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Title: Estimates of variances due to sire x herd effects for weights of Hereford cattle
Contributor(s): Meyer, Karin  (author)
Publication Date: 2003
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Abstract: Estimating variances due sire x herd effects requires a large number of sires to be represented in multiple herds, otherwise too much variation between animals is 'picked up' as variance due to sire x herd effects, and heritability estimates are biased downwards. Such bias can be avoided by using only records for progeny of multiple-herd use sires to estimate the additive genetic variance. Estimates of variance components and genetic parameters from analyses of weights of Hereford cattle are presented for herds with high, medium and low proportions of sires used across multiple herds. Results from analyses estimating separate genetic variances for progeny of single and multiple herd sires, estimating a joint genetic variance for all animals, and ignoring sire x herd effects are compared.
Publication Type: Conference Publication
Conference Details: 15th Conference of the Association for the Advancement of Animal Breeding and Genetics, Melbourne, Australia, 7-11 July, 2003
Source of Publication: Proceedings of the 15th Conference of the Association for the Advancement of Animal Breeding and Genetics, p. 131-134
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Melbourne, VIC, Australia
ISSN: 1328-3227
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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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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