Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa
Adequate knowledge and understanding of the genetic diversity and inter-trait relationships among elite maize inbred lines are crucial for determining breeding strategies and predicting hybrid performance. The objectives of this study were to investigate the genetic diversity of 162 early maturing w...
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MDPI AG
2020-09-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/9/1324 |
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| author | Alimatu Sadia Osuman Baffour Badu-Apraku Beatrice E. Ifie Pangirayi Tongoona Ebenezer Obeng-Bio Ana Luísa Garcia-Oliveira |
| author_facet | Alimatu Sadia Osuman Baffour Badu-Apraku Beatrice E. Ifie Pangirayi Tongoona Ebenezer Obeng-Bio Ana Luísa Garcia-Oliveira |
| author_sort | Alimatu Sadia Osuman |
| collection | DOAJ |
| description | Adequate knowledge and understanding of the genetic diversity and inter-trait relationships among elite maize inbred lines are crucial for determining breeding strategies and predicting hybrid performance. The objectives of this study were to investigate the genetic diversity of 162 early maturing white and yellow tropical maize inbred lines, and to determine the population structure, heterotic groups and inter-trait relationships among the lines. Using 9684 DArT single nucleotide polymorphism (SNP) markers, a gene diversity (GD) of 0.30 was recorded for the inbred lines with polymorphic information content (PIC) ranging from 0.08 to 0.38. The genetic relatedness among the inbred lines evaluated revealed six different groups based on the history of selection, colour of endosperm and pedigree. The genotype-by-trait (GT) biplot analysis identified inbred 1 (TZEI 935) as outstanding in terms of combined heat and drought (HD) tolerance with the base index analysis identifying 15 superior inbreds in the HD environment. A wide range of genetic variability was observed among the inbred lines, indicating that they are an invaluable resource for breeding for HD tolerance in maize breeding programmes, especially in West and Central Africa. |
| first_indexed | 2024-03-10T16:34:53Z |
| format | Article |
| id | doaj.art-6d43dc7a0d7a407cbb1d39e64bafa72a |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T16:34:53Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-6d43dc7a0d7a407cbb1d39e64bafa72a2023-11-20T12:32:55ZengMDPI AGAgronomy2073-43952020-09-01109132410.3390/agronomy10091324Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central AfricaAlimatu Sadia Osuman0Baffour Badu-Apraku1Beatrice E. Ifie2Pangirayi Tongoona3Ebenezer Obeng-Bio4Ana Luísa Garcia-Oliveira5West Africa Center for Crop Improvement (WACCI), University of Ghana, PMB 30 Legon, Accra, GhanaInternational Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan 200001, NigeriaWest Africa Center for Crop Improvement (WACCI), University of Ghana, PMB 30 Legon, Accra, GhanaWest Africa Center for Crop Improvement (WACCI), University of Ghana, PMB 30 Legon, Accra, GhanaCSIR-Crops Research Institute, Ghana. P.O. Box 3785, 039-5028 Kumasi, GhanaExcellence in Breeding (EiB) Platform, International Maize and Wheat Improvement Centre (CIMMYT), ICRAF, PO Box 1041, 00621 Nairobi, KenyaAdequate knowledge and understanding of the genetic diversity and inter-trait relationships among elite maize inbred lines are crucial for determining breeding strategies and predicting hybrid performance. The objectives of this study were to investigate the genetic diversity of 162 early maturing white and yellow tropical maize inbred lines, and to determine the population structure, heterotic groups and inter-trait relationships among the lines. Using 9684 DArT single nucleotide polymorphism (SNP) markers, a gene diversity (GD) of 0.30 was recorded for the inbred lines with polymorphic information content (PIC) ranging from 0.08 to 0.38. The genetic relatedness among the inbred lines evaluated revealed six different groups based on the history of selection, colour of endosperm and pedigree. The genotype-by-trait (GT) biplot analysis identified inbred 1 (TZEI 935) as outstanding in terms of combined heat and drought (HD) tolerance with the base index analysis identifying 15 superior inbreds in the HD environment. A wide range of genetic variability was observed among the inbred lines, indicating that they are an invaluable resource for breeding for HD tolerance in maize breeding programmes, especially in West and Central Africa.https://www.mdpi.com/2073-4395/10/9/1324genetic diversityDArT SNP markersmaizeearly maturityheat and drought tolerance |
| spellingShingle | Alimatu Sadia Osuman Baffour Badu-Apraku Beatrice E. Ifie Pangirayi Tongoona Ebenezer Obeng-Bio Ana Luísa Garcia-Oliveira Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa Agronomy genetic diversity DArT SNP markers maize early maturity heat and drought tolerance |
| title | Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa |
| title_full | Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa |
| title_fullStr | Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa |
| title_full_unstemmed | Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa |
| title_short | Genetic Diversity, Population Structure and Inter-Trait Relationships of Combined Heat and Drought Tolerant Early-Maturing Maize Inbred Lines from West and Central Africa |
| title_sort | genetic diversity population structure and inter trait relationships of combined heat and drought tolerant early maturing maize inbred lines from west and central africa |
| topic | genetic diversity DArT SNP markers maize early maturity heat and drought tolerance |
| url | https://www.mdpi.com/2073-4395/10/9/1324 |
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