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Ribeye Area: Difference between revisions
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clicking on the Create button or redlink and reload the page | clicking on the Create button or redlink and reload the page | ||
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[[Category:Carcass Traits]] | |||
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Place brief trait definition/description here | Place brief trait definition/description here | ||
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<!-- Describe ways the phenotype is collected | <!-- Describe ways the phenotype is collected | ||
E.g., for birth weight discuss digital scale, mechanical scale, hoof tape, etc. | E.g., for birth weight discuss digital scale, mechanical scale, hoof tape, etc. | ||
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Ribeye area is an indicator of muscling. The longissimus or ribeye muscle is measured at the 12th rib by using a grid or a ribeye tracing that is measured with a compensating polar planimeter or image | Ribeye area is an indicator of muscling. The longissimus or ribeye muscle is measured at the 12th rib by using a grid or a ribeye tracing that is measured with a compensating polar planimeter or an image-analysis system. | ||
===Adjusted Value=== | ===Adjusted Value=== | ||
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If the trait is not adjusted (e.g. Stayability) then say so | If the trait is not adjusted (e.g. Stayability) then say so | ||
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=== | Ribeye area is adjusted to an age-constant basis. | ||
===Contemporary Group=== | |||
<!-- Discuss how contemporary groups are formed --> | <!-- Discuss how contemporary groups are formed --> | ||
A contemporary test group is a set of cattle of the same sex that have been raised together and have received equal treatment up to the point of slaughter. All progeny within a contemporary group should ideally be born within a 90-day period, and male calves must be castrated. A contemporary group up to the time of weaning will be subdivided if some cattle go on feed as calves and others are started on feed as yearlings, and if the cattle are then split into two or more slaughter groups. Birth date, identification of sire and dam, breed of dam (or breed proportions in crossbred dams) should be recorded for all individuals. | |||
===Genetic Evaluation=== | ===Genetic Evaluation=== | ||
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E.g., direct, maternal, permanent environment due to dam. | E.g., direct, maternal, permanent environment due to dam. | ||
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Ribeye area is generally included in a multiple-trait model with traits such as ultrasound ribeye area and carcass weight. An early growth trait (e.g., birth or weaning weight) may also be included to account for sequential culling if the genetic covariance is sufficient. Direct effects only are fitted. | |||
===Usage=== | ===Usage=== | ||
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Discuss in what circumstances the trait is an ERT or an indicator trait and how the trait should be used and not used. | Discuss in what circumstances the trait is an ERT or an indicator trait and how the trait should be used and not used. | ||
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Ribeye area contributes to the yield grade equation, but to a lesser degree than does back fat thickness. It is not an economically relevant trait but is an indicator of muscle and an indicator of the economically relevant trait which is yield grade. | |||
Latest revision as of 13:51, 13 April 2021
Ribeye area is an indicator of muscling. The longissimus or ribeye muscle is measured at the 12th rib by using a grid or a ribeye tracing that is measured with a compensating polar planimeter or an image-analysis system.
Adjusted Value
Ribeye area is adjusted to an age-constant basis.
Contemporary Group
A contemporary test group is a set of cattle of the same sex that have been raised together and have received equal treatment up to the point of slaughter. All progeny within a contemporary group should ideally be born within a 90-day period, and male calves must be castrated. A contemporary group up to the time of weaning will be subdivided if some cattle go on feed as calves and others are started on feed as yearlings, and if the cattle are then split into two or more slaughter groups. Birth date, identification of sire and dam, breed of dam (or breed proportions in crossbred dams) should be recorded for all individuals.
Genetic Evaluation
Ribeye area is generally included in a multiple-trait model with traits such as ultrasound ribeye area and carcass weight. An early growth trait (e.g., birth or weaning weight) may also be included to account for sequential culling if the genetic covariance is sufficient. Direct effects only are fitted.
Usage
Ribeye area contributes to the yield grade equation, but to a lesser degree than does back fat thickness. It is not an economically relevant trait but is an indicator of muscle and an indicator of the economically relevant trait which is yield grade.
