Anthocyanin polymorphisms in Mimulus guttatus

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Abstract
Three anthocyanin polymorphisms in M. guttatus DC. were described and analyzed genetically. These involved leaf blotches, calyx dots and general deposition of anthocyanin. In the case of leaf blotches, 2 plants with sharply contrasting leaf blotches were analyzed, and the blotch phenotype in each was due to the same gene, probably the dominant gene identified in a previous study, here called L. (The difference between the plants must be ascribed to other complex genetic modifiers.) The presence or absence of calyx dots was due to a pair of alleles, C (presence) and c (absence). the presence or absence of general anthocyanin deposition in the stems, petioles and calyces is controlled by the alleles A (presence) and a (absence). Whereas the expression of L is less in warm conditions, the expression of A is enhanced by exposure to the sun.

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