The transformation of heterochromatic property to an euchromatic property-Deheterochromatinization-was found in certain chromosomes of Spiranthes sinensis (2n=30). The deheterochromatinized chromosomes are genetically homologous to their progenitorial chromosomes which have a small heterochromatic segment. The deheterochromatinization has a genetic influence in increasing the size of organs.
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PYUSO TANAKA (1969) studied this question.
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