Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids
Background The establishment of heterotic groups of inbred lines is crucial for hybrid maize breeding programs. Currently, there is no information on the heterotic patterns of the Provitamin A (PVA) inbred lines developed in the maize improvement program of the International Institute of Tropical Ag...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/132395 |
| _version_ | 1855537878461841408 |
|---|---|
| author | Sayadi Maazou, A.R. Gedil, M. Adetimirin, V. Unachukwu, N. Mengesha Abera, W. Meseka, S.K. Menkir, A. |
| author_browse | Adetimirin, V. Gedil, M. Mengesha Abera, W. Menkir, A. Meseka, S.K. Sayadi Maazou, A.R. Unachukwu, N. |
| author_facet | Sayadi Maazou, A.R. Gedil, M. Adetimirin, V. Unachukwu, N. Mengesha Abera, W. Meseka, S.K. Menkir, A. |
| author_sort | Sayadi Maazou, A.R. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Background
The establishment of heterotic groups of inbred lines is crucial for hybrid maize breeding programs. Currently, there is no information on the heterotic patterns of the Provitamin A (PVA) inbred lines developed in the maize improvement program of the International Institute of Tropical Agriculture (IITA) to form productive PVA enriched hybrids for areas affected by vitamin A deficiency. This study assessed the feasibility of classifying PVA-enriched inbred lines into heterotic groups based on PVA content without compromising grain yield in hybrids. Sixty PVA inbred lines were crossed to two testers representing two existing heterotic groups. The resulting 120 testcrosses hybrids were evaluated for two years at four locations in Nigeria.
Results
The two testers effectively classified the inbred lines into two heterotic groups. The PVA-based general combining ability and specific combining ability (HSGCA) method assigned 31 and 27 PVA enriched maize inbred lines into HGB and HGA, respectively, leaving two inbred lines not assigned to any group. The yield-based HSGCA method classified 32 inbred lines into HGB and 28 inbred lines into HGA. Both PVA and yield-based heterotic grouping methods assigned more than 40% of the inbred lines into the same heterotic groups. Even though both PVA and yield-based heterotic grouping of the inbred lines differed from the clusters defined by the DArTag SNP markers, more than 40% of the inbred lines assigned to HGA were present in Cluster-1 and 60% of the inbred lines assigned to HGB were present in Cluster-3. Interestingly, the inbred lines assigned to the same heterotic groups based on PVA content and grain yield were distributed across the three Ward’s clusters. The PVA-based HSGCA was identified as the most effective heterotic grouping method for breeding programs working on PVA biofortification.
Conclusions
Selecting PVA enriched maize inbred lines with diverse genetic backgrounds from the three marker-based clusters may facilitate the development of productive hybrids with high PVA content and for generating source populations to develop more vigorous maize inbred lines with much higher concentrations of PVA. |
| format | Journal Article |
| id | CGSpace132395 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1323952025-11-11T10:44:35Z Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids Sayadi Maazou, A.R. Gedil, M. Adetimirin, V. Unachukwu, N. Mengesha Abera, W. Meseka, S.K. Menkir, A. heterotic groups genetic diversity maize provitamins inbred lines Background The establishment of heterotic groups of inbred lines is crucial for hybrid maize breeding programs. Currently, there is no information on the heterotic patterns of the Provitamin A (PVA) inbred lines developed in the maize improvement program of the International Institute of Tropical Agriculture (IITA) to form productive PVA enriched hybrids for areas affected by vitamin A deficiency. This study assessed the feasibility of classifying PVA-enriched inbred lines into heterotic groups based on PVA content without compromising grain yield in hybrids. Sixty PVA inbred lines were crossed to two testers representing two existing heterotic groups. The resulting 120 testcrosses hybrids were evaluated for two years at four locations in Nigeria. Results The two testers effectively classified the inbred lines into two heterotic groups. The PVA-based general combining ability and specific combining ability (HSGCA) method assigned 31 and 27 PVA enriched maize inbred lines into HGB and HGA, respectively, leaving two inbred lines not assigned to any group. The yield-based HSGCA method classified 32 inbred lines into HGB and 28 inbred lines into HGA. Both PVA and yield-based heterotic grouping methods assigned more than 40% of the inbred lines into the same heterotic groups. Even though both PVA and yield-based heterotic grouping of the inbred lines differed from the clusters defined by the DArTag SNP markers, more than 40% of the inbred lines assigned to HGA were present in Cluster-1 and 60% of the inbred lines assigned to HGB were present in Cluster-3. Interestingly, the inbred lines assigned to the same heterotic groups based on PVA content and grain yield were distributed across the three Ward’s clusters. The PVA-based HSGCA was identified as the most effective heterotic grouping method for breeding programs working on PVA biofortification. Conclusions Selecting PVA enriched maize inbred lines with diverse genetic backgrounds from the three marker-based clusters may facilitate the development of productive hybrids with high PVA content and for generating source populations to develop more vigorous maize inbred lines with much higher concentrations of PVA. 2023 2023-10-24T09:33:10Z 2023-10-24T09:33:10Z Journal Article https://hdl.handle.net/10568/132395 en Open Access application/pdf Springer Sayadi Maazou, A.R., Gedil, M., Adetimirin, V., Unachukwu, N., Mengesha Abera, W., Meseka, S.K., & Menkir, A. (2023). Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids. BMC Genomic Data, 24:57, 1-8. |
| spellingShingle | heterotic groups genetic diversity maize provitamins inbred lines Sayadi Maazou, A.R. Gedil, M. Adetimirin, V. Unachukwu, N. Mengesha Abera, W. Meseka, S.K. Menkir, A. Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title | Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title_full | Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title_fullStr | Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title_full_unstemmed | Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title_short | Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids |
| title_sort | heterotic grouping of provitamin a enriched maize inbred lines for increased provitamin a content in hybrids |
| topic | heterotic groups genetic diversity maize provitamins inbred lines |
| url | https://hdl.handle.net/10568/132395 |
| work_keys_str_mv | AT sayadimaazouar heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT gedilm heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT adetimirinv heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT unachukwun heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT mengeshaaberaw heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT mesekask heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids AT menkira heteroticgroupingofprovitaminaenrichedmaizeinbredlinesforincreasedprovitaminacontentinhybrids |