Marker: Name of visible marker. Follow this link for an explanation of gene symbols.
(#): Chromosome where visible marker is located.P: Percent recombination between EMB locus and visible marker. Follow *this link* for information on the Kosambi mapping function used to convert recombination percent into centiMorgans.
StdErr: Standard Error for percent recombination.Plants: Number of F2 plants screened for the visible marker and embryo phenotypes.
Chi: Internal chi-square calculation. This number gets smaller as the number of F2 plants observed in each phenotypic class approaches that predicted for the estimated distance between the two genes.A: Number of F2 plants in class "A" (VIS/-; EMB/EMB). This class should constitute 25% of the F2 plants if the 2 genes are unlinked; 0% if they are adjacent.
B: Number of F2 plants in class "B" (VIS/-; EMB/emb). This class should constitute 50% of the F2 plants if the 2 genes are unlinked; 67% if they are adjacent.C: Number of F2 plants in class "C" (vis/vis; EMB/EMB). This class should constitute 8% of the F2 plants if the 2 genes are unlinked; 33% if they are adjacent.
D: Number of F2 plants in class "D" (vis/vis; EMB/emb). This class should constitute 17% of the F2 plants if the 2 genes are unlinked; 0% if they are adjacent.E:F Ratio of plants in classes [A+B] / [C+D]. This ratio should approximate 3.0 if the 2 genes are unlinked; 2.0 if they are adjacent.
emb:+ Ratio of plants in classes [B+D] / [A+C]. This ratio should approximate 2.0 regardless of the distance between the 2 genes.Note: Follow this link for a listing of publications from the Meinke laboratory. The papers by Patton et al. (1991) and Franzmann et al. (1995) provide additional details on calculating recombination estimates and placing EMB genes on the classical genetic map.