Abstract

The variegations seen inPlantago andCapsicum behave as recessives to normal green, but their true genetic nature is complicated. The white patches in the variegated leaves have green ticks. The mechanism involved in variegation consists in white patches resulting through exomutation of the green plastogene, and in green ticks by automutation of the white mutant plastogene. Almost white sports and white-over-green periclinal sports appear. In the course of sexual reproduction, retroversion to the apparently green condition takes place, so that white and periclinal branches or ears generally produce variegated seedlings.

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