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Title: How precise are enteric methane emission phenotypes or breeding values estimated from spot flux measures?
Contributor(s): Cottle, David  (author)orcid ; Velasco, Jose (author); Mayer, David (author); Hegarty, Roger  (author); Herd, Robert M  (author)orcid 
Publication Date: 2015
Open Access: Yes
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Abstract: This study was conducted to determine the precision or confidence interval of phenotypes and estimated breeding values for enteric methane (CH₄) emissions of individual animals estimated from spot measurements of methane flux. Components of variance of daily methane production (DMP; gCH₄/d) and methane yield (MY; gCH₄/kg DMI) from trial data were used to estimate the precision for assumed heritability values. The precision was relatively insensitive to number of measures per animal per day and to the number of days of measurement. The values of the residual components of variance (between measures, within-animals, within-days) are high compared to between animal and between day variance but the confidence intervals for EBVs for DMP and MY estimated from spot flux measures are about 20% each side of the mean, which should be adequate for industry implementation in breeding schemes.
Publication Type: Conference Publication
Conference Details: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015
Source of Publication: Proceedings of the Twenty-first Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 421-424
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Bundoora, Australia
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Objective (SEO): 830301 Beef Cattle
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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Series Name: Proceedings of the AAABG ... Conference
Series Number : 21
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