Abstract
Higher polysomic constitutions occur very rarely among plants and animals and whenever they arise are constitutionally weak and usually highly sterile. A quadruple trisomic (2n=24, 2n+1+1+1+1) chromosomal constitution has been reported for the first time from among the selfed progeny of a spontaneous autotriploid (2n=30). Coix lacryma-jobi.
Large number of PMCs showing four trivalents at diakinesis confirmed its quadruple trisomic nature. Inspite of polysomy this aneuploid is healthy and partly fertile.
