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https://hdl.handle.net/1959.11/9862
Title: | Genetic variation in growth patterns is associated with sow lifetime performance | Contributor(s): | Bunter, Kim L (author); Lewis, Craig (author) | Publication Date: | 2011 | Handle Link: | https://hdl.handle.net/1959.11/9862 | Abstract: | Longitudinal data for weight and fat from up to 19 recording events were used in random regression (RR) analyses to generate estimates of additive genetic and permanent environmental effects for sow development attributes up to parity 5. Sows (N=3324) were then ranked in quartiles using solutions from the RR for additive genetic effects which separately describe intercept and slope, generating 16 combinations (intercept x slope) for development trajectories within trait. Lifetime productivity of sows was compared between these groups. Genetic variation in development trajectories was evident, but similar phenotypes can arise from different trajectories. Differences in lifetime productivity, measured as the total number of piglets born (LTB) or litters produced (LPL) prior to culling, was significantly associated with genetic differences in development patterns. While sows survived and reproduced over a wide range of body weights and adiposity levels, generally heavier and fatter sows were more likely to enter the breeding herd successfully. However, sows with low rank for intercept combined with high rank for slope, putatively representing a "later" development pattern that should increase competition for limited resources in the breeding sow, had significantly (P<0.0001) reduced LPL and LTB in particular. This outcome suggests that associations between traits like body weight and fatness with sow lifetime performance are not independent of the timing in body development relative to the physiological demands of reproduction. | Publication Type: | Conference Publication | Conference Details: | AAABG 2011: 19th Conference of the Association for the Advancement of Animal Breeding and Genetics, Perth, Australia, 19th - 21st July, 2011 | Source of Publication: | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.19, p. 95-98 | Publisher: | Association for the Advancement of Animal Breeding and Genetics (AAABG) | Place of Publication: | Armidale, Australia | ISSN: | 1328-3227 | Fields of Research (FoR) 2008: | 070201 Animal Breeding 070202 Animal Growth and Development |
Socio-Economic Objective (SEO) 2008: | 830308 Pigs | Peer Reviewed: | Yes | HERDC Category Description: | E1 Refereed Scholarly Conference Publication | Publisher/associated links: | http://trove.nla.gov.au/work/162660639 http://www.aaabg.org/aaabg19/ |
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Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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