Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa
Limited commercial quality protein maize (QPM) varieties with low grain yield potential are currently grown in Eastern and Southern Africa (ESA). This study was conducted to (i) assess the performance of single-cross QPM hybrids that were developed from elite inbred lines using line-by-tester mating...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Nature Publishing Group
2024
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/162528 |
| _version_ | 1855532301192003584 |
|---|---|
| author | Mebratu, Addisalem Dagne Wegary Gissa Chere, Adefris Teklewold Tarekegne, Amsal T. |
| author_browse | Chere, Adefris Teklewold Dagne Wegary Gissa Mebratu, Addisalem Tarekegne, Amsal T. |
| author_facet | Mebratu, Addisalem Dagne Wegary Gissa Chere, Adefris Teklewold Tarekegne, Amsal T. |
| author_sort | Mebratu, Addisalem |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Limited commercial quality protein maize (QPM) varieties with low grain yield potential are currently grown in Eastern and Southern Africa (ESA). This study was conducted to (i) assess the performance of single-cross QPM hybrids that were developed from elite inbred lines using line-by-tester mating design and (ii) estimate the general (GCA) and specific (SCA) combining ability of the QPM inbred lines for grain yield, agronomic and protein quality traits. One hundred and six testcrosses and four checks were evaluated across six environments in ESA during 2015 and 2016. Significant variations (P ≤ 0.01) were observed among environments, genotypes and genotype by environment interaction (GEI) for most traits evaluated. Hybrids H80 and H104 were the highest-yielding, most desirable, and stable QPM hybrids. Combining ability analysis showed both additive and non-additive gene effects to be important in the inheritance of grain yield. Additive effects were more important for agronomic and protein quality traits. Inbred lines L19 and L20 depicted desirable GCA effects for grain yield. Various other inbred lines with favorable GCA effects for agronomic traits, endosperm modification, and protein quality traits were identified. These inbred lines could be utilized for breeding desirable QPM cultivars. The QPM hybrids identified in this study could be commercialized after on-farm verification to replace the low-yielding QPM hybrids grown in ESA. |
| format | Journal Article |
| id | CGSpace162528 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Nature Publishing Group |
| publisherStr | Nature Publishing Group |
| record_format | dspace |
| spelling | CGSpace1625282025-10-26T12:55:58Z Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa Mebratu, Addisalem Dagne Wegary Gissa Chere, Adefris Teklewold Tarekegne, Amsal T. genes genotype environment interaction maize protein quality Limited commercial quality protein maize (QPM) varieties with low grain yield potential are currently grown in Eastern and Southern Africa (ESA). This study was conducted to (i) assess the performance of single-cross QPM hybrids that were developed from elite inbred lines using line-by-tester mating design and (ii) estimate the general (GCA) and specific (SCA) combining ability of the QPM inbred lines for grain yield, agronomic and protein quality traits. One hundred and six testcrosses and four checks were evaluated across six environments in ESA during 2015 and 2016. Significant variations (P ≤ 0.01) were observed among environments, genotypes and genotype by environment interaction (GEI) for most traits evaluated. Hybrids H80 and H104 were the highest-yielding, most desirable, and stable QPM hybrids. Combining ability analysis showed both additive and non-additive gene effects to be important in the inheritance of grain yield. Additive effects were more important for agronomic and protein quality traits. Inbred lines L19 and L20 depicted desirable GCA effects for grain yield. Various other inbred lines with favorable GCA effects for agronomic traits, endosperm modification, and protein quality traits were identified. These inbred lines could be utilized for breeding desirable QPM cultivars. The QPM hybrids identified in this study could be commercialized after on-farm verification to replace the low-yielding QPM hybrids grown in ESA. 2024 2024-11-21T15:32:04Z 2024-11-21T15:32:04Z Journal Article https://hdl.handle.net/10568/162528 en Open Access application/pdf Nature Publishing Group Mebratu, A., Wegary, D., Chere, A.T., & Tarekegne, A. T. (2024). Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa. Scientific Reports, 14(1), 9151. https://doi.org/10.1038/s41598-024-58816-y |
| spellingShingle | genes genotype environment interaction maize protein quality Mebratu, Addisalem Dagne Wegary Gissa Chere, Adefris Teklewold Tarekegne, Amsal T. Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title | Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title_full | Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title_fullStr | Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title_full_unstemmed | Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title_short | Testcross performance and combining ability of early-medium maturing quality protein maize inbred lines in Eastern and Southern Africa |
| title_sort | testcross performance and combining ability of early medium maturing quality protein maize inbred lines in eastern and southern africa |
| topic | genes genotype environment interaction maize protein quality |
| url | https://hdl.handle.net/10568/162528 |
| work_keys_str_mv | AT mebratuaddisalem testcrossperformanceandcombiningabilityofearlymediummaturingqualityproteinmaizeinbredlinesineasternandsouthernafrica AT dagnewegarygissa testcrossperformanceandcombiningabilityofearlymediummaturingqualityproteinmaizeinbredlinesineasternandsouthernafrica AT chereadefristeklewold testcrossperformanceandcombiningabilityofearlymediummaturingqualityproteinmaizeinbredlinesineasternandsouthernafrica AT tarekegneamsalt testcrossperformanceandcombiningabilityofearlymediummaturingqualityproteinmaizeinbredlinesineasternandsouthernafrica |