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Pulmonary arterial pressure in Angus cattle: environmental influences and relationship with growth and carcass traits

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dc.contributor.authorPauling, Rachel, author
dc.contributor.authorEnns, R. Mark, advisor
dc.contributor.authorHolt, Timothy N., committee member
dc.contributor.authorSpeidel, Scott E., committee member
dc.contributor.authorThomas, Milton G., committee member
dc.date.accessioned2017-09-14T16:04:02Z
dc.date.available2017-09-14T16:04:02Z
dc.date.issued2017
dc.description.abstractRight-side heart failure (RHF) resulting from hypoxia induced pulmonary hypertension is most commonly observed in cattle located at high elevations, but has been observed in some feedlot cattle residing at low elevations as well. Beef cattle producers typically use pulmonary arterial pressure (PAP) observations to predict an animal's susceptibility to RHF. The objective of this this study was to investigate the effect of elevation on PAP measures, and to evaluate the relationship between PAP, growth traits, and carcass traits in Angus cattle. The first study utilized PAP and elevation data obtained from the American Angus Association (AAA, n = 4,511), Colorado State University Beef Improvement Center (n = 5,433), and Dr. Timothy Holt DVM (n = 4,821). A univariate analysis of PAP as used to obtain elevation solutions to be input to a polynomial regression to determine high versus low elevation (1,620 m). Then a bi-variate analysis was performed to evaluate the genetic relationship between PAP observations obtained at high elevations as well as low elevations. Results from this study indicate that PAP observations obtained at any elevation can be considered the same trait with a genetic correlation of (0.83 ± 0.15). The second study utilized data obtained from AAA (n = 4,509) which included PAP, growth, and carcass traits. Multivariate analyses of PAP and growth traits, as well as PAP and carcass ultrasound traits were used to obtain estimates of heritability and genetic correlations. Results from these analyses indicated that there are moderate genetic correlations between PAP and maternal birth weight (0.55 ± 0.12) as well as PAP and ultrasound ribeye area (0.24 ± 0.12). These results suggested that selection for increased growth and muscling in cattle could consequently increase PAP observations.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierPAuling_colostate_0053N_14154.pdf
dc.identifier.urihttps://hdl.handle.net/10217/183848
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectelevation
dc.subjectheritability
dc.subjectpulmonary arterial pressure
dc.subjectgenetic correlation
dc.subjectperformance traits
dc.subjectAngus cattle
dc.titlePulmonary arterial pressure in Angus cattle: environmental influences and relationship with growth and carcass traits
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineAnimal Sciences
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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