Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria
Proper understanding of the mode of gene action in open-pollinated varieties (OPVs) maize parents helps breeder in the choice of appropriate breeding method to improve its genetic value. The objectives of the present study were to determine gene action controlling grain yield and other agronomic tr...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Hapres
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/113576 |
| _version_ | 1855520826625884160 |
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| author | Akinwale, R.O. Eze, C.E. Traoré, D. Menkir, A. |
| author_browse | Akinwale, R.O. Eze, C.E. Menkir, A. Traoré, D. |
| author_facet | Akinwale, R.O. Eze, C.E. Traoré, D. Menkir, A. |
| author_sort | Akinwale, R.O. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Proper understanding of the mode of gene action in open-pollinated varieties (OPVs) maize parents helps breeder in the choice of appropriate breeding method to improve its genetic value. The objectives of the
present study were to determine gene action controlling grain yield and other agronomic traits of late maturing elite OPVs and classify the varieties into heterotic groups. Ninety-one hybrids generated from 14 elite OPV parents using diallel mating design were evaluated with their parents plus three commercial checks under marginal rainfall, drought, and optimal environments in Nigeria from 2017 to 2018. The experiment was laid out in a 9 × 12 alpha lattice with three replications in each environment. Results showed that there were significant mean squares for grain yield and most agronomic traits. Significant general combining ability (GCA) and specific combining ability (SCA) mean squares for some of the traits
indicated that additive and non-additive genetic gene actions were important in the inheritance of yield and those traits among this set of genotypes. However, non-additive genetic effects were more important
than additive for grain yield and other agronomic traits in all research environments. Only TZL Comp-3 C3 DT had significant and positive GCA effects (0.336*) while three hybrids had significant and positive SCA for grain yield across research environments. Because of the preponderance of non-additive gene action over additive gene action, distinct heterotic groups could not be identified but four tester groups were identified by HSGCA (Heterotic grouping based on Specific and General Combining Ability) and three groups by HGCAMT (Heterotic grouping based on the GCA of Multiple Traits). Results of grouping were not related to the endosperm colour but grouping based on HGCAMT was related to the pedigree of the varieties. In conclusion, this study has demonstrated preponderance of non-additive gene action over the additive gene action for all measured traits. The presence of the non-additive gene action present in the studied materials can enhance identification of outstanding varietal hybrids and population testers that can serve as base genetic materials for future maize improvement through reciprocal recurrent selection program in SSA. |
| format | Journal Article |
| id | CGSpace113576 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Hapres |
| publisherStr | Hapres |
| record_format | dspace |
| spelling | CGSpace1135762025-11-11T10:10:55Z Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria Akinwale, R.O. Eze, C.E. Traoré, D. Menkir, A. combining ability diallel analysis maize pollination food security nigeria Proper understanding of the mode of gene action in open-pollinated varieties (OPVs) maize parents helps breeder in the choice of appropriate breeding method to improve its genetic value. The objectives of the present study were to determine gene action controlling grain yield and other agronomic traits of late maturing elite OPVs and classify the varieties into heterotic groups. Ninety-one hybrids generated from 14 elite OPV parents using diallel mating design were evaluated with their parents plus three commercial checks under marginal rainfall, drought, and optimal environments in Nigeria from 2017 to 2018. The experiment was laid out in a 9 × 12 alpha lattice with three replications in each environment. Results showed that there were significant mean squares for grain yield and most agronomic traits. Significant general combining ability (GCA) and specific combining ability (SCA) mean squares for some of the traits indicated that additive and non-additive genetic gene actions were important in the inheritance of yield and those traits among this set of genotypes. However, non-additive genetic effects were more important than additive for grain yield and other agronomic traits in all research environments. Only TZL Comp-3 C3 DT had significant and positive GCA effects (0.336*) while three hybrids had significant and positive SCA for grain yield across research environments. Because of the preponderance of non-additive gene action over additive gene action, distinct heterotic groups could not be identified but four tester groups were identified by HSGCA (Heterotic grouping based on Specific and General Combining Ability) and three groups by HGCAMT (Heterotic grouping based on the GCA of Multiple Traits). Results of grouping were not related to the endosperm colour but grouping based on HGCAMT was related to the pedigree of the varieties. In conclusion, this study has demonstrated preponderance of non-additive gene action over the additive gene action for all measured traits. The presence of the non-additive gene action present in the studied materials can enhance identification of outstanding varietal hybrids and population testers that can serve as base genetic materials for future maize improvement through reciprocal recurrent selection program in SSA. 2021 2021-04-28T12:15:35Z 2021-04-28T12:15:35Z Journal Article https://hdl.handle.net/10568/113576 en Open Access application/pdf Hapres Akinwale, R.O., Eze, C.E., Traore, D. & Menkir, A. (2021). Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria. Crop Breeding, Genetics and Genomics, 3(1):e210003, 1-24. |
| spellingShingle | combining ability diallel analysis maize pollination food security nigeria Akinwale, R.O. Eze, C.E. Traoré, D. Menkir, A. Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title | Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title_full | Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title_fullStr | Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title_full_unstemmed | Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title_short | Detection of non-additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in Nigeria |
| title_sort | detection of non additive gene action within elite maize populations evaluated in contrasting environments under rainforest ecology in nigeria |
| topic | combining ability diallel analysis maize pollination food security nigeria |
| url | https://hdl.handle.net/10568/113576 |
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