The interrelationship between genotype, sex, and dietary lysine effecfs on growth performance and Protin accretion in finishing pigs fed to 230 and 280 lb

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dc.contributor.author Friesen, K.G.
dc.contributor.author Kats, L.J.
dc.contributor.author Hansen, J.A.
dc.contributor.author Laurin, J.L.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Unruh, John A.
dc.date.accessioned 2010-02-11T22:34:54Z
dc.date.available 2010-02-11T22:34:54Z
dc.date.issued 2010-02-11T22:34:54Z
dc.identifier.uri http://hdl.handle.net/2097/2547
dc.description.abstract One hundred and twenty pigs (initially 96 lb BW) were used to determine the interrelationship between genotype, sex, and dietary lysine effects on growth performance and carcass composition in a 2 x 2 x 2 factorial arrangement. Genetic comparisons were made between pigs characterized by either high or medium potential for lean tissue gain. Within genotype, barrows and gilts were separately fed either a .90 or a .70% lysine diet until the mean weight of pigs in each pen of three reached 230 lb. One pig per pen was then slaughtered to determine carcass characteristics and chemical composition. From 230 to 280 lb, dietary lysine was lowered to .75 or .55% for pigs fed .90 or .70%dietary lysine, respectively. When the pig mean weight met or exceeded 280 lb, both pigs were slaughtered to determine carcass characteristics and chemical composition. The right side of the carcass was then ground and chemically analyzed to determine protein and lipid accretion rates. No interactions were detected; therefore, main effect means will be discussed. At 230 lb, high lean-gain pigs had increased ADG and gain to feed ratio compared to medium lean-gain pigs. Barrows had increased ADG and ADFI, but exhibited a poorer feed to gain ratio than gilts. Pigs fed .90% lysine had improved ADG compared to pigs fed .70% lysine. High lean gain pigs had increased CP accretion and lipid accretion compared to medium lean-gain pigs. Similarly, gilts had increased CP accretion and decreased lipid accretion compared to barrows. Cumulative ADG (96 to 280 lb) was greater for high lean gain pigs, barrows, and pigs in the .90/.75% lysine regimen. Average daily feed intake was increased in barrows compared to gilts. Gilts had greater CP accretion than barrows. Crude protein accretion was greater in high lean gain pigs compared to medium lean-gain pigs, with high lean gain gilts having the greatest magnitude of response to increased dietary lysine. High lean-gain pigs exhibited greater growth performance and CP accretion compared to medium-lean pigs, with high lean-gain gilts offering the largest potential for maximized lean tissue accretion and improved lean efficiency. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1992 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 93-142-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 667 en_US
dc.subject Swine en_US
dc.subject Pigs en_US
dc.subject Lysine en_US
dc.subject Sex en_US
dc.subject Carcass composition en_US
dc.subject Genotypes en_US
dc.title The interrelationship between genotype, sex, and dietary lysine effecfs on growth performance and Protin accretion in finishing pigs fed to 230 and 280 lb en_US
dc.type Conference paper en_US
dc.date.published 1992 en_US
dc.citation.epage 96 en_US
dc.citation.spage 91 en_US
dc.description.conference Swine Day, Manhattan, KS, November 19, 1992 en_US


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