Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/19023
Title: Impact of Scanning Lean Cattle on the Genetic Correlation Between Scan and Carcase Intramuscular Fat in Angus and Hereford Cattle
Contributor(s): Walkom, Samuel  (author); Jeyaruban, M Gilbert  (author); Johnston, David  (author)
Publication Date: 2015
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/19023
Open Access Link: http://www.aaabg.org/aaabghome/AAABG21papers/Walkom21253.pdfOpen Access Link
Abstract: BREEDPLAN, the Australian beef cattle genetic evaluation system, uses ultrasound scan intramuscular fat as a correlated trait for predicting carcase intramuscular fat. More recently, it has been observed that seedstock herds are being scanned at younger ages and lower levels of fatness and this research was undertaken to examine the effect on heritability and the genetic correlation estimates when scan records are removed using fat depth thresholds. Using BREEDPLAN data to estimate these genetic relationships, this study yielded genetic correlation estimates of 0.37 and 0.36 in Angus and 0.69 and 0.54 in Hereford for bull and heifer scan intramuscular fat, respectively. The results showed a useful improvement in the genetic correlation between bull intramuscular fat and carcase intramuscular fat in Angus cattle to 0.48. However, for Angus heifers and Hereford bulls and heifers there was no significant improvement, suggesting that strategies to reduce lean scanning will not improve the genetic correlation estimates in those cases.
Publication Type: Conference Publication
Conference Name: 21st Conference of the Association for the Advancement of Animal Breeding and Genetics, Lorne, Australia, 28th - 30th September, 2015
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. 253-256
Publisher: AAABG: Association for the Advancement of Animal Breeding and Genetics
Place of Publication: Bundoora, Australia
ISSN: 1328-3227
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/aaabghome/proceedings21.php
Series Name: Proceedings of the AAABG ... Conference
Series Number : 21
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication

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