Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering
Genetic diversity in maize is a valuable natural resource and plays a key role in hybrid breeding programs. The present study was conducted to assess the magnitude of genetic diversity among 107 tropical maize (Zea mays L.) inbred lines using phenotypic traits. Significant variability was observed f...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
ScienceDomain International
2025
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/178388 |
| _version_ | 1855527087165669376 |
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| author | Sharanu S G Patil, Ayyanagouda Kuchanur, Prakash B. Kisan Yeri, Sharanabasappa B Vinayan, Madhumal Thayil Zaidi, Pervez H. |
| author_browse | B. Kisan Kuchanur, Prakash Patil, Ayyanagouda Sharanu S G Vinayan, Madhumal Thayil Yeri, Sharanabasappa B Zaidi, Pervez H. |
| author_facet | Sharanu S G Patil, Ayyanagouda Kuchanur, Prakash B. Kisan Yeri, Sharanabasappa B Vinayan, Madhumal Thayil Zaidi, Pervez H. |
| author_sort | Sharanu S G |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genetic diversity in maize is a valuable natural resource and plays a key role in hybrid breeding programs. The present study was conducted to assess the magnitude of genetic diversity among 107 tropical maize (Zea mays L.) inbred lines using phenotypic traits. Significant variability was observed for all the 11 traits. Days to 50% tasseling (DFT), days to 50% silking (DFS), plant height (PH), ear height (EH), cob length (CL), cob girth (CG), kernel rows per cob (KRPC), kernel per row (KPR), shelling percent (SP), seed weight (SW) and grain yield (GY). High heritability and genetic advance were observed for the traits Viz., DFT, DFS, CL, CG and KRPC, indicating their suitability for effective selection. In contrast, traits like GY, SP, and SW showed low heritability, suggesting stronger environmental influence and the need to exploit heterosis for yield improvement. Cluster analysis of inbred lines grouped them into seven distinct clusters, with considerable inter-cluster distances, particularly between Cluster II and V. Principal component analysis (PCA) revealed that the first five PCA components explained over 80% of the total variation. Potential genetically diverse genotypes Viz., CIMMYT-19, BHG-19, UASBM-69 and AHG-76-1 were identified by the PCA biplot as promising sources for hybridization. Overall, the results showed the importance of flowering and cob-related traits for selection and demonstrate the combined utility of cluster analysis and PCA in identifying diverse parental lines, thereby providing a strong foundation for hybrid development and genetic improvement of maize. |
| format | Journal Article |
| id | CGSpace178388 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | ScienceDomain International |
| publisherStr | ScienceDomain International |
| record_format | dspace |
| spelling | CGSpace1783882025-11-29T02:08:55Z Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering Sharanu S G Patil, Ayyanagouda Kuchanur, Prakash B. Kisan Yeri, Sharanabasappa B Vinayan, Madhumal Thayil Zaidi, Pervez H. genetic diversity (resource) inbred lines principal component analysis polymorphism Genetic diversity in maize is a valuable natural resource and plays a key role in hybrid breeding programs. The present study was conducted to assess the magnitude of genetic diversity among 107 tropical maize (Zea mays L.) inbred lines using phenotypic traits. Significant variability was observed for all the 11 traits. Days to 50% tasseling (DFT), days to 50% silking (DFS), plant height (PH), ear height (EH), cob length (CL), cob girth (CG), kernel rows per cob (KRPC), kernel per row (KPR), shelling percent (SP), seed weight (SW) and grain yield (GY). High heritability and genetic advance were observed for the traits Viz., DFT, DFS, CL, CG and KRPC, indicating their suitability for effective selection. In contrast, traits like GY, SP, and SW showed low heritability, suggesting stronger environmental influence and the need to exploit heterosis for yield improvement. Cluster analysis of inbred lines grouped them into seven distinct clusters, with considerable inter-cluster distances, particularly between Cluster II and V. Principal component analysis (PCA) revealed that the first five PCA components explained over 80% of the total variation. Potential genetically diverse genotypes Viz., CIMMYT-19, BHG-19, UASBM-69 and AHG-76-1 were identified by the PCA biplot as promising sources for hybridization. Overall, the results showed the importance of flowering and cob-related traits for selection and demonstrate the combined utility of cluster analysis and PCA in identifying diverse parental lines, thereby providing a strong foundation for hybrid development and genetic improvement of maize. 2025-10-18 2025-11-28T22:08:34Z 2025-11-28T22:08:34Z Journal Article https://hdl.handle.net/10568/178388 en Open Access application/pdf ScienceDomain International Sharanu, S. G., Patil, A., Kuchanur, P. H., Kisan, B., Yeri, S. B., Vinayan, M. T., & Zaidi, P. H. (2025). Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering. Journal of Advances in Biology & Biotechnology, 28(10), 1466–1477. https://doi.org/10.9734/jabb/2025/v28i103161 |
| spellingShingle | genetic diversity (resource) inbred lines principal component analysis polymorphism Sharanu S G Patil, Ayyanagouda Kuchanur, Prakash B. Kisan Yeri, Sharanabasappa B Vinayan, Madhumal Thayil Zaidi, Pervez H. Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title | Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title_full | Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title_fullStr | Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title_full_unstemmed | Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title_short | Genetic diversity of tropical maize (Zea mays L.) inbred lines using phenotypic clustering |
| title_sort | genetic diversity of tropical maize zea mays l inbred lines using phenotypic clustering |
| topic | genetic diversity (resource) inbred lines principal component analysis polymorphism |
| url | https://hdl.handle.net/10568/178388 |
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