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Title: Feeding level influences genetic parameters for performance traits in pigs
Contributor(s): Hermesch, Susanne  (author)orcid ; Luxford, B G (author); Graser, H U  (author)
Publication Date: 2002
Open Access: Yes
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Selection for performance traits is assumed to influence underlying physiological mechanisms, although these changes are not always fully understood. Knowledge about physiological changes may be used to optimise selection strategies for different production and market systems. One way in achieving this is by incorporating information on growth models into breeding programs. The concept of the linear-plateau model has been used in a number of growth models for some time (eg. De Greef, 1992). This concept provides an explanation why pigs differ in growth performance at a given feed intake level depending on their potential for lean meat growth (eg Whittemore, 1986).

Selection experiments comparing ad libitum versus restricted feeding systems indicate that restricted feeding improves feed efficiency by favouring lean meat deposition over fat deposition. In addition, pigs selected under restricted feeding had higher growth rate, larger feed intake and lower backfat measurements under ad libitum feeding (e.g. McPhee et al., 1988; Cameron and Curran, 1995). Genetic parameters obtained from commercial pig populations provide partial support for these genetic relationships (Hermesch et al., 1999). The development of electronic feeders allows testing of siblings on different feeding levels in the same environment. This data structure enables estimation of heritabilities for performance traits over varying feed intake levels. It also allows investigation of the effect of different feeding levels on genetic parameters for performance traits.

Publication Type: Conference Publication
Conference Details: WCGALP 2002: 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, 19th - 23rd August, 2002
Source of Publication: Proceedings of the World Congress on Genetics Applied to Livestock Production, 2002(Session 3), p. 1-4
Publisher: Massey University
Place of Publication: Palmerston North, New Zealand
Fields of Research (FoR) 2008: 070201 Animal Breeding
Fields of Research (FoR) 2020: 300305 Animal reproduction and breeding
Socio-Economic Objective (SEO) 2008: 830308 Pigs
Socio-Economic Objective (SEO) 2020: 100410 Pigs
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Conference Publication

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