ABSTRACT:  The objective of the study was to determine if a phenotypic relationship exists between pulmonary arterial pressure (PAP) scores and traits used to evaluate feed utilization. We hypothesized there is no evidence that there is a phenotypic correlation between PAP scores and other traits related to feed efficiency. The data included 193 Angus steers sampled for PAP at high elevation and then moved to a lower elevation feedlot where feed intake data was collected. Pearson’s correlations between PAP and metabolic mid weight, rib eye area, back fat, average daily intake, and average daily gain were 0.04, -0.004, 0.12,-0.08, and 0.06, but were not significant. We concluded that selection based on PAP scores will not affect feed utilization indicator traits.                                                                       

Ryan J Boldt, Miranda M Culbertson, Natalie F Berge, Milton G Thomas, Timothy N Holt, Scott E Speidel, Richard Mark Enns

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Selection for harsh environments and management of animal genetic resources, , 031, 2014
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