Abstract
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.
