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Other traits can be thought of as qualitative or
categorical traits. Examples include sex, brood, plot, etc. In some
cases these factors will have been ``regressed out'', that is a regression of the
quantitative trait of interest on the categorical trait will have been performed
and the residuals used as the phenotypes in the analysis.
Presently, they can be input via a file of filetype ``cross.inp'' but not
automatically analyzed. One includes these other traits in the regression
model by prepending a plus sign (+) to the other trait name. For example,
-Names of the other traits...
would incorporate a Sex effect in the regression model, while ignoring
the Line effect.