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|Title:||Breeding Angus cattle that naturally emit less methane||Contributor(s):||Herd, Robert M (author) ; Donoghue, K (author); Bird, S H (author); Hegarty, Roger (author); Arthur, P F (author)||Publication Date:||2011||Handle Link:||https://hdl.handle.net/1959.11/18703||Abstract:||The aim of this experiment is to investigate and demonstrate genetic variation in daily methane production (MP; g/d), methane intensity (MI; MP per unit bodyweight; g/kg) and methane yield (MY; MP per unit feed intake; g/kg). Angus cows in pedigree- and performance-recorded research herds at Industry & Investment NSW research centres at Grafton and Trangie NSW were mated in 2007 to Angus bulls that had previously been recorded for MY. Bulls that had been identified as either phenotypically high or low for MY were used as sires in the Grafton herd; unselected sires were used in the Trangie herd. In 2010 the near 2-year-old bull progeny from Trangie and heifer progeny from Grafton were measured for MP, MI and MY. There were 8 sires with progeny represented in the Trangie bull data (n=63 progeny). A wide range in least-squares (LS) sire means was observed for MP (191g/d to 233g/d), MI (0.26g/kg to 0.63g/kg) and MY (24.3g/kg to 30.2g/kg). There were 6 sires with progeny represented in the Grafton heifer data (n=79 progeny). A wide range in LS sire means was observed for MP (133g/d to 165g/d), MP (0.15g/kg to 0.55g/kg) and MY (21.5g/kg to 27.0g/kg). The differences between sires for these traits that indicate that there may be genetic variation present and provide preliminary evidence that selection on a methane production trait may be possible.||Publication Type:||Conference Publication||Conference Name:||19th Conference of the Association for the Advancement of Animal Breeding and Genetics, Perth, Australia, 19th - 21st July, 2011||Conference Details:||19th Conference of the Association for the Advancement of Animal Breeding and Genetics, Perth, Australia, 19th - 21st July, 2011||Source of Publication:||Breeding Objectives: A New Paradigm, p. 187-190||Publisher:||AAABG: Association for the Advancement of Animal Breeding and Genetics||Place of Publication:||Perth, Australia||Field of Research (FOR):||070201 Animal Breeding||Socio-Economic Outcome Codes:||830301 Beef Cattle||Peer Reviewed:||Yes||HERDC Category Description:||E1 Refereed Scholarly Conference Publication||Other Links:||http://www.aaabg.org/aaabg19/||Series Name:||Proceedings of the AAABG ... Conference||Series Number :||19||Statistics to Oct 2018:||Visitors: 140
|Appears in Collections:||Conference Publication|
School of Environmental and Rural Science
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