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https://hdl.handle.net/1959.11/4139
Title: | Genetic analysis of feed intake in lactating sows | Contributor(s): | Hermesch, Susanne (author) | Publication Date: | 2007 | Handle Link: | https://hdl.handle.net/1959.11/4139 | Abstract: | Records for daily feed intake during lactation were available for 774 sows with 2,234 litters farrowing from May 2002 to November 2006. Genetic parameters were estimated for whole-of-lactation feed intake and feed intake averaged over 5-day periods during lactation. Estimates of heritabilities and the permanent environment of the sow were 0.16±0.05 and 0.18±0.04 for total lactation feed intake and 0.19±0.05 and 0.17±0.05 for average lactation feed intake. Both traits were adjusted for lactation length. Heritability estimates for lactation feed intake defined as separate traits for each of the first 3 parities ranged from 0.17 to 0.28. Genetic correlations between lactation feed intake recorded in different parities were 0.45±0.33 and lower suggesting that lactation feed intake of first parity gilts is genetically a different trait than lactation feed intake of sows recorded in later parities. Heritabilities for feed intake averaged over 5-day periods from day 6 to 20 of lactation were similar to total lactation feed intake. These 5-day period measures of average feed intake were genetically the same trait and had high genetic correlations with total lactation feed intake. The use of a 5-day measure of feed intake during the second or third week of lactation reduces costs of recording and should be explored further by evaluating genetic relationships with other performance traits. | Publication Type: | Conference Publication | Conference Details: | AAABG 2007: 17th Conference of the Association for the Advancement of Animal Breeding and Genetics, Armidale, Australia, 23rd - 26th September, 2007 | Source of Publication: | Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.17, p. 61-64 | 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 | Socio-Economic Objective (SEO) 2008: | 830308 Pigs | Peer Reviewed: | Yes | HERDC Category Description: | E1 Refereed Scholarly Conference Publication | Publisher/associated links: | http://www.aaabg.org/livestocklibrary/2007/hermesch061.pdf http://trove.nla.gov.au/work/35062558?selectedversion=NBD42373479 |
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Appears in Collections: | Animal Genetics and Breeding Unit (AGBU) Conference Publication |
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