Abstract
Presently, 14 populations of Ageratum conyzoides L. have been meiotically studied from different geographical regions of Rajasthan. Of which, five populations are at tetraploid level (2n=40) and the remaining nine at diploid level (2n=20). Morphologically, populations vary on the basis of the floret color (from light purple to white). Meiosis of five populations i.e., three diploid cytotypes and two tetraploid cytotypes exhibit abnormalities like, early disjunction of bivalents, univalents, laggards, chromatin bridges, abnormal microsporogenesis and low pollen fertility.
