Ezeaku, I E and Angarawai, I I and Okechukwu, E (2025) Genetic variability studies for quantitative traits in pearl millet (Pennisetum glaucum L.) mapping population and maintainer lines under different phosphorus fertilizer rates in Sudano Sahelian Agro-Ecology of Nigeria. African Journal of Biotechnology, 24 (11). pp. 256-268. ISSN 1684-5315
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Abstract
Low soil Phosphorus is considered to be one of the major limiting factors to pearl millet production in sub-Saharan Africa (SSA). This study seeks to establish the extent of genetic variability in the pearl millet mapping population and maintainers under varying levels of phosphorus. A set of twenty-four pearl millet mapping population and maintainer lines were evaluated at the International Institute of Tropical Agriculture (IITA) Minjibir experimental station under two levels of Phosphorus application to determine the genotype responses and to identify major traits involved in Phosphorus tolerance. The experiment was laid out in an alpha lattice with three replications. Analysis of variance revealed significant differences for all 11 characters studied. The study identified phosphorus-tolerant lines, P1449-2, PT732B-P2, ICMB 89111, ICMB 90111, and susceptible lines; H77/833-2 P5 (NT), Tift 186, and H77/833-2 (reselected), which could be utilized in developing QTLs to aid in marker-assisted breeding. Phosphorus fertilizer application resulted in significantly higher grain and grain yield components. Phosphorus application significantly increased heritability and genetic advance values in most of the yield and yield components. High heritability (60.12) coupled with high genetic advance (317.56) was found for head weight, followed by grain weight with high heritability (44.45) and high genetic advance (99.46), indicating that most likely the heritability is due to additive gene effects, and selection based on these characters would be effective for further pearl millet mapping population improvement program.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : West & Central Africa |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Pearl millet, phosphorus, heritability, genetic advance, quantitative trait loci, marker-assisted selection |
| Subjects: | Mandate crops > Millets > Pearl Millet Others > Semi-Arid Tropics Others > Genetics and Genomics |
| Depositing User: | Mr Nagaraju T |
| Date Deposited: | 24 Nov 2025 05:15 |
| Last Modified: | 24 Nov 2025 05:15 |
| URI: | http://oar.icrisat.org/id/eprint/13394 |
| Official URL: | https://academicjournals.org/journal/AJB/article-f... |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | The authors thank ICRISAT Corporate Headquarters, Patancheru, India, for providing the materials for this research. |
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