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The frequency of marker changes in sugarcane saccharum plants regenerated from callus culture

, : The frequency of marker changes in sugarcane saccharum plants regenerated from callus culture. Plant Cell Tissue & Organ Culture 3(3): 201-210

Leaf tissue from 5 sugarcane clones with distinctive markers was cultured on a medium favoring callus growth. Transferred to a differentiation medium, calli produced > 5000 plants. Plants differentiated from 2 clones with stem markers exhibited a high rate of remission of the marker, but the marker reappeared in the vegetative progeny of these plants, and remission was, therefore, transient. Plants differentiated from callus from 2 clones with leaf markers showed a low rate of remission (2 or 3/1000) of the marker and the vegetative progeny was stable. A clone with variegated leaves produced plants with the majority having green leaves, some albino, and some variegated, suggesting that plant differentiation may start with > 1 cell. Permanent phenotypic change may result from tissue culture, but such changes are not frequent and may be confounded by temporary alterations by chimeras formed in the process of differentiation.

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