Residual feed intake as selection tool in South African Bonsmara cattle

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dc.contributor.author Steyn, Yvette
dc.contributor.author Van Marle-Koster, Este
dc.contributor.author Theron, Helena E.
dc.date.accessioned 2014-07-08T09:10:58Z
dc.date.available 2014-07-08T09:10:58Z
dc.date.issued 2014-06
dc.description.abstract In South African Bonsmara cattle, feed conversion ratio (FCR) is mostly used as a measure of feed efficiency in selection programs but has the disadvantage of being a ratio trait and unfavourably correlated to weight and mature size. Residual feed intake (RFI) overcomes both these disadvantages. The purpose of this study was to evaluate RFI as a potential trait in a selection programme by determining its correlations with growth related traits as well as other efficiency traits. Data of 5981 Bonsmara bulls that participated in centralised growth tests was analysed. In this study, RFI was calculated within contemporary groups of more than ten animals. The h2 for RFI, FCR and KR were 0.27±0.02, 0.23±0.02 and 0.18±0.02 respectively. The genetic correlation between RFI and FCR, and RFI and KR were 0.65±0.04 and 0.12±0.07 respectively. Correlations approaching zero were estimated between RFI and shoulder height (SH), body length (BL), scrotal circumference (SC), average daily gain (ADG), weaning weight (WW) and metabolic mid-weight (MMW), and a strong correlation of 0.79±0.03 with daily feed intake (DFI). This study shows sufficient genetic variation for RFI to be considered by the Bonsmara breed as a measure of feed efficiency and confirms its independence from growth and size traits. en_US
dc.description.librarian hb2014 en_US
dc.description.uri http://www.elsevier.com/locate/livsci en_US
dc.identifier.citation Steyn, Y, Van Marle-Köster, E & Theron, HE 2014, 'Residual feed intake as selection tool in South African Bonsmara cattle', Livestock Science, vol. 164, no. 3, pp. 35-38. en_US
dc.identifier.issn 1871-1413 (print)
dc.identifier.issn 1878-0490 (online)
dc.identifier.other 10.1016/j.livsci.2014.03.007
dc.identifier.uri http://hdl.handle.net/2263/40630
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2014 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Livestock Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Livestock Science, vol. 164, pp. 35-38, 2014. doi : 10.1016/j.livsci.2014.03.007. en_US
dc.subject Feed efficiency en_US
dc.subject Residual feed intake en_US
dc.subject Feed conversion ratio en_US
dc.subject Kleiber ratio en_US
dc.subject Bonsmara cattle en_US
dc.title Residual feed intake as selection tool in South African Bonsmara cattle en_US
dc.type Postprint Article en_US


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