Genomic Analysis of Selected Maize Landraces from Sahel and Coastal West Africa Reveals Their Variability and Potential for Genetic Enhancement
| Autor: | Agre Paterne, Melaku Gedil, Ana Luísa Garcia-Oliveira, Antonia Y. Tetteh, Baffour Badu-Apraku, Charles Nelimor, Assanvo Simon-Pierre N’guetta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Gene Flow
Genetic Markers 0106 biological sciences 0301 basic medicine Germplasm lcsh:QH426-470 Biology Zea mays 01 natural sciences Analysis of molecular variance Article Gene flow 03 medical and health sciences DArTseq markers maize improvement Genetic variation West Africa Genetics Genetic variability Association mapping Phylogeny Genetics (clinical) Genetic diversity business.industry landraces Genetic Variation population structure genetic diversity Adaptation Physiological Biotechnology Plant Breeding lcsh:Genetics Genetic Enhancement 030104 developmental biology Gene pool business Genome Plant 010606 plant biology & botany |
| Zdroj: | Genes Volume 11 Issue 9 Genes, Vol 11, Iss 1054, p 1054 (2020) |
| ISSN: | 2073-4425 |
| DOI: | 10.3390/genes11091054 |
| Popis: | Genetic adaptation of maize to the increasingly unpredictable climatic conditions is an essential prerequisite for achievement of food security and sustainable development goals in sub-Saharan Africa. The landraces of maize which have not served as sources of improved germplasm are invaluable sources of novel genetic variability crucial for achieving this objective. The overall goal of this study was to assess the genetic diversity and population structure of a maize panel of 208 accessions comprising landrace gene pools from Burkina Faso (58), Ghana (43), and Togo (89), together with reference populations (18) from the maize improvement program of the International Institute of Tropical Agriculture (IITA). Genotyping the maize panel with 5974 DArTseq-SNP markers revealed immense genetic diversity indicated by average expected heterozygosity (0.36), observed heterozygosity (0.5), and polymorphic information content (0.29). Model-based population structure neighbor-joining tree discriminant analysis of principal component and principal coordinate analyses all separated the maize panel into three major sub-populations each capable of providing a wide range of allelic variation. Analysis of molecular variance (AMOVA) showed that 86% of the variation was within individuals while 14% was attributable to differences among gene pools. The Burkinabe gene pool was strongly differentiated from all the others (genetic differentiation values > 0.20), with no gene flow (Nm) to the reference populations (Nm = 0.98). Thus this gene pool could be a target for novel genetic variation for maize improvement. The results of the present study confirmed the potential of this maize panel as an invaluable genetic resource for future design of association mapping studies to speed-up the introgression of this novel variation into the existing breeding pipelines. |
| Databáze: | OpenAIRE |
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