Angarawai, I I and Jerome, J and Adetomiwa, O-A and Yakubu, A and Bala, L and Bilyaminu, A (2025) Evaluation of Diverse Sorghum [Sorghum bicolor L. (Moench)] Genotypes for Drought Tolerance and Yield Performance in Nigeria. In: 5th International Conference on Drylands, 6-8 May 2025, Kano, Nigeria.
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Sorghum is a staple cereal crop in Nigeria, particularly valued for its adaptability to harsh environments and its importance in food security. With increasing climate variability and recurrent drought episodes, identifying drought-tolerant genotypes for adaptation and climate-smart variety development, which forms the objective of this study, is critical. 192 diverse range of early, medium, and late-maturing sorghum lines, with varying degrees of drought tolerance sourced from sorghum-growing countries across Africa were evaluated, aimed at identifying high-yielding, drought-tolerant genotypes that could also serve as parental lines in crop improvement. The experiment was conducted using an alpha lattice design with two replications. Data were collected on agronomic, yield, and drought-tolerance traits and analyzed statistically. The collections were clustered, and correlation matrices, biplots, and scatterplots were used to determine trait contributions and classify genotypes. Four major clusters were identified at a Euclidean distance of 0.2. Correlation analysis revealed strong associations between grain yield and both panicle weight and panicle length (r = 0.96). Plant height showed a significant positive correlation with days to maturity (r=1), but a neutral association with yield—suggesting that taller plants require longer growth periods without necessarily improving productivity. Box plot and scatter plot analyses revealed a wide range of grain yield across maturity groups (<500 to~2000 kg/ha), with medium-maturing genotypes achieving the highest median yield (1100 kg/ha)and the broadest yield range. Extra-early and early maturing genotypes had moderate but more uniform yields, indicating a relationship between earliness and productivity. In contrast, late-maturing genotypes exhibited very high yield variability. Variability was also observed in stay-green expression, a key drought-related trait. Notably, genotypes ICSV 246167, ICSV 246160, ICSV 246011, and ICSV 246145 were identified as promising parental lines for developing improved, drought-resilient sorghum varieties.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Divisions: | Research Program : West & Central Africa |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Sorghum, Drought tolerance, Climate Smart, Genetic Diversity |
| Subjects: | Others > Climate Smart Agriculture (CSA) Others > Drought Tolerance Others > Genetic Engineering Mandate crops > Sorghum |
| Depositing User: | Mr Nagaraju T |
| Date Deposited: | 03 Nov 2025 06:16 |
| Last Modified: | 03 Nov 2025 06:16 |
| URI: | http://oar.icrisat.org/id/eprint/13384 |
| Acknowledgement: | UNSPECIFIED |
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