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|Title:||Estimates of genetic correlations between live ultrasound scan traits and days to calving in Hereford cattle||Contributor(s):||Meyer, Karin (author); Johnston, David (author)||Publication Date:||2003||Handle Link:||https://hdl.handle.net/1959.11/4354||Abstract:||Restricted maximum likelihood estimates of genetic correlations between between live ultrasound scan measurements and days to calving were obtained from bivariate analyses. Scan traits considered were fat depth at the 12/13-th rib, P8 fat depth, percentage intramuscular fat and eye muscle area, treating records for heifers or steers and bulls as separate traits. Analyses were carried out including all days to calving records, and considering the subset of cows only which had a 'complete sequence' of records, beginning with a first mating record. Heritability estimates for days to calving were low, about 3% with a repeatability of 18%. Estimates of genetic correlations were low to moderate, and consistently negative for fat depth measurements, i.e. animals with a higher genetic potential for fat deposition tended to have better reproductive performance.||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. 387-390||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||Other Links:||http://trove.nla.gov.au/work/22223828?selectedversion=NBD24379203
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|Appears in Collections:||Animal Genetics and Breeding Unit (AGBU)|
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