Minisett Technology and Yam Sprouting: A Comparative Study of Variety-specific Responses in Different Media

Abstract

Yam minisett technology is critical for addressing yam seed scarcity and improving tubers health and yields compared to traditional propagation methods. This study evaluated the effects of three growth media on three yam varieties using the minisett technique during the 2024 cropping season at the University for Development Studies, Nyankpala Campus, Ghana. The experimental design was replicated thrice per yam variety and growth media with sprouting parameters recorded at seven-day intervals for 35 days. Non- Sprouting setts and rots per basket were also recorded. Data were analyzed using Analysis of Variance (ANOVA) in GenStat with means separated by Fisher’s protected method at p<0.05. The yam varieties -Chencito, Laribako, and Pona- were sourced from Savannah Region. Minisetts weighed from 25-30g were treated with fungicide for 5-10mins before planting in growth media which include; Groundnut Husk Biochar (GHB), Rice Husk Biochar (RHB) and Sawdust (SawD). The Biochars were prepared using the KUNTAN apparatus and all minisetts were nursed under Zanamat shade and watered every three days. Results showed no significant interactive effect between media and variety on sprouting (Day 35: p=0.873), but both factors individually had highly significant effects. Chenchito consistently produced the highest sprouts counts from Day 14 to Day 35. GHB supported the best sprouting, likely due to its nitrogen-fixing properties. Conversely, Pona recorded the highest rots, particularly in sawdust which retained excess moisture and favored fungal and bacterial growth.