Performance and Carcass Composition of Growing-finishing Pigs Fed Wheat or Corn-based Diets

  • Han, Yung-Keun (Livestock Research Institute, National Agricultural Co-operative Federation) ;
  • Soita, H.W. (Department of Animal Science, University of Saskatchewan) ;
  • Thacker, P.A. (Department of Animal Science, University of Saskatchewan)
  • Received : 2004.09.22
  • Accepted : 2005.01.14
  • Published : 2005.05.01


The objective of this experiment was to compare corn and wheat in finishing pig diets in order to determine whether performance, carcass quality, fatty acid composition or fat colour is altered by choice of cereal grain. A total of 126 crossbred pigs were used in this experiment. At the start of the experiment, a portion of the experimental animals were assigned to receive a wheat-based diet formulated using soybean meal as the sole source of supplementary protein. The remainder of the pigs were assigned to a corn-based diet formulated to supply a similar level of lysine (0.65%) and energy (3,300 kcal/kg DE). At two week intervals, a portion of the pigs on the corn-based diet were switched to the wheat-based diet so that a gradient was produced with pigs being fed the corn and wheatbased diets for different proportions of the finishing period ranging from 100% on wheat to 100% on corn. There were no significant differences in the growth rate of pigs fed the two diets (p = 0.834). Pigs fed wheat tended to consume slightly less feed (p = 0.116) and had a significantly improved feed conversion (p = 0.048) compared with pigs fed corn. Choice of cereal did not affect dressing percentage (p = 0.691), carcass value index (p = 0.146), lean yield (p = 0.134), loin fat (p = 0.127) or loin lean (p = 0.217). Fatty acid composition of backfat was unaffected by the cereal grain fed (p>0.05). Total saturated fatty acid content was 33.31% for both corn and wheat fed pigs (p = 0.997) while the polyunsaturated fatty acid content was 12.01% for corn fed pigs and 11.21% for wheat fed pigs (p = 0.257). The polyunsaturated/saturated ratio was 0.36 for pigs fed corn and 0.34 for pigs fed wheat (p = 0.751). Hunter Lab Colour Scores indicated no difference either in the whiteness or yellowness of the fat. In conclusion, wheat can substitute for corn in growingfinishing pig rations without detrimental effects on pig performance. There were no differences in either the fatty acid composition of backfat or in backfat colour indicating that the decision to use wheat vs. corn needs to be made on economic grounds rather than being based on their effects on fat quality.


Supported by : National Agricultural Co-operative Federation


  1. Gatlin, L. A., M. T. See, J. A. Hansen, D. Sutton and J. Odle. 2002. The effects of dietary fat sources, levels and feeding intervals on pork fatty acid composition. J. Anim. Sci. 80:1606-1615.
  2. Jeremiah, L. E. 1994. Consumer responses to pork loin chops with different degrees of muscle quality in two western Canadian cities. Can. J. Anim. Sci. 74:425-432.
  3. Kubow, S. 1990. Toxicity of dietary lipid peroxidation products. Trends Food Sci. Technol. 1:67-71.
  4. National Research Council. 1994. Nutrient Requirements of Poultry. 9th ed. NAS-NRC, Washington, DC.
  5. Statistical Analysis System Institute Inc. 1990. SAS/STAT Users Guide, Version 6, Fourth Edition. SAS Institute Inc., Cary, NC.
  6. Thacker, P. A., V. J. Racz and H. W. Soita. 2004. Performance and carcass characteristics of growing-finishing pigs fed barleybased diets supplemented with Linpro (extruded whole flaxseed and peas) or soybean meal. Can. J. Anim. Sci. 84:681-688.
  7. Wood, J. D., R. I. Richardson, G. R. Nute, A. V. Fisher, M. M. Campo, E. Kasapidou, P. R. Sheard and M. Enser. 2003. Effects of fatty acids on meat quality: A review. Meat Sci. 66:21-32.
  8. Bell, J. M. and M. O. Keith. 1993. Effects of combinations of wheat, corn, or hulless barley with hulled barley supplemented with soybean meal or canola meal on growth rate, efficiency of feed utilization and carcass quality of market pigs. Anim. Feed Sci. Technol. 44:129-150.
  9. Saskatchewan Pork International. 2000. Mitchell’s Gourmet Foods, Inc Hog Settlement Grid. Saskatoon, Sask. p. 2.
  10. Warnants, N., M. J. Van Oeekel and C. V. Boucque. 1999. Incorporation of dietary polyunsaturated fatty acids into pork fatty tissues. J. Anim. Sci. 77:2478-2490.
  11. McConnell, J. C., G. C. Skelly, D. L. Handlin and W. E. Johnston. 1975. Corn, wheat, milo and barley with soybeans and their effect on feedlot performance, carcass traits and pork acceptability. J. Anim. Sci. 41:1021-1030.
  12. Mir, Z., M. L. Rushfeldt, P. S. Mir, L. J. Paterson and R. J. Weselake. 2000. Effect of dietary supplementation with either CLA or linoleic acid rich oil on the CLA content of lamb tissues. Small Ruminant Res. 36:25-31.
  13. Lewis, A. J. 2001. Amino acids in swine nutrition. In: Swine Nutrition. (Ed. A. J. Lewis and L. L. Southern). CRC Press, Boca Raton, Florida. pp. 131-150.
  14. Myer, R. O., W. R. Walker and R. D. Barnett. 1999. Feeding wheat to swine. University of Florida Cooperative Extension Service Fact Sheet AS 25, p. 6.
  15. Wachholz, D., R. G. Kauffman,D. Henderson and J. V. Lochner. 1978. Consumer discrimination of pork color at the market place. J. Food Sci. 43:1150-1152.
  16. Rodgers, R. W. and D. E. Etzler. 2000. Effects of dietary fat supplementation of swine diets and subsequent packaging and storage conditions on rancidity development and sensory ratings of bacon. Prof. Anim. Scientist, 16:47-53.
  17. Gray, G. I., E. A. Gomaa and D. J. Buckley. 1996. Oxidative quality and shelf life of meats. Meat Sci. 43:S111.
  18. Han, In K., D. J. Yoon and J. H. Choi. 1975. Studies on the substitution of Canadian barley, and utility wheat for corn in the rations of growing hogs. Kor. J. Anim. Sci. 17:123-131.
  19. Ministry of Agriculture and Forestry. 2003. In Pork Carcass Grade, 'Meat Quality, Fat Colour and Quality' Notice 2003-14.
  20. Topel, D. G., J. A. Miller, P. J. Berger, R. E. Rust, F. C. Parrish and K. Onon. 1976. Palatability and visual acceptance of dark, normal and pale colored porcine M. Longissimus. J. Food Sci. 41:628-630.
  21. Van Lunen,T. A. and H. Schulze.1996. Influence of Trichoderma longibrachiatum xylanase supplementation of wheat and corn based diets on growth performance of pigs. Can. J. Anim. Sci. 76:271-273.
  22. Caggiula, A. W. and V. A. Mustad. 1997. Effects of dietary fatty acids on coronary artery disease risk and total lipoprotein cholesterol concentrations: Epidemiologic studies. Am. J. Clin. Nutr. 65:1597S-1610S.
  23. Jaturasitha, S., Y. Wudthithumkanaporn, P. Rurksasen and M. Kreuzer. 2002. Enrichment of pork with omega-3 fatty acids by tuna oil supplements: Effects on performance as well as sensory, nutritional and processing properties of pork. Asian-Aust. J. Anim. Sci. 15:1622-1633.
  24. Novus. 1994. Raw Material Compendium: A Compilation of Worldwide Data Sources. 2nd Edition. Novus International Inc., Brussels, Belgium, p. 541.
  25. Bosi, P. 1999. Feeding strategies to produce high quality pork. Asian-Aust. J. Anim. Sci. 12:271-281.
  26. Raes, K., S. De Smet and D. Demeyer. 2004. Effect of dietary fatty acids on incorporation of long chain polyunsaturated fatty acids and conjugated linoleic acid in lamb, beef and pork meat: A review. Anim. Feed Sci. Technol. 113:199-221.
  27. Breidenstein, B. C. 1987. Nutrient value of meat. Food Nutr. News 59:43.
  28. Corino, C., S. Magni, E. Pagliarini, R. Rossi, G. Pastorelli and L. M. Chiesa. 2002. Effects of dietary fats on meat quality and sensory characteristics of heavy pig loins. Meat Sci. 60:1-8.
  29. National Research Council. 1998. Nutrient Requirements of Swine. 10th ed. NAS-NRC, Washington, DC.
  30. Shantha, N. C., E. A. Decker and B. Hennig. 1993. Comparison of methylation methods for the quantitation of conjugated linoleic acid isomers. J. AOAC Int. 76:644-649.
  31. Thacker, P. A. and R. N. Kirkwood. 1990. Nontraditional Feed Sources for Use in Swine Production. Butterworth Publishers, Stoneham, MA. p. 551.
  32. Brendemuhl, J. H., R. O. Myer and D. D. Johnson. 1996. Influence of feeding growing-finishing pigs triticale, wheat or maize based diets on resulting carcass composition and on taste and quality characteristics of pork. In: Developments in Plant Breeding. Triticale: Today and Tomorrow. (Ed. H. Guedes-Pinto, N. Darvey and V. P. Carnide). Kluwer Academic Publishers, Dordrecht, The Netherlands. pp. 807-811.
  33. Kim, D. H., J. H. Woo and C. Y. Lee. 2004. Effects of stocking density and transportation time of market pigs on their behaviour, plasma concentrations of glucose and stress associated enzymes and carcass quality. Asian-Aust. J. Anim. Sci. 17:116-121.
  34. Bauernfeind, J. C., C. R. Adams and W. L. Marusich. 1981. Carotenes and other vitamin A precursors in animal feed. In: Carotenoids as Colorants and Vitamin A Precursors. (Ed J. C. Bauernfeind). Academic Press, New York pp. 563-744.
  35. Choi, S. C., B. J. Chae and In K Han. 2001. Impacts of dietary vitamins and trace minerals on growth and pork quality in finishing pigs. Asian-Aust. J. Anim. Sci. 14:1444-1449.
  36. Warnants, N., M. J. Van Oeekel and C. V. Boucque. 1998. Effect of incorporation of dietary polyunsaturated fatty acids in pork backfat on the quality of salami. Meat Sci. 49:435-445.
  37. Association of Analytical Chemists. 1990. Official Methods of Analysis, 15th edn, AOAC, Washington, DC.
  38. Kurilich, A. C. and J. A. Juvik. 1999. Quantification of carotenoid and tocopherol antioxidants in Zea mays. J. Agric. Food Chem. 47:1948-1955.
  39. Pastorelli, G., S. Magni, R. Rossi, E. Pagliarini, P. Baldini, P. Dirinck, F. Van Opstaele and C. Corino. 2003. Influence of dietary fat, on fatty acid composition and sensory properties of dry-cured Parma ham. Meat Sci. 65:571-580.

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