02362naa a2200265 a 450000100080000000500110000800800410001902200140006002400290007410000170010324501180012026000090023850007650024752007920101265300160180465300150182065300170183565300290185270000130188170000220189470000160191670000190193270000190195177301260197010645072024-03-20       2024    bl uuuu     u00u1 u    #d  a2573-21027 a10.1093/tas/txae0052DOI1 aMARÍN, M.F.  aEnergy efficiency of grazing Hereford heifers classified by paternal residual feed intake.h[electronic resource]  c2024  aArticle history: Received 21 September 2023, Published 14 March 2024. -- Corresponding author: mfedericamarin@gmail.com -- Funding  This research was partially funded by the Comisión Académica de Posgrados (Uruguay) through the graduate scholarship awarded to M.F. Marín and by the CSIC I+D Research Program (UdelaR) awarded to M. Carriquiry, and by the Instituto Nacional de Investigación Agropecuaria (CL_54 - Fenómica y genómica en bovinos de carne). --  Issue Section: Ruminant Nutrition (https://academic.oup.com/tas/search-results?f_TocHeadingTitle=Ruminant+Nutrition) -- License: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/).  aABSTRACT.- Residual feed intake (RFI) has become in a widely spread index of feed efficiency. Although most of beef cattle systems in the world are pasture-based, RFI evaluation and research is usually performed in confinement conditions. In this context, residual heat production (RHP) estimated as the difference between actual and expected heat production (HP), could allow to identify efficient animals. Thus, the aim of this work was to evaluate the relationship between paternal estimated breeding values (EBV) for RFI and beef heifer efficiency, measured as RHP, as well as its association with heifers' productive and reproductive performance on grazing conditions.  © The Author(s) 2024. Published by Oxford University Press on behalf of the American Society of Animal Science.  aBeef cattle  aRangelands  aReproduction  aResidual heat production1 aNAYA, H.1 aESPASANDÍN, A.C.1 aNAVAJAS, E.1 aDEVINCENZI, T.1 aCARRIQUIRY, M.  tTranslational Animal Science. 2024, txae005. https://doi.org/10.1093/tas/txae005  -- OPEN ACCESS. - [Accepted manuscript]