Colchicine induced chromosomal interchange and colchitetraploidy in Phlox drummondii

Young seedlings of Phlox drummondii were treated with colchicine. Plants showing characteristic features of interchange (translocation), and colchitetraploidy during meiosis were isolated. The interchange heterozygote exhibited a lot of variation in petal character and therefore these two characters appear to be correlated. The colchiploid exhibited usual characteristic features of autopolyploidy.