Free Access
Genet. Sel. Evol.
Volume 39, Number 3, May-June 2007
Page(s) 249 - 265
Published online 14 April 2007
Genet. Sel. Evol. 39 (2007) 249-265
DOI: 10.1051/gse:2007002

A periodic analysis of longitudinal binary responses: a case study of clinical mastitis in Norwegian Red cows

Yu-mei Changa, Daniel Gianolaa, b, Bjørg Heringstadb, c and Gunnar Klemetsdalb

a  Department of Dairy Science, University of Wisconsin, Madison, USA
b  Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences
c  Geno Breeding and A. I. Association, Norway

(Received 14 February 2006; accepted 6 December 2006; published online 14 April 2007)

Abstract - A Bayesian procedure for analyzing longitudinal binary responses using a periodic cosine function was developed. It was assumed that, after adjustment for "seasonal" effects, the oscillation of the underlying latent variables for longitudinal binary responses was a stationary series. Based on this assumption, a single dimension sinusoidal analysis of longitudinal binary responses using the Gibbs sampling and Metropolis algorithms was implemented in a study of clinical mastitis records of Norwegian Red cows taken over five lactations.

Key words: clinical mastitis / periodic analysis / sinusoidal analysis / threshold model

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© INRA, EDP Sciences 2007