02421nam a2200229 a 450000100080000000500110000800800410001902400380006010000190009824501440011726002000026130000130046150005330047452010550100765300180206265300280208065300100210870000200211870000180213870000160215670000190217210634592023-02-27       2022    bl uuuu     u01u1 u    #d7 a10.3920/978-90-8686-940-4_282DOI1 aMARQUES, C. B.  aGenetic parameters for feed efficiency, gas emissions, oxygen consumption and wool traits in Australian Merino. [28]h[electronic resource]  aIn: Proceedings of the World Congress on Genetics Applied to Livestock Production (WCGALP), 12., Rotterdam, the Netherlands, 3-8 July 2022. doi: https://doi.org/10.3920/978-90-8686-940-4_28c8686  a160-163.  aArticle history:  Published online: February 9, 2023. -- Corresponding authors: Camila Barconi Marques, email: cbalconi@inia.org.uy ; Gabriel Ciappesoni, email: gciappesoni@inia.org.uy --  Acknowledgements: This project has received funding from the European Union?s Horizon 2020 research and innovation program under grant agreement No 772787 (SMARTER). Furthermore, by INIA - "Instituto Nacional de Investigación Agropecuaria" (INIA_CL_38: RUMIAR), the SusAn, ICT-AGRI 2 and FACCE ERA-GAS funding bodies (GrassToGas project).  aABSTRACT.- The purpose of the present study was to estimate genetic parameters of growing globally important traits such as feed intake, residual feed intake, methane, carbon dioxide, oxygen consumption and greasy fleece weight in Uruguay. Data of three Australian Merino generations which integrate the Uruguayan National Genetic Evaluation for sheep were recorded (from 2019 to 2021). Heritabilities and genetic and phenotypic correlations were estimated for 930 animals sired by 19 rams. Results presented suggest that relevant genetic progress can be achieved in all traits (heritabilities between 0.23 and 0.41). Methane emission present moderate to high genetic correlations with the other traits (0.57-0.88). The most efficient animals will tend to consume less feed and emit less methane, without affecting wool production. The genetic correlation between wool production and the other traits were not significantly different from zero. The developing of this work will be the basis for the construction of agroecological breeding objectives.  aGas emissions  aMethane (CH4) emissions  aSHEEP1 aDE BARBIERI, I.1 aVELAZCO, J.I.1 aNAVAJAS, E.1 aCIAPPESONI, G.