In a previous paper 1 the occurrence, as a mutant.of a sorghum plant with brownish purple-lined internode.leaf-sheath.midrib.panicle branch,anf glume top has been recorded.The pigment was not anthocyanic.This mutant behaved as a simple recessice to the common more economic green internoded and white midribbed plant.A factor mtb gives a mechanical tissue coloured brownish purple.Mtb gives the ordinary green internode of the cpmmon sorghum.
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