Browsing by Author "Lyimo, Liberatus Dominick"

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Effects of genotype on yield and yield component of soybean (Glycine max (L) Merrill)
(2017) Lyimo, Liberatus Dominick; Tamba, Musa Rashid; Madege, Richard Raphael
In 2013, the multi-location trial was implemented to evaluate the new soybean genotypes for their agronomic performance against the local check. The experiment was conducted in three locations namely Ilonga, Kibaha, and Mlingano in each location a triplicated trial involving six genotypes of soybeans were implemented. The effects of genotype, location and genotype x environment interaction under combined analysis on agronomic yield, and soybean yield were found significant at P<0.05. The highest mean yield was found from TGX 1954-1Fand TGX 1908-8F in all locations. Correlations coefficient for seed yield revealed a positive and significant association with all agronomic yield except 100 seed weight in all locations. The phenotypic coefficient of variation and genotypic coefficient of variation estimates were significantly high for pods per plants (49.49/27.04), while crude protein had the lowest values (1.45/0.98). The finding also revealed that the differences between phenotypic coefficient of variation (PCV) and genetic coefficient of variation (GCV) were significantly lower for crude protein (0.45), followed by pod length (1.45) and 100 seed weight (2.6). The result suggests that the environment had less effect on the expression of these traits. Therefore, selection based on these traits might increase soybeans performance in all locations. The findings have demonstrated the stability of traits in different locations which is a useful information in soybean breeding programs. TGX 194-1F and TGX 1908-8F were genotypes with high crude protein content, and revealed stable performance across the three environments. TGX 1987-10F, TGX 1987-20F and TGX 1910-14F had better performance compared to Bossier.
Traditional knowledge and use of wild cowpeas (Vigna unguiculata) in selected communities of Tanzania
(Frontiers in Sustainable Food Systems, 2025) Godlove, John; Lyimo, Liberatus Dominick; Tryphone, George Muhamba; Hamisy, William; Zonneveld, Maarten van; N’Danikou, Sognigbé
Wild cowpeas are utilized as food, medicine, and nutritious fodder. However, there are limited reports on the cultural significance of wild cowpeas across different agroecologies of Tanzania. This study analyzed the traditional knowledge and identified the most culturally important species. The study involved 260 respondents interviewed from 13 villages in seven districts, using descriptive and ethnobotanical methods to assess traditional knowledge. Fisher’s exact test (p = 0.0403) revealed that knowledge of wild cowpeas depends on age, not gender and education. A Pearson’s test showed significant differences in use categories of wild cowpeas among the respondents, with 31% as animal fodder, 6% as medicine, 3.5% as food, and 2.5% as green manure, while 57% did not use it. Spearman rank correlations revealed positive correlations among the variables tested, with FC and UR significantly having a high correlation index of 0.98, while the cultural value (CVe) index highly correlated with all ethnobotany indices evaluated. Vigna dekindtiana is the most culturally significant species, with the highest frequency of citation (FCs = 20), use reports (URs = 27), and cultural importance (CIs = 1.125). The leaves of V. dekindtiana have been used as animal feed and vegetables, while its roots have been used to treat gastrointestinal disorders. This study revealed that wild cowpeas can be utilized in various ways, such as ecological and social aspects, and in breeding programs to improve cultivated cowpeas.