Experiment 2.
This experiment is conducted to evaluate the stability of chromosomes in the induced polyploid plants during cultivation. Any change of the chromosome ploidy levels during the cultivation of the induced tetraploid plants of Phal. aphrodite subsp. formosana and Phalaenopsis bellina (as identified in the section “C” of the experiment 1 above) obtained from the diploid Phal. aphrodite subsp. formosana and Phalaenopsis bellina (as disclosed in the section “A” of the experiment 1 above) are used as an indicator of the stability level.