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A classical setting for associations between markers and loci affecting quantitative traits

Published online by Cambridge University Press:  01 December 1999

DAHLIA M. NIELSEN  and
B. S. WEIR
DAHLIA M. NIELSEN
Affiliation:
Program in Statistical Genetics, Department of Statistics, North Carolina State University, Raleigh, NC 27695-8203, USA
B. S. WEIR
Affiliation:
Program in Statistical Genetics, Department of Statistics, North Carolina State University, Raleigh, NC 27695-8203, USA
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Abstract

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We examine the relationships between a genetic marker and a locus affecting a quantitative trait by decomposing the genetic effects of the marker locus into additive and dominance effects under a classical genetic model. We discuss the structure of the associations between the marker and the trait locus, paying attention to non-random union of gametes, multiple alleles at the marker and trait loci, and non-additivity of allelic effects at the trait locus. We consider that this greater-than-usual level of generality leads to additional insights, in a way reminiscent of Cockerham's decomposition of genetic variance into five terms: three terms in addition to the usual additive and dominance terms. Using our framework, we examine several common tests of association between a marker and a trait.

Type
Research Article
Information
Genetics Research , Volume 74 , Issue 3 , December 1999 , pp. 271 - 277
Copyright
1999 Cambridge University Press