TABLE 1

Expectation (ε(X)), variance (Embedded Image(X)), and conditional expectation (ε(X | QTL i)) of the contrast between the two homozygous marker classes at the position of QTL i and conditional expectation (ε(X | QTL i × QTL j)) of the interaction between the two homozygous marker classes at the positions i and j for X = Z1, Z2, Z3, and H3 in terms of genetic effects of the F2-metric under digenic epistasis in the absence of linkage

Statistica
Variable Xε(X)Embedded Imageε(X | QTL i)ε(X | QTL i × QTL j)
Z1Embedded ImageEmbedded ImageEmbedded Imageaaij + ddij
Z2Embedded ImageEmbedded ImageEmbedded Imageadij + daij
Z3Embedded ImageEmbedded ImageEmbedded Image2ddij
H3μEmbedded Imageaiaaij
  • For description of Z1, Z2, Z3, and H3 and for notation of genetic effects see materials and methods.

  • a Summation is over the entire set of QTL involved in the trait expression.