comb.indices            Construction of selection indices based on
                        number of character grouping
gen.varcov              Genotypic Variance-Covariance Analysis
phen.varcov             Phenotypic Variance-Covariance Analysis
sel.index               Construction of Selection Index
sel.score.rank          Analysis of selection score and
                        Genotype/Progeny ranking based on selection
                        score
seldata                 Selection Index DataSet
weight                  Weight dataset
weight.mat              Convert dataframe to matrix
