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Evaluating environmental impacts of selection for residual feed intake in pigs.
Animal. 2020 Jun 22 [Online ahead of print]A

Abstract

To identify a proper strategy for future feed-efficient pig farming, it is required to evaluate the ongoing selection scenarios. Tools are lacking for the evaluation of pig selection scenarios in terms of environmental impacts to provide selection guidelines for a more sustainable pig production. Selection on residual feed intake (RFI) has been proposed to improve feed efficiency and potentially reduce the associated environmental impacts. The aim of this study was thus to develop a model to account for individual animal performance in life cycle assessment (LCA) methods to quantify the responses to selection. Experimental data were collected from the fifth generation of pig lines divergently selected for RFI (low line, more efficient pigs, LRFI; high line, less efficient pigs, HRFI). The average feed conversion ratio (FCR) and daily feed intake of LRFI pigs were 7% lower than the average of HRFI pigs (P < 0.0001). A parametric model was developed for LCA based on the dietary net energy fluxes in a pig system. A nutritional pig growth tool, InraPorc®, was included as a module in the model to embed flexibility for changes in feed composition, animal performance traits and housing conditions and to simulate individual pig performance. The comparative individual-based LCA showed that LRFI had an average of 7% lower environmental impacts per kilogram live pig at farm gate compared to HRFI (P < 0.0001) on climate change, acidification potential, freshwater eutrophication potential, land occupation and water depletion. High correlations between FCR and all environmental impact categories (>0.95) confirmed the importance of improvement in feed efficiency to reduce environmental impacts. Significant line differences in all impact categories and moderate correlations with impacts (>0.51) revealed that RFI is an effective measure to select for improved environmental impacts, despite lower correlations compared to FCR. Altogether more optimal criteria for efficient environment-friendly selection can then be expected through restructuring the selection indexes from an environmental point of view.

Authors+Show Affiliations

GenPhySE, Université de Toulouse, INRAE, F-31326, Castanet-Tolosan, France.GenPhySE, Université de Toulouse, INRAE, F-31326, Castanet-Tolosan, France.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32624079

Citation

Soleimani, T, and H Gilbert. "Evaluating Environmental Impacts of Selection for Residual Feed Intake in Pigs." Animal : an International Journal of Animal Bioscience, 2020, pp. 1-11.
Soleimani T, Gilbert H. Evaluating environmental impacts of selection for residual feed intake in pigs. Animal. 2020.
Soleimani, T., & Gilbert, H. (2020). Evaluating environmental impacts of selection for residual feed intake in pigs. Animal : an International Journal of Animal Bioscience, 1-11. https://doi.org/10.1017/S175173112000138X
Soleimani T, Gilbert H. Evaluating Environmental Impacts of Selection for Residual Feed Intake in Pigs. Animal. 2020 Jun 22;1-11. PubMed PMID: 32624079.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluating environmental impacts of selection for residual feed intake in pigs. AU - Soleimani,T, AU - Gilbert,H, Y1 - 2020/06/22/ PY - 2020/7/7/entrez KW - feed efficiency KW - growth performance traits KW - life cycle assessment KW - net energy flux KW - selection by genetics SP - 1 EP - 11 JF - Animal : an international journal of animal bioscience JO - Animal N2 - To identify a proper strategy for future feed-efficient pig farming, it is required to evaluate the ongoing selection scenarios. Tools are lacking for the evaluation of pig selection scenarios in terms of environmental impacts to provide selection guidelines for a more sustainable pig production. Selection on residual feed intake (RFI) has been proposed to improve feed efficiency and potentially reduce the associated environmental impacts. The aim of this study was thus to develop a model to account for individual animal performance in life cycle assessment (LCA) methods to quantify the responses to selection. Experimental data were collected from the fifth generation of pig lines divergently selected for RFI (low line, more efficient pigs, LRFI; high line, less efficient pigs, HRFI). The average feed conversion ratio (FCR) and daily feed intake of LRFI pigs were 7% lower than the average of HRFI pigs (P < 0.0001). A parametric model was developed for LCA based on the dietary net energy fluxes in a pig system. A nutritional pig growth tool, InraPorc®, was included as a module in the model to embed flexibility for changes in feed composition, animal performance traits and housing conditions and to simulate individual pig performance. The comparative individual-based LCA showed that LRFI had an average of 7% lower environmental impacts per kilogram live pig at farm gate compared to HRFI (P < 0.0001) on climate change, acidification potential, freshwater eutrophication potential, land occupation and water depletion. High correlations between FCR and all environmental impact categories (>0.95) confirmed the importance of improvement in feed efficiency to reduce environmental impacts. Significant line differences in all impact categories and moderate correlations with impacts (>0.51) revealed that RFI is an effective measure to select for improved environmental impacts, despite lower correlations compared to FCR. Altogether more optimal criteria for efficient environment-friendly selection can then be expected through restructuring the selection indexes from an environmental point of view. SN - 1751-732X UR - https://www.unboundmedicine.com/medline/citation/32624079/Evaluating_environmental_impacts_of_selection_for_residual_feed_intake_in_pigs L2 - https://www.cambridge.org/core/product/identifier/S175173112000138X/type/journal_article DB - PRIME DP - Unbound Medicine ER -
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