In a previous article (Rangaswami Ayyangar and Krishna Rao,1931)three major types of purpe pigmeted plants have been described and their inheritance worked out.they are Purple,Dilute Purple and Localised Purple.In a subsequent article (Rangaswami Ayyangar,et al.,1933)a fourth type,Medium Purple was described.The mode of inheritance of all these types of Purple has been given.Factors P.I1,I 2,H1 and H2 are involved in the above.The commonest type of Purple Pigmented Ragi is of the genetic constitution P=I1 I2 H1 H2.
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