Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits
A desirable tester that elicits greater genetic difference in Striga resistance among test crosses in a breeding program has not been reported. Therefore, this study was conducted to characterize 30 Striga resistant yellow endosperm maize inbred lines and three testers with varying resistance levels...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2021
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/115967 |
| _version_ | 1855533592567873536 |
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| author | Zebire, D. Menkir, A. Adetimirin, V. Mengesha, W. Meseka, S.K. Gedil, M. |
| author_browse | Adetimirin, V. Gedil, M. Mengesha, W. Menkir, A. Meseka, S.K. Zebire, D. |
| author_facet | Zebire, D. Menkir, A. Adetimirin, V. Mengesha, W. Meseka, S.K. Gedil, M. |
| author_sort | Zebire, D. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A desirable tester that elicits greater genetic difference in Striga resistance among test crosses in a breeding program has not been reported. Therefore, this study was conducted to characterize 30 Striga resistant yellow endosperm maize inbred lines and three testers with varying resistance levels to Striga using DArTseq SNP markers and agronomic traits to identify a suitable tester for resistance hybrid breeding. Marker-based and agronomic trait-based genetic distances were estimated for yellow endosperm maize inbred lines and testers with varying resistance levels to Striga. The Marker-based cluster analysis separated the Striga resistant lines and testers into two distinct groups. Although the susceptible tester (T3) was the most distantly related to the 30 Striga resistant inbred lines, it exhibited a narrower range in genetic distance estimates and poor agronomic performance under Striga infestation in crosses with the resistant lines. In contrast, the resistant tester (T2) showed a broader range in genetic distance estimates in pairs with the 30 resistant lines. Also, it formed many high yielding hybrids with desirable traits under parasite pressure. Furthermore, the most significant positive association between agronomic trait-based and marker-based distance estimates (r = 0.389, P = 0.01) was observed when T2 has paired with the Striga resistant maize inbred lines. It thus appears that T2 may be used as a suitable tester to determine the breeding value of lines in hybrid maize resistance breeding programs. T2 was the most suitable tester, with a tolerant tester (T1) as an alternative tester to characterize the combining ability of Striga resistant maize inbred lines. This result can also encourage other breeders to investigate testers relative discriminating ability with varying levels of resistance in hybrid breeding for resistance to diseases, pests, and other parasitic plants. |
| format | Journal Article |
| id | CGSpace115967 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| record_format | dspace |
| spelling | CGSpace1159672025-12-02T02:11:49Z Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits Zebire, D. Menkir, A. Adetimirin, V. Mengesha, W. Meseka, S.K. Gedil, M. maize striga agronomy breeding diseases dna genotypes agronomic characters A desirable tester that elicits greater genetic difference in Striga resistance among test crosses in a breeding program has not been reported. Therefore, this study was conducted to characterize 30 Striga resistant yellow endosperm maize inbred lines and three testers with varying resistance levels to Striga using DArTseq SNP markers and agronomic traits to identify a suitable tester for resistance hybrid breeding. Marker-based and agronomic trait-based genetic distances were estimated for yellow endosperm maize inbred lines and testers with varying resistance levels to Striga. The Marker-based cluster analysis separated the Striga resistant lines and testers into two distinct groups. Although the susceptible tester (T3) was the most distantly related to the 30 Striga resistant inbred lines, it exhibited a narrower range in genetic distance estimates and poor agronomic performance under Striga infestation in crosses with the resistant lines. In contrast, the resistant tester (T2) showed a broader range in genetic distance estimates in pairs with the 30 resistant lines. Also, it formed many high yielding hybrids with desirable traits under parasite pressure. Furthermore, the most significant positive association between agronomic trait-based and marker-based distance estimates (r = 0.389, P = 0.01) was observed when T2 has paired with the Striga resistant maize inbred lines. It thus appears that T2 may be used as a suitable tester to determine the breeding value of lines in hybrid maize resistance breeding programs. T2 was the most suitable tester, with a tolerant tester (T1) as an alternative tester to characterize the combining ability of Striga resistant maize inbred lines. This result can also encourage other breeders to investigate testers relative discriminating ability with varying levels of resistance in hybrid breeding for resistance to diseases, pests, and other parasitic plants. 2021 2021-11-10T15:28:46Z 2021-11-10T15:28:46Z Journal Article https://hdl.handle.net/10568/115967 en Open Access application/pdf application/pdf Zebire, D., Menkir, A., Adetimirin, V., Mengesha, W., Meseka, S. K. & Gedil, M. (2021). Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomic traits. Plos One, 16(6), e0253481: 1-18. |
| spellingShingle | maize striga agronomy breeding diseases dna genotypes agronomic characters Zebire, D. Menkir, A. Adetimirin, V. Mengesha, W. Meseka, S.K. Gedil, M. Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title | Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title_full | Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title_fullStr | Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title_full_unstemmed | Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title_short | Identifying suitable tester for evaluating Striga resistant maize inbred lines using DArTseq markers and agronomict traits |
| title_sort | identifying suitable tester for evaluating striga resistant maize inbred lines using dartseq markers and agronomict traits |
| topic | maize striga agronomy breeding diseases dna genotypes agronomic characters |
| url | https://hdl.handle.net/10568/115967 |
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