics using traits and characteristics of an individual. They have a tendency to overlook the fact that the EPD's are a compilation of data encompassing an entire <strong><em>breed!</em></strong> That fact, if kept in mind, can justify the ultimate acceptance of EPD's as a reliable template by which to compare one's own animals to the data base. <strong>Accuracy</strong> (ACC) is the reliability that can be placed on the EPD. I feel that in many instances the "Accuracy" factor is ignored by many breeders. Understanding that we are dealing with BILLIONS of sperm with individual dominant and recessive genes, it is a miracle that we can come as close to reliability as we do! </p><p></p><p>Focusing on your questions here, understanding the "ultrasound scan" of IMF EPD throws another "variable" into the formula mix! The U/S technician is human, and interpretation variances rear their heads in any determining final reading.</p><p></p><p>I wrote the above to comment on this: "Livestock evaluation and EPD's have finally evolved to include the use of DNA as the most accurate, dependable information to predict the actual merit for quality and production of an individual. Today these are known as genomic-enhanced, or GE-EPDs." (Pfizer Animal Health source).</p><p></p><p>The study and understanding of DNA Marker Technology will help to solidify in one's mind how to make use of the information that is surrounding us these days. It really places the responsibility of learning on all of us. </p><p></p><p>thommoos, I wish that I had a more concrete answer and instant reply to your query, but a lot of this stuff is above my conception level, and every day something is added to confuse the brain a little more! Perhaps someone on the Forum can enlighten you more easily than I have been able to do. Hang in there! This is a tough subject to get under control for most people.</p><p></p><p>DOC HARRIS</p></blockquote><p></p>
[QUOTE="DOC HARRIS, post: 869718, member: 1683"] thommoos- In spite of how many informed breeders profess to understand EPD's, how they work, and how specific the readings may be, the fact is - understanding [b][i]how[/i][/b] the prediction of one's future progeny's [i]genetics[/i] will perform in a particular herd is extremely difficult - [b]at best![/b], :bang: so don't feel that you are alone in this very tough determination! The very definition of "Expected Progeny Differences" explains the difficulty involved in understanding the subject. It is "..the prediction of how future progeny of each animal are [i]expected[/i] to perform [b][i]RELATIVE TO THE PROGENY OF OTHER ANIMALS LISTED IN THE DATA BASE.[/i][/b] (special accent my own). The operative phrase here is "relative to OTHER animals" in the data base! This is a sticking point in the minds of most breeders when they are analyzing animals to balance their herd genetics using traits and characteristics of an individual. They have a tendency to overlook the fact that the EPD's are a compilation of data encompassing an entire [b][i]breed![/i][/b] That fact, if kept in mind, can justify the ultimate acceptance of EPD's as a reliable template by which to compare one's own animals to the data base. [b]Accuracy[/b] (ACC) is the reliability that can be placed on the EPD. I feel that in many instances the "Accuracy" factor is ignored by many breeders. Understanding that we are dealing with BILLIONS of sperm with individual dominant and recessive genes, it is a miracle that we can come as close to reliability as we do! Focusing on your questions here, understanding the "ultrasound scan" of IMF EPD throws another "variable" into the formula mix! The U/S technician is human, and interpretation variances rear their heads in any determining final reading. I wrote the above to comment on this: "Livestock evaluation and EPD's have finally evolved to include the use of DNA as the most accurate, dependable information to predict the actual merit for quality and production of an individual. Today these are known as genomic-enhanced, or GE-EPDs." (Pfizer Animal Health source). The study and understanding of DNA Marker Technology will help to solidify in one's mind how to make use of the information that is surrounding us these days. It really places the responsibility of learning on all of us. thommoos, I wish that I had a more concrete answer and instant reply to your query, but a lot of this stuff is above my conception level, and every day something is added to confuse the brain a little more! Perhaps someone on the Forum can enlighten you more easily than I have been able to do. Hang in there! This is a tough subject to get under control for most people. DOC HARRIS [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Breeds Board
Understanding Ultrasound data EPD
Top