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Journal of Dairy Science Vol. 83 No. 1 173-180
© 2000 by American Dairy Science Association ®
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Selective Genotyping to Detect Quantitative Trait Loci for Multiple Traits in Outbred Populations

H. Bovenhuis 1 and R. J. Spelman 1

1 Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen, The Netherlands

Selective genotyping (i.e., genotyping of individuals that are extreme for a quantitative trait) has been undertaken in many studies but has usually been limited to one trait of interest. This paper outlines the implications of selective genotyping when applied to a daughter design. Formulas are presented that enable unbiased estimation of QTL effects for the selectively genotyped and correlated traits. Formulas were verified using simulation. Further, formulas are presented to enable power calculations to be undertaken for the selectively genotyped trait and correlated traits. These algorithms are demonstrated with a numerical example.

Key Words: selective genotyping • correlated traits • quantitative trait loci

Submitted on March 4, 1999
Accepted on August 31, 1999




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