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Title: The Impact of Measuring Adult Fleece Traits With Genomic Selection on Economic Gain in Merino Selection Indexes
Contributor(s): Swan, Andrew  (author); Brown, Daniel  (author)
Publication Date: 2013
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Abstract: Stochastic simulation of a Merino sheep breeding program showed that measurement of adult fleece weight and fibre diameter, the two key adult production traits in Merino sheep, increased economic gain compared to measuring yearling expressions of the traits alone. Comparing three different selection indexes, gain increased in fleece weight by up to $1.10 per ewe per year over 10 years of selection, depending on the importance of the trait in the selection index. For fibre diameter the increase in gain was lower, to a maximum of $0.70 per ewe per year, because genetic correlations between yearling and adult performance are higher for fibre diameter. There was little benefit in multiple adult measurements of these traits, and since the Australian sheep industry's evaluation system already accommodates one adult measurement, most of the gains possible can be realised by breeders. Genomic selection of young rams resulted in further increases in gain when combined with adult measurements, particularly for fleece weight.
Publication Type: Conference Publication
Conference Details: 20th Conference of the Association for the Advancement of Animal Breeding and Genetics: Translating Science into Action, Napier, New Zealand, 20th - 23rd October, 2013
Source of Publication: Proceedings of the Twentieth Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 233-236
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Palmerston North, New Zealand
Field of Research (FOR): 070201 Animal Breeding
Socio-Economic Objective (SEO): 830311 Sheep - Wool
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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Series Name: Proceedings of the AAABG ... Conference
Series Number : 20
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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