Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines
Maize (Zea mays L.) is an important staple food crop in sub-Saharan Africa (SSA). The productivity of the crop is limited partly by the leaf blight disease caused by Exserohilum turcicum. In breeding for resistance to leaf blight, the germplasm needs to be well-characterized in order to design effic...
| Autores principales: | , , |
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
IntechOpen
2018
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/93043 |
| _version_ | 1855534596762894336 |
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| author | Wende, A. Shimelis, Hussein Gwata, E.T. |
| author_browse | Gwata, E.T. Shimelis, Hussein Wende, A. |
| author_facet | Wende, A. Shimelis, Hussein Gwata, E.T. |
| author_sort | Wende, A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Maize (Zea mays L.) is an important staple food crop in sub-Saharan Africa (SSA). The productivity of the crop is limited partly by the leaf blight disease caused by Exserohilum turcicum. In breeding for resistance to leaf blight, the germplasm needs to be well-characterized in order to design efficient breeding programs. This study evaluated the (i) genetic variability among maize inbred lines and (ii) diversity of selected medium to late maturity tropical maize inbred lines for hybrid breeding. Plants of 50 maize inbred lines were artificially inoculated in the field during 2011 and 2012. Disease severity and incidence as well as grain yield were measured. A subset of 20 elite maize inbred lines was genotyped using 20 SSR markers. The germplasm showed significant differences in reaction to leaf blight and were classified as either resistant or intermediate or susceptible. Mean disease severity varied from 2.04 to 3.25. Seven inbred lines were identified as potential sources of resistance to leaf blight for the genetic improvement of maize. The genotyping detected 108 alleles and grouped the inbred lines into five clusters consistent with their pedigrees. The genetic grouping in the source population will be useful in the exploitation of tropical maize breeding programs. |
| format | Book Chapter |
| id | CGSpace93043 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | IntechOpen |
| publisherStr | IntechOpen |
| record_format | dspace |
| spelling | CGSpace930432023-09-12T05:42:33Z Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines Wende, A. Shimelis, Hussein Gwata, E.T. inbred line maize pedigree leaf blight genetic variability resistance germplasm Maize (Zea mays L.) is an important staple food crop in sub-Saharan Africa (SSA). The productivity of the crop is limited partly by the leaf blight disease caused by Exserohilum turcicum. In breeding for resistance to leaf blight, the germplasm needs to be well-characterized in order to design efficient breeding programs. This study evaluated the (i) genetic variability among maize inbred lines and (ii) diversity of selected medium to late maturity tropical maize inbred lines for hybrid breeding. Plants of 50 maize inbred lines were artificially inoculated in the field during 2011 and 2012. Disease severity and incidence as well as grain yield were measured. A subset of 20 elite maize inbred lines was genotyped using 20 SSR markers. The germplasm showed significant differences in reaction to leaf blight and were classified as either resistant or intermediate or susceptible. Mean disease severity varied from 2.04 to 3.25. Seven inbred lines were identified as potential sources of resistance to leaf blight for the genetic improvement of maize. The genotyping detected 108 alleles and grouped the inbred lines into five clusters consistent with their pedigrees. The genetic grouping in the source population will be useful in the exploitation of tropical maize breeding programs. 2018 2018-06-05T15:28:41Z 2018-06-05T15:28:41Z Book Chapter https://hdl.handle.net/10568/93043 en Open Access application/pdf IntechOpen Wende, A., Shimelis, H. & Gwata, E.T. (2018). Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines. In M.A. El-Esawi, Maize germplasm-characterization and genetic approaches for crop improvement. London, UK: IntechOpen Limited, (p. 39-56). |
| spellingShingle | inbred line maize pedigree leaf blight genetic variability resistance germplasm Wende, A. Shimelis, Hussein Gwata, E.T. Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title | Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title_full | Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title_fullStr | Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title_full_unstemmed | Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title_short | Genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| title_sort | genetic variability for resistance to leaf blight and diversity among selected maize inbred lines |
| topic | inbred line maize pedigree leaf blight genetic variability resistance germplasm |
| url | https://hdl.handle.net/10568/93043 |
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