Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions
Hybrid development is enhanced by the assessment and understanding of genetic diversity and distance within inbreds. One hundred and fifty hybrids derived from 30 early-maturing inbreds plus six checks were evaluated at three locations in Nigeria for 2 years to assess their performance under drought...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Elsevier
2015
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| Online Access: | https://hdl.handle.net/10568/72495 |
| _version_ | 1855520334429552640 |
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| author | Oyekunle, M. Badu-Apraku, Baffour Hearne, S. Franco, J. |
| author_browse | Badu-Apraku, Baffour Franco, J. Hearne, S. Oyekunle, M. |
| author_facet | Oyekunle, M. Badu-Apraku, Baffour Hearne, S. Franco, J. |
| author_sort | Oyekunle, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Hybrid development is enhanced by the assessment and understanding of genetic diversity and distance within inbreds. One hundred and fifty hybrids derived from 30 early-maturing inbreds plus six checks were evaluated at three locations in Nigeria for 2 years to assess their performance under drought and well-watered conditions. In addition, twenty three microsatellite markers were employed to assess genetic diversity of selected 42 inbreds. Significant differences were observed among inbreds and hybrids for most traits under both research conditions. A total of 130 alleles were detected ranging from two for nc133 to nine for phi299852 with an average of 5.7 alleles per locus. Polymorphic information content ranged from 0.17 for phi308707 to 0.77 for phi084 with an average of 0.54. Thirty-one unique alleles were detected in 21 inbreds. Microsatellite markers classified the inbred lines into five groups. Genetic distance estimates among pairs of inbreds ranged from 0.42 (TZEI 26 vs TZEI 108) to 0.85 (TZEI 24 vs TZEI 4) with an average of 0.67. Correlation between microsatellite-based GD estimates of the parental lines and their F1 hybrids were not significant for grain yield and other traits under drought and well-watered conditions. However, significant correlations existed between F1 hybrid grain yield and heterosis under drought and well-watered conditions. TZEI 31 × TZEI 18 was identified as the highest-yielding and stable hybrid across environments and should be promoted for adoption by farmers in West and Central Africa. |
| format | Journal Article |
| id | CGSpace72495 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace724952025-11-11T10:10:05Z Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions Oyekunle, M. Badu-Apraku, Baffour Hearne, S. Franco, J. drought stress maize heterosis drought tolerance Hybrid development is enhanced by the assessment and understanding of genetic diversity and distance within inbreds. One hundred and fifty hybrids derived from 30 early-maturing inbreds plus six checks were evaluated at three locations in Nigeria for 2 years to assess their performance under drought and well-watered conditions. In addition, twenty three microsatellite markers were employed to assess genetic diversity of selected 42 inbreds. Significant differences were observed among inbreds and hybrids for most traits under both research conditions. A total of 130 alleles were detected ranging from two for nc133 to nine for phi299852 with an average of 5.7 alleles per locus. Polymorphic information content ranged from 0.17 for phi308707 to 0.77 for phi084 with an average of 0.54. Thirty-one unique alleles were detected in 21 inbreds. Microsatellite markers classified the inbred lines into five groups. Genetic distance estimates among pairs of inbreds ranged from 0.42 (TZEI 26 vs TZEI 108) to 0.85 (TZEI 24 vs TZEI 4) with an average of 0.67. Correlation between microsatellite-based GD estimates of the parental lines and their F1 hybrids were not significant for grain yield and other traits under drought and well-watered conditions. However, significant correlations existed between F1 hybrid grain yield and heterosis under drought and well-watered conditions. TZEI 31 × TZEI 18 was identified as the highest-yielding and stable hybrid across environments and should be promoted for adoption by farmers in West and Central Africa. 2015-01 2016-03-08T13:07:34Z 2016-03-08T13:07:34Z Journal Article https://hdl.handle.net/10568/72495 en Limited Access application/pdf Elsevier Oyekunle, M., Badu-Apraku, B., Hearne, S. & Franco, J. (2015). Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions. Field Crops Research, 170, 55-65. |
| spellingShingle | drought stress maize heterosis drought tolerance Oyekunle, M. Badu-Apraku, Baffour Hearne, S. Franco, J. Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title | Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title_full | Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title_fullStr | Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title_full_unstemmed | Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title_short | Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| title_sort | genetic diversity of tropical early maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions |
| topic | drought stress maize heterosis drought tolerance |
| url | https://hdl.handle.net/10568/72495 |
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