A study of dominance at the locus controlling cyanoglucoside production in Trifolium repens L.

Summary The Ac allele for cyanoglucoside production in white clover has been shown to be incompletely dominant and a dosage effect is indicated at this locus. The recessive allele, ac, when homozygous gives rise to absence of cyanoglucosides in the leaf tissue, whereas in heterozygous plants it has been shown to reduce the level of cyanoglucoside, to a level less than half the value found in Ac Ac plants.