highly significantP< 0.0001
The FT-B1 alleles showed highly significant differences in heading time ( P< 0.0001) within both alleles of FT-A1 , but the differences between the adjusted means of the FT-B1 alleles were 34% larger in the lines homozygous for the mutant ft-A1 allele (25.0 day delay in flowering) than in the lines homozygous or heterozygous for the wild type FT-A1 allele (18.6 day delay).