Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation
Development, testing and selection of superior inbred lines is crucial for the success of a hybrid program targeting <i>Striga</i>-infested and low soil nitrogen (low-N) environments. The practical value of inbred lines is determined by multiple traits, most of which are inter-dependent....
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MDPI AG
2021-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/7/1309 |
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| author | Gloria B. Adu Baffour Badu-Apraku Richard Akromah |
| author_facet | Gloria B. Adu Baffour Badu-Apraku Richard Akromah |
| author_sort | Gloria B. Adu |
| collection | DOAJ |
| description | Development, testing and selection of superior inbred lines is crucial for the success of a hybrid program targeting <i>Striga</i>-infested and low soil nitrogen (low-N) environments. The practical value of inbred lines is determined by multiple traits, most of which are inter-dependent. The main objective of this study was to identify early maturing inbred lines based on multiple traits under optimal, low-N and <i>Striga</i>-infested environments for hybrid development and population improvement. One hundred early maturing inbred lines were evaluated under artificial <i>Striga</i>-infestation, low-N and optimal growing environments for two years at Kwadaso and Nyankpala in Ghana. The inbred lines exhibited high levels of genetic variability for grain yield and other agronomic traits desirable for <i>Striga</i> resistance and low-N tolerance. Under optimal growing conditions, days to silking (DS), ears per plot (EHARV) and days to anthesis (DA) had high direct effects on grain yield (GYLD). Days to silking and ears per plant (EPP) had the highest positive direct effects on GYLD, while DA had the highest negative direct effect on grain yield in low-N environments. Under <i>Striga</i>-infestation, the highest negative direct effect on GYLD was obtained with EASP. All the measured traits previously identified to have direct influence on grain yield were associated with it and could be used for indirect selection for improved grain yield under the contrasting environments. Forty-eight of the 100 inbred lines studied were identified as low-N tolerant and forty-nine as <i>Striga</i> resistant. |
| first_indexed | 2024-03-09T04:51:31Z |
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| id | doaj.art-fba597c6bbe9492aa4a36625e255180c |
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| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T04:51:31Z |
| publishDate | 2021-06-01 |
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| series | Agronomy |
| spelling | doaj.art-fba597c6bbe9492aa4a36625e255180c2023-12-03T13:11:04ZengMDPI AGAgronomy2073-43952021-06-01117130910.3390/agronomy11071309Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> InfestationGloria B. Adu0Baffour Badu-Apraku1Richard Akromah2Council for Scientific and Industrial Research (CSIR), Savanna Agricultural Research Institute, P.O. Box TL 52, Tamale 00233, GhanaMaize Improvement Program, International Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan 200001, Oyo State, NigeriaDepartment of Crop and Soil Sciences, Faculty of Agriculture, Kwame Nkrumah University of Science and Technology, P.O. Box 152, Kumasi AK-039-5028, GhanaDevelopment, testing and selection of superior inbred lines is crucial for the success of a hybrid program targeting <i>Striga</i>-infested and low soil nitrogen (low-N) environments. The practical value of inbred lines is determined by multiple traits, most of which are inter-dependent. The main objective of this study was to identify early maturing inbred lines based on multiple traits under optimal, low-N and <i>Striga</i>-infested environments for hybrid development and population improvement. One hundred early maturing inbred lines were evaluated under artificial <i>Striga</i>-infestation, low-N and optimal growing environments for two years at Kwadaso and Nyankpala in Ghana. The inbred lines exhibited high levels of genetic variability for grain yield and other agronomic traits desirable for <i>Striga</i> resistance and low-N tolerance. Under optimal growing conditions, days to silking (DS), ears per plot (EHARV) and days to anthesis (DA) had high direct effects on grain yield (GYLD). Days to silking and ears per plant (EPP) had the highest positive direct effects on GYLD, while DA had the highest negative direct effect on grain yield in low-N environments. Under <i>Striga</i>-infestation, the highest negative direct effect on GYLD was obtained with EASP. All the measured traits previously identified to have direct influence on grain yield were associated with it and could be used for indirect selection for improved grain yield under the contrasting environments. Forty-eight of the 100 inbred lines studied were identified as low-N tolerant and forty-nine as <i>Striga</i> resistant.https://www.mdpi.com/2073-4395/11/7/1309inbred line developmentgrain yield<i>Striga hermonthica</i>low soil nitrogensecondary traits and indirect selection |
| spellingShingle | Gloria B. Adu Baffour Badu-Apraku Richard Akromah Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation Agronomy inbred line development grain yield <i>Striga hermonthica</i> low soil nitrogen secondary traits and indirect selection |
| title | Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation |
| title_full | Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation |
| title_fullStr | Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation |
| title_full_unstemmed | Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation |
| title_short | Strategies for Selecting Early Maturing Maize Inbred Lines for Hybrid Production under Low Soil Nitrogen and <i>Striga</i> Infestation |
| title_sort | strategies for selecting early maturing maize inbred lines for hybrid production under low soil nitrogen and i striga i infestation |
| topic | inbred line development grain yield <i>Striga hermonthica</i> low soil nitrogen secondary traits and indirect selection |
| url | https://www.mdpi.com/2073-4395/11/7/1309 |
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