Predicting observed and latent responses to BLUP selection involving logistic variates

Genetics Selection Evolution

Elizabeth Le Bihan-Duval¹  Jean-Jacques Colleau² 

[1] Station de recherches avicoles, Institut national de la recherche agronomique 37380 Nouzilly, France;Station de génétique quantitative et appliquée, Institut national de la recherche agronomique 78352 Jouy-en-Josas Cedex, France

关键词: response;    selection;    BLUP;    logistic;   

Others  :  1094808
DOI  :  10.1186/1297-9686-32-3-265

 received in 1999-05-19, accepted in 2000-01-31,  发布年份 2000

【 摘 要 】

Multivariate BLUPs can be derived when data are a mixture of continuous traits and observed discrete traits controlled by logistic latent traits. Algorithms were developed for predicting discrete responses to BLUP selection, and latent responses when the selection process included additional culling on scores. These algorithms were Taylor expansions using well-known expressions such as the probabilities and the two first moments of the truncated multinormal distribution, after appropriate re-parametrizations. They were compared to very accurate quadrature integrations. The test examples were suggested by a situation found in chickens where selection can involve body weight and leg deformity described by two logistic latent variates. Quadratic Taylor expansions generally provided a good accuracy. Therefore, they could be recommended when quadrature methods are too demanding, e.g., for complex breeding schemes.

【 授权许可】

   
2000 INRA, EDP Sciences