Background:The pork industry faces unprecedented challenges from disease, which increases cost of production and use of antibiotics, and reduces production efficiency, carcass quality, and animal wellbeing. One solution is to improve the overall resilience of pigs to a broad array of common diseases through genetic selection. Behavioral changes in feeding and drinking are usually the very first clinical signs when animals are exposed to stressors such as disease. Changes in feeding and drinking behaviors in diseased pigs may reflect the way they cope with the challenge and, thus, could be used as indicator traits to select for disease resilience. The objectives of this study were to estimate genetic parameters of feeding and drinking traits for wean-to-finish pigs in a natural polymicrobial disease challenge model, to estimate genetic correlations of feeding and drinking traits with growth rate and clinical disease traits, and to develop indicator traits to select for disease resilience. Results:In general, drinking traits had moderate to high estimates of heritability, especially average daily water dispensed, duration, and number of visits (0.44 to 0.58). Similar estimates were observed for corresponding feeding traits (0.35 to 0.51). Most genetic correlation estimates among drinking traits were moderate to high (0.30 to 0.92) and higher than among feeding traits (0 to 0.11). Compared to other drinking traits, water intake duration and number of visits had relatively stronger negative genetic correlation estimates with treatment rate and mortality, especially across the challenge nursery and finisher (?0.39 and?0.45 for treatment rate;?0.20 and?0.19 for mortality). Conclusion:Most of the recorded drinking and feeding traits under a severe disease challenge had moderate to high estimates of heritability, especially for feed or water intake duration and number of visits. Phenotypic and genetic correlations among the recorded feeding traits under disease were generally low but drinking traits showed high correlations with each other. Water intake duration and number of visits are potential indicator traits to select for disease resilience because of their high heritability and had moderate genetic correlations with treatment and mortality rates under severe disease.

Jian Cheng;Austin M.Putz;John C.S.Harding;Michael K.Dyck;Frederic Fortin;Graham S.Plastow;Pig Gen Canada;Jack C.M.Dekkers

Department of Animal Science,Iowa State University,Ames,IA 50011,USA;Hendrix Genetics,Swine Business Unit,Boxmeer,The Netherlands 5831,CK;Department of Large Animal Clinical Science,University of Saskatchewan,Saskatoon,SK S7N 5A2,Canada;Department of Agriculture,Food and Nutritional Science,University of Alberta,Edmonton,AB T6G 2R3,Canada;Centre de Développement du Porc du Québec Inc.,Québec City G1V 4M6,Canada;PigGen Canada Research Consortium,Guelph,Ontario N1H4G8,Canada

畜牧与生物技术杂志（英文版）

[1]Jian Cheng;Austin M.Putz;John C.S.Harding;Michael K.Dyck;Frederic Fortin;Graham S.Plastow;Pig Gen Canada;Jack C.M.Dekkers-.Genetic parameters of drinking and feeding traits of wean-to-finish pigs under a polymicrobial natural disease challenge)[J].畜牧与生物技术杂志（英文版）,2022(01):17-35

wean,dispensed,finisher

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