Heritability of polychotomous characters.
Characters with phenotypic expression consisting of a response in one of several mutually exclusive and exhaustive categories are considered. Formulae relating heritability in the discrete, outward scale to heritability in underlying normal and exponential scales are presented. For the normal case with two response categories, results reduce to the well-known formula for heritability of binary traits.
Gianola
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Department of Animal Science, University of Illinois, Urbana 61801.