Based on the results from Tables 1,2 and 3 we can conclude that the treatment of in vitro seedlings is the most effective way to induce tetraploidy in azalea in vitro.However, compared to the ‘direct sowing’ method it is more labour consuming.
Moreover, both of these methods attempt to induce polyploidy from an ‘unknown’ genotype (a seedling). It would be more interesting to induce polyploidy starting from a commercially available cultivar; not only would this allow a better comparison between diploid and tetraploid, but the tetraploid would also have a greater chance of being of commercial value (since it can be expected to inherit many beneficial characteristics from the original diploid).