A scheme for the genetic control of purple spathes in Anthurium is proposed. The recessive allele p modifies the color of anthocyanins controlled by the M and O loci. A spathe is purple when the genotype is M-O-pp. If the P locus is dominant, M-O- is red, while mmO - is orange. The p allele has no effect on the -00 (white) genotype.
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