Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments
Vitamin A deficiency, drought, low soil nitrogen (low N) and Striga hermonthica parasitism of maize (Zea mays L.) cause malnutrition and food insecurity in sub-Saharan Africa. The objectives of this study were to determine combining abilities of extra-early provitamin A (PVA) lines, classify them in...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Wiley
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/104027 |
| _version_ | 1855524386212151296 |
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| author | Badu-Apraku, Baffour Fakorede, M.A.B. Talabi, A.O. Oyekunle, M. Aderounmu, M. Lum, A.F. Ribeiro, P.F. Adu, G.B. Toyinbo, J.O. |
| author_browse | Aderounmu, M. Adu, G.B. Badu-Apraku, Baffour Fakorede, M.A.B. Lum, A.F. Oyekunle, M. Ribeiro, P.F. Talabi, A.O. Toyinbo, J.O. |
| author_facet | Badu-Apraku, Baffour Fakorede, M.A.B. Talabi, A.O. Oyekunle, M. Aderounmu, M. Lum, A.F. Ribeiro, P.F. Adu, G.B. Toyinbo, J.O. |
| author_sort | Badu-Apraku, Baffour |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Vitamin A deficiency, drought, low soil nitrogen (low N) and Striga hermonthica parasitism of maize (Zea mays L.) cause malnutrition and food insecurity in sub-Saharan Africa. The objectives of this study were to determine combining abilities of extra-early provitamin A (PVA) lines, classify them into heterotic groups (HGs), identify testers, and determine yield stability of hybrids under contrasting environments in two trials. In trial 1, 20 extra-early PVA lines were inter-mated in a diallel mating scheme to obtain 190 F1 hybrids. The 190 F1 hybrids plus six checks were tested under Striga infestation, drought, and stress-free environments in Nigeria from 2015 to 2017. In trial 2, 35 extra-early yellow hybrids were evaluated under low-N, Striga-infested and stress-free environments in 2018. Provitamin A concentrations of 23.98 and 22.56 μg g-1 were obtained for TZEEIOR 202 and TZEEIOR 205. TZEEIOR 197 × TZEEIOR 205 (20.1 μg g-1) and TZEEIOR 202 × TZEEIOR 205 (22.7 μg g-1) contained about double the PVA level of the commercial check, TZEEI 58 × TZEE-Y Pop STR C5 (11.4 μgg-1). Both general (GCA) and specific (SCA) combining ability variances were statistically significant for most agronomic traits, although GCA was much larger than SCA effects, indicating that additive genetic effects primarily controlled the inheritance of those traits. TZEEIOR 97 and TZEEIOR 197 were identified as inbred testers. TZEEIOR 197 × TZEEIOR205 (20.1 μg g-1) was identified as a single-cross tester as well as the most stable and highest-yielding hybrid across environments. TZEEIOR 202 and TZEEIOR 205 should be invaluable resources for breeding for high PVA. PVA level was independent of hybrid yield potential, indicating that selection of superior hybrids with elevated PVA levels should be feasible. |
| format | Journal Article |
| id | CGSpace104027 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1040272025-11-11T10:16:11Z Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments Badu-Apraku, Baffour Fakorede, M.A.B. Talabi, A.O. Oyekunle, M. Aderounmu, M. Lum, A.F. Ribeiro, P.F. Adu, G.B. Toyinbo, J.O. maize food security drought tolerance striga striga hermonthica subsaharan africa genetics inbred lines Vitamin A deficiency, drought, low soil nitrogen (low N) and Striga hermonthica parasitism of maize (Zea mays L.) cause malnutrition and food insecurity in sub-Saharan Africa. The objectives of this study were to determine combining abilities of extra-early provitamin A (PVA) lines, classify them into heterotic groups (HGs), identify testers, and determine yield stability of hybrids under contrasting environments in two trials. In trial 1, 20 extra-early PVA lines were inter-mated in a diallel mating scheme to obtain 190 F1 hybrids. The 190 F1 hybrids plus six checks were tested under Striga infestation, drought, and stress-free environments in Nigeria from 2015 to 2017. In trial 2, 35 extra-early yellow hybrids were evaluated under low-N, Striga-infested and stress-free environments in 2018. Provitamin A concentrations of 23.98 and 22.56 μg g-1 were obtained for TZEEIOR 202 and TZEEIOR 205. TZEEIOR 197 × TZEEIOR 205 (20.1 μg g-1) and TZEEIOR 202 × TZEEIOR 205 (22.7 μg g-1) contained about double the PVA level of the commercial check, TZEEI 58 × TZEE-Y Pop STR C5 (11.4 μgg-1). Both general (GCA) and specific (SCA) combining ability variances were statistically significant for most agronomic traits, although GCA was much larger than SCA effects, indicating that additive genetic effects primarily controlled the inheritance of those traits. TZEEIOR 97 and TZEEIOR 197 were identified as inbred testers. TZEEIOR 197 × TZEEIOR205 (20.1 μg g-1) was identified as a single-cross tester as well as the most stable and highest-yielding hybrid across environments. TZEEIOR 202 and TZEEIOR 205 should be invaluable resources for breeding for high PVA. PVA level was independent of hybrid yield potential, indicating that selection of superior hybrids with elevated PVA levels should be feasible. 2019 2019-10-10T10:14:24Z 2019-10-10T10:14:24Z Journal Article https://hdl.handle.net/10568/104027 en Open Access application/pdf Wiley Badu-Apraku, B., Fakorede, M.A.B., Talabi, A.O., Oyekunle, M., Aderounmu, M., Lum, A.F. & Toyinbo, J.O. (2019). Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments. Crop Science, 1-51. |
| spellingShingle | maize food security drought tolerance striga striga hermonthica subsaharan africa genetics inbred lines Badu-Apraku, Baffour Fakorede, M.A.B. Talabi, A.O. Oyekunle, M. Aderounmu, M. Lum, A.F. Ribeiro, P.F. Adu, G.B. Toyinbo, J.O. Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title | Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title_full | Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title_fullStr | Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title_full_unstemmed | Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title_short | Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments |
| title_sort | genetic studies of extra early provitamin a maize inbred lines and their hybrids in multiple environments |
| topic | maize food security drought tolerance striga striga hermonthica subsaharan africa genetics inbred lines |
| url | https://hdl.handle.net/10568/104027 |
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