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dc.contributor.authorCheng, Paulen
dc.contributor.authorLogan, Christopher M.en
dc.contributor.authorDewhurst, Richard J.en
dc.contributor.authorHodge, Simonen
dc.contributor.authorZhou, Huitongen
dc.contributor.authorEdwards, Granten
dc.date.accessioned2016-05-19T01:20:49Z
dc.date.available2015-12-18en
dc.date.issued2015-12-01en
dc.date.submitted2015-09-25en
dc.identifier.citationCheng, L., Logan, C. M., Dewhurst, R. J., Hodge, S., Zhou, H., & Edwards, G. R. (2015). Effects of feed intake and genetics on tissue nitrogen-15 enrichment and feed conversion efficiency in sheep. Journal of Animal Science, 93(12), 5849-5855. doi:10.2527/jas.2015-9638en
dc.identifier.issn0021-8812en
dc.identifier.urihttps://hdl.handle.net/10182/6975
dc.description.abstractThis study investigated the effects of sheep genetics and feed intake on nitrogen isotopic fractionation (Δ15N) and feed conversion efficiency (FCE; live weight gain/DMI), using a 2 × 2 factorial design, with 2 levels of genetic merit for growth (high vs. low) and 2 levels of feed intake (110 vs. 170% of ME for maintenance [MEm]). No effect of genetic merit was detected for live weight gain (P = 0.64), FCE (P = 0.46), plasma urea nitrogen (P = 0.52), plasma glucose (P = 0.78), and Δ15N of wool (P = 0.45), blood (P = 0.09), and plasma (P = 0.51). Sheep receiving 170% of MEm had 175% higher live weight gain (P < 0.001) and 77% higher FCE (P < 0.001) than sheep receiving 110% of MEm. There was no difference among treatments at the beginning of the study for either blood or plasma ∆15N, but the treatment groups started to diverge in blood and plasma ∆15N at 21 and 7 d, respectively. Blood, plasma, and wool samples were enriched in 15N compared with feed. There was a higher blood, plasma, and wool ∆15N for the low feed intake group than the high feed intake group (P < 0.001 in all cases). Across the 4 treatment groups, higher FCE in sheep was associated with lower ∆15N for plasma, blood, and wool. Overall, the results are consistent with the potential of ∆15N as a rapid, lowcost biomarker of FCE in sheep, despite there being no effects of genetic treatment on FCE and ∆15N.en
dc.format.extent5849-5855en
dc.languageEnglishen
dc.language.isoenen
dc.publisherOxford University Press on behalf of the American Society of Animal Scienceen
dc.relationThe original publication is available from - Oxford University Press on behalf of the American Society of Animal Science - https://doi.org/10.2527/jas.2015-9638en
dc.relation.urihttp://www.ncbi.nlm.nih.gov/pubmed/26641195en
dc.relation.urihttps://doi.org/10.2527/jas.2015-9638en
dc.rights© 2015 American Society of Animal Science. All rights reserved.en
dc.subjectgenetic and nutritional interactionen
dc.subjectgrowth potentialen
dc.subjectisotopic discriminationen
dc.subjectlive weight gainen
dc.subjectnitrogen-15en
dc.subjectDairy & Animal Scienceen
dc.subject.meshWoolen
dc.subject.meshAnimalsen
dc.subject.meshSheep, Domesticen
dc.subject.meshWeight Gainen
dc.subject.meshNitrogenen
dc.subject.meshNitrogen Isotopesen
dc.subject.meshBlood Glucoseen
dc.subject.meshBlood Urea Nitrogenen
dc.subject.meshEatingen
dc.subject.meshAnimal Feeden
dc.subject.meshBiomarkersen
dc.titleEffects of feed intake and genetics on tissue nitrogen-15 enrichment and feed conversion efficiency in sheepen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
lu.contributor.uniten
lu.contributor.uniten
lu.contributor.unitVice Chancellor's Officeen
dc.identifier.doi10.2527/jas.2015-9638en
dc.subject.anzsrc07 Agricultural and Veterinary Sciencesen
dc.subject.anzsrc06 Biological Sciencesen
dc.relation.isPartOfJournal of Animal Scienceen
pubs.issue12en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.organisational-group/LU/Vice Chancellor's Office
pubs.publication-statusPublisheden
pubs.volume93en
dc.identifier.eissn1525-3163en
lu.identifier.orcid0000-0001-7620-3160
lu.identifier.orcid0000-0002-8909-2954
lu.identifier.orcid0000-0003-4165-007X


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