Unusual variation in Phaseolus vulgaris

Abstract

A rare natural mutation has been observed in a variety of Phaseolus vulgaris L. Normal coloured beans, apparently from a single pod, produced abnormal pure black beans. These reproduced themselves and gave rise to pure white beans, pure brown beans, and several types of bicoloured beans. Flower colour changed from violet to yellow and to white. Very few reversions were noted going back to main line parent beans of tan colour with black stripes.