The genetics of purple pigmentation studied in two crosses of a common parent for colour of stem, branches, petiole, leaf lamina, corolla, petal line and fruits in brinjal. Purple colour was observed to be dominant over the contrast colour in above parts of plant. The segregation in F2 was in a manner with the expected ratio in test cross generation for each character. The number and action of gene varied for colour of stem and fruit, respectively in two crosses of a common parent. The colour of leaf lamina and fruit was governed by four genes involving inhibitory genes of different actions. Pigmentation in stem, branches, petiole, corolla and petal line were governed by complementary actions of three or four genes.
