The value of feed consumption data for breeding in laying hens

P. Luiting

Research output: Thesisinternal PhD, WU

Abstract

<p>The results of statistical and experimental analyses of residual feed consumption (RFC) in White Leghorn laying hens are presented. RFC is defined as the difference between the observed feed consumption of a hen and its feed consumption predicted from its egg mass production, body weight gain and metabolic body weight. Variation in RFC was found to be related to differences in maintenance requirements in literature. High-low sampling studies with respect to RFC confirmed this, and showed that differences in physical activity, feather quality and basal matabolic rate were the most important variation sources. Optimum regression models were derived, and used to analyse RFC data statistically. Systematic and permanent phenotypic and additive genetic variation was found, confirming the findings of the experimental studies. The consequences for breeding for net feed efficiency are discussed.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Supervisors/Advisors
  • Brascamp, E.W., Promotor, External person
  • Verstegen, Martin, Promotor
Award date4 Jun 1991
Place of PublicationS.l.
Publisher
Publication statusPublished - 1991

Keywords

  • animal feeding
  • hens
  • selective breeding
  • feeds
  • composition
  • cum laude

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