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Comparative gastrointestinal, tibia, and plasma attributes in 48-day-old fast- and slow-growing broiler chicken strains

Show simple item record Mohammadigheisar, Mohsen Shouldice, Victoria Torrey, Stephanie Widowski, Tina Kiarie, Elijah G. 2020-10-30T17:12:16Z 2020-10-30T17:12:16Z 2020-03 2020-06
dc.description.abstract Emerging market differentiation for broiler meat from strains exhibiting a range of growth rates is necessitating comparative research on various physiological and production aspects of these strains. The objective of the present study was to compare select gastrointestinal, tibial, and plasma attributes in a sample of 48-day-old (50 male and 50 female) broilers obtained from fast-and slow-growing flocks maintained under similar feed and management regimens. Eight birds were randomly selected from a fast (B; representative of modern commercial strains) and each of the 4 slow-growing strains (SG; D, H, M, and E). The strains differed by estimated time to reach 2.2 kg body weight corresponding to 36, 50, 42, 44, and 50 D for B, D, H, M, and E, respectively. Blood samples were collected to determine plasma metabolites, and birds were subsequently euthanized, weighed, and necropsied for gizzard and small intestine weight, jejunal tissue for histomorphology, ceca digesta samples for concentration of short-chain fatty acids (SCFA) and left tibia for ash content. Gizzard was heavier (P < 0.01) for D, H, and M than that for B and E, whereas the small intestine was lighter (P < 0.01) for B, D, and H than for M and E. There were no (P > 0.05) strain differences on SCFA, jejunal villus height and crypt depth, plasma proteins, and electrolytes. Strains D, H, and M exhibited higher (P = 0.01) tibia ash concentration than B; E was intermediate and not different (P > 0.05) from any strain. Specifically, the tibia ash for B, D, H, SG 3, and E were 1.24, 1.44, 1.43, 1.49, and 1.39 g/kg BW, respectively. The B birds showed higher (P < 0.01) plasma concentrations of aspartate transaminase, creatine kinase, lactate dehydrogenase, and creatinine than SG strains. In conclusion, although B and some SG strains had lighter gastrointestinal tract indicative of energy efficiency, higher circulating plasma enzymes in B birds suggested impaired hepatic function. Moreover, lower tibia ash in B suggested disproportionate body mass relative to skeletal support.
dc.description.sponsorship Global Animal Partnership; Canada First Research Excellence Fund; Ontario Agri-Food Alliance Initiative en_US
dc.language.iso en en_US
dc.publisher Poultry Science en_US
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject broiler en_US
dc.subject chicken en_US
dc.subject poultry en_US
dc.subject growth rate en_US
dc.subject gastrointestinal weight en_US
dc.subject welfare en_US
dc.subject digesta short chain fatty acids en_US
dc.subject plasma metabolites en_US
dc.title Comparative gastrointestinal, tibia, and plasma attributes in 48-day-old fast- and slow-growing broiler chicken strains en_US
dc.type Article en_US Department of Animal Biosciences en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dcterms.relation Mohammadigheisar M, Shouldice VL, Torrey S, Widowski T, Kiarie EG. Research Note: Comparative gastrointestinal, tibia, and plasma attributes in 48-day-old fast-and slow-growing broiler chicken strains. Poultry Science. 2020 Mar 26. en_US

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