“…Higher vigour and tuber yield advantage were reported with tetraploid (2n = 80) and triploid (2n = 60) water yam compared to its diploid (2n = 40) counterpart (Arnau et al, ; Lebot, ). The positive effect of artificially induced polyploid on chlorophyll content, leaf shape, and stomata density, plant width, and fruit set has been reported in water yam (Abraham, Nemorin, & Lebot, ; Ajayi, Adesoye, Asiedu, & Sartie, ; Babil et al, ). Kenji, Ohara, and Iwasa () reported a shorter and thicker vine in D. japonica with artificially induced tetraploid.…”