Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction
Abstract Background Using a desirable tester is considered one method used to maximise genetic differences among test crosses derived from new inbred lines and improves the overall performance of maize. Thus, this study aimed to evaluate the potency of the tester with varying levels of resistance to...
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CABI
2024-04-01
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| Series: | CABI Agriculture and Bioscience |
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| Online Access: | https://doi.org/10.1186/s43170-024-00239-w |
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| author | Degife Zebire Abebe Menkir Victor Adetimirin Wende Mengesha Meseka Silvestro Melaku Gedil |
| author_facet | Degife Zebire Abebe Menkir Victor Adetimirin Wende Mengesha Meseka Silvestro Melaku Gedil |
| author_sort | Degife Zebire |
| collection | DOAJ |
| description | Abstract Background Using a desirable tester is considered one method used to maximise genetic differences among test crosses derived from new inbred lines and improves the overall performance of maize. Thus, this study aimed to evaluate the potency of the tester with varying levels of resistance to Striga hermonthica in determining the testcross performance of the hybrids for Striga resistance and yield-related traits. Method The experiment was conducted with these test crosses and two standard checks (susceptible and tolerant) for different Striga resistance and agronomic traits during the 2018 cropping season in Abuja and Mokwa, Nigeria. The experiment was laid out in a 23 × 4 alpha-lattice design with two replications in each location. Field evaluation data was collected from Striga resistance and yield-related traits to estimate the performance of test crosses. Analysis of variance was conducted to determine the variance of the testcross performance. Results There were significant differences among test crosses for days to silking, days to pollen shedding, ear at harvest, ear aspect, ear per plant, grain yield, Striga damage rating at 8 and 10 weeks after planting (WAP), and Striga count at 8 and 10 WAP. Variations among test crosses were always higher than the corresponding variations due to the interaction between test crosses and the environment for all traits. Conclusion The inbred lines with low yield reduction crossed with different testers under Striga infested were recorded. These inbreds should be used to develop high-yielding hybrids and synthetics with elevated levels of Striga resistance to improve the maize breeding program. |
| format | Article |
| id | doaj-art-3b986d12bd5a4e51b2c9a3c082f55a8f |
| institution | Kabale University |
| issn | 2662-4044 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | CABI |
| record_format | Article |
| series | CABI Agriculture and Bioscience |
| spelling | doaj-art-3b986d12bd5a4e51b2c9a3c082f55a8f2025-02-03T06:28:25ZengCABICABI Agriculture and Bioscience2662-40442024-04-015111110.1186/s43170-024-00239-wTestcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reactionDegife Zebire0Abebe Menkir1Victor Adetimirin2Wende Mengesha3Meseka Silvestro4Melaku Gedil5International Institute of Tropical Agriculture (IITA)International Institute of Tropical Agriculture (IITA)Department of Agronomy, University of IbadanInternational Institute of Tropical Agriculture (IITA)International Institute of Tropical Agriculture (IITA)International Institute of Tropical Agriculture (IITA)Abstract Background Using a desirable tester is considered one method used to maximise genetic differences among test crosses derived from new inbred lines and improves the overall performance of maize. Thus, this study aimed to evaluate the potency of the tester with varying levels of resistance to Striga hermonthica in determining the testcross performance of the hybrids for Striga resistance and yield-related traits. Method The experiment was conducted with these test crosses and two standard checks (susceptible and tolerant) for different Striga resistance and agronomic traits during the 2018 cropping season in Abuja and Mokwa, Nigeria. The experiment was laid out in a 23 × 4 alpha-lattice design with two replications in each location. Field evaluation data was collected from Striga resistance and yield-related traits to estimate the performance of test crosses. Analysis of variance was conducted to determine the variance of the testcross performance. Results There were significant differences among test crosses for days to silking, days to pollen shedding, ear at harvest, ear aspect, ear per plant, grain yield, Striga damage rating at 8 and 10 weeks after planting (WAP), and Striga count at 8 and 10 WAP. Variations among test crosses were always higher than the corresponding variations due to the interaction between test crosses and the environment for all traits. Conclusion The inbred lines with low yield reduction crossed with different testers under Striga infested were recorded. These inbreds should be used to develop high-yielding hybrids and synthetics with elevated levels of Striga resistance to improve the maize breeding program.https://doi.org/10.1186/s43170-024-00239-wLine × testerInbred linesStriga hermonthicaResistanceTestcross |
| spellingShingle | Degife Zebire Abebe Menkir Victor Adetimirin Wende Mengesha Meseka Silvestro Melaku Gedil Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction CABI Agriculture and Bioscience Line × tester Inbred lines Striga hermonthica Resistance Testcross |
| title | Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction |
| title_full | Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction |
| title_fullStr | Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction |
| title_full_unstemmed | Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction |
| title_short | Testcross performance of Striga-resistant maize inbred lines and testers with varying levels of Striga reaction |
| title_sort | testcross performance of striga resistant maize inbred lines and testers with varying levels of striga reaction |
| topic | Line × tester Inbred lines Striga hermonthica Resistance Testcross |
| url | https://doi.org/10.1186/s43170-024-00239-w |
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