Assessment of methane emission traits in Canadian Holstein cows

dc.contributor.advisorFlavio, Schenkel
dc.contributor.advisorChristine, Baes
dc.contributor.authorKamalanathan, Stephanie
dc.date.accessioned2020-09-15T19:13:54Z
dc.date.available2020-09-15T19:13:54Z
dc.date.copyright2020-09
dc.date.created2020-09-08
dc.degree.departmentDepartment of Animal Biosciencesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeAnimal and Poultry Scienceen_US
dc.description.abstractEnteric methane production from ruminants represents a loss of productive energy and contributes to greenhouse gas emissions. This thesis presents a phenotypic data description and genetic parameter estimates of three methane emission traits (methane production, yield, and intensity) in Canadian Holstein cows. The variation of methane production across different times of recording within a day was also assessed. Lastly, the potential re-ranking of estimated breeding values for the alternative methane traits was evaluated. Methane emission traits were found to be moderately heritable, and moderate to high genetic correlations between pairs of methane traits were found. Therefore, genetic selection for methane emission is possible. Direct selection for one trait will indirectly improve the other traits, however, substantial re-ranking of estimated breeding values was observed, especially among the sires. Thus, the methane emission trait of choice will depend on how it will possibly be included in the genetic evaluation program.en_US
dc.identifier.urihttps://hdl.handle.net/10214/21264
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rightsAttribution-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nd/4.0/*
dc.subjectHolstein cowsen_US
dc.subjectmethane traitsen_US
dc.subjectselectionen_US
dc.subjectgenetic parametersen_US
dc.subjectresponse to selectionen_US
dc.subjectcattleen_US
dc.titleAssessment of methane emission traits in Canadian Holstein cowsen_US
dc.typeThesisen_US

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