The mean palmitic acid contents of the three phenotypic classes were compared and used to calculate gene substitution values to determine if there was additive or partial dominance inheritance at the segregating loci (Table 3).
Gene substitution values of fap1, fapx, and fan from five soybean [F.sub.2] populations.
Use of gene substitution values to quantify partial dominance in low palmitic acid soybean.
It follows that the relative values of gene substitution at this locus will be 50%.
The values of the palmitic acid levels for ELLP2, C1726, Elgin 87, and Century grown in the same environment (Table 2) were used as a basis for predicting the values of gene substitution for both Fap* and Fap1 loci.
Genotype Ratio Phenotype g [kg.sup.-1] Fap*Fap*Fap1Fap1 (Century, Elgin 87) 1 113([dagger]) Fap*Fap*Fap1fap1 2 98.5 (113 - 14.5) Fap*Fap*fap1fap1 (C1726) 1 84 Fap*fap*Fap1Fap1 2 97.9 (113 - 15.2) Fap*fap*Fap1fap1 4 83.4 (113 - 14.5 - 15.1) Fap*fap*fap1fap1 2 68.9 (84 - 1.5.1) fap*fap*Fap1Fap1 (ELLP2) 1 69 fap*fap*Fap1fap1 2 54.5 (69 - 14.5) fap*fap*fap1fap1 1 40 (69 - 14.5 - 14.5) ([dagger]) Numbers in italics were observed palmitic acid values (Table 2); all others were calculated on the basis of gene substitution values.