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Title: The Genetics of Brahman Cow Weight in Northern Australia and its Relationship with Female Reproductive Performance
Contributor(s): Wolcott, Matthew L  (author); Johnston, David  (author); Van Der Werf, Julius H  (author)orcid 
Publication Date: 2014
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Abstract: Annual weights from 1025 Brahman cows, commencing at their first annual mating (average 2 years of age) were evaluated in a univariate random regression analysis. Results showed that cow weight from 2 to 7 years was heritable (h² = 0.31 to 0.53). The analysis was extended to include a second dependent variable describing female reproductive performance (age at puberty (AP), lactation anoestrus interval (LAI) or lifetime annual weaning rate (LAWR)). Genetic correlations of AP with cow weight were low (rg = -0.09 to 0.03), while lower LAI and higher LAWR displayed moderate genetic relationships with higher early cow weight which decreased with cow age (rg=-0.28 to 0.02 and 0.37 to 0.11 respectively). Results show that if Brahman breeders in northern Australia select to improve female reproductive performance, correlated responses in cow weight would be small and expected to diminish with cow age.
Publication Type: Conference Publication
Conference Name: WCGALP 2014: 10th World Congress on Genetics Applied to Livestock Production, Vancouver, Canada, 17th - 22nd August, 2014
Conference Details: WCGALP 2014: 10th World Congress on Genetics Applied to Livestock Production, Vancouver, Canada, 17th - 22nd August, 2014
Source of Publication: Proceedings of the 10th World Congress on Genetics Applied to Livestock Production (WCGALP) (Species Breeding: Beef cattle), p. 1-3
Publisher: American Society of Animal Science
Place of Publication: Champaign, United States of America
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
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Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
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