Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger
The dynamics of crop genetic diversity need to be assessed to draw up monitoring and conservation priorities. However, few surveys have been conducted in centres of diversity. Sub-Saharan Africa is the centre of origin of sorghum. Most Sahel countries have been faced with major human, environmental...
| Autores principales: | , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2010
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/3476 |
| _version_ | 1855528418747088896 |
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| author | Deu, M. Sagnard, F. Chantereau, J. Calatayud, C. Vigouroux, Yves Pham, J.L. Mariac, C. Kapran, I. Mamadou, A. Gerard, Bruno G. Ndjeunga, J. Bezançon, G. |
| author_browse | Bezançon, G. Calatayud, C. Chantereau, J. Deu, M. Gerard, Bruno G. Kapran, I. Mamadou, A. Mariac, C. Ndjeunga, J. Pham, J.L. Sagnard, F. Vigouroux, Yves |
| author_facet | Deu, M. Sagnard, F. Chantereau, J. Calatayud, C. Vigouroux, Yves Pham, J.L. Mariac, C. Kapran, I. Mamadou, A. Gerard, Bruno G. Ndjeunga, J. Bezançon, G. |
| author_sort | Deu, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The dynamics of crop genetic diversity need to be assessed to draw up monitoring and conservation priorities. However, few surveys have been conducted in centres of diversity. Sub-Saharan Africa is the centre of origin of sorghum. Most Sahel countries have been faced with major human, environmental and social changes in recent decades, which are suspected to cause genetic erosion. Sorghum is the second staple cereal in Niger, a centre of diversity for this crop. Niger was submitted to recurrent drought period and to major social changes during these last decades. We report here on a spatio-temporal analysis of sorghum genetic diversity, conducted in 71 villages covering the rainfall gradient and range of agro-ecological conditions in Niger’s agricultural areas. We used 28 microsatellite markers and applied spatial and genetic clustering methods to investigate change in genetic diversity over a 26-year period (1976–2003). Global genetic differentiation between the two collections was very low (F st = 0.0025). Most of the spatial clusters presented no major differentiation, as measured by F st, and showed stability or an increase in allelic richness, except for two of them located in eastern Niger. The genetic clusters identified by Bayesian analysis did not show a major change between the two collections in the distribution of accessions between them or in their spatial location. These results suggest that farmers’ management has globally preserved sorghum genetic diversity in Niger. |
| format | Journal Article |
| id | CGSpace3476 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace34762023-12-08T19:36:04Z Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger Deu, M. Sagnard, F. Chantereau, J. Calatayud, C. Vigouroux, Yves Pham, J.L. Mariac, C. Kapran, I. Mamadou, A. Gerard, Bruno G. Ndjeunga, J. Bezançon, G. crops genetics The dynamics of crop genetic diversity need to be assessed to draw up monitoring and conservation priorities. However, few surveys have been conducted in centres of diversity. Sub-Saharan Africa is the centre of origin of sorghum. Most Sahel countries have been faced with major human, environmental and social changes in recent decades, which are suspected to cause genetic erosion. Sorghum is the second staple cereal in Niger, a centre of diversity for this crop. Niger was submitted to recurrent drought period and to major social changes during these last decades. We report here on a spatio-temporal analysis of sorghum genetic diversity, conducted in 71 villages covering the rainfall gradient and range of agro-ecological conditions in Niger’s agricultural areas. We used 28 microsatellite markers and applied spatial and genetic clustering methods to investigate change in genetic diversity over a 26-year period (1976–2003). Global genetic differentiation between the two collections was very low (F st = 0.0025). Most of the spatial clusters presented no major differentiation, as measured by F st, and showed stability or an increase in allelic richness, except for two of them located in eastern Niger. The genetic clusters identified by Bayesian analysis did not show a major change between the two collections in the distribution of accessions between them or in their spatial location. These results suggest that farmers’ management has globally preserved sorghum genetic diversity in Niger. 2010-05 2011-04-17T10:32:24Z 2011-04-17T10:32:24Z Journal Article https://hdl.handle.net/10568/3476 en Limited Access Springer Deu, M., Sagnard, F., Chantereau, J., Calatayud, C., Vigouroux, Y., Pham, J.L., Mariac, C., Kapran, I., Mamadou, A., Gérard, B., Ndjeunga, J. and Bezançon, G. 2010. Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger. Theoretical and Applied Genetics 120(7):1301-1313. |
| spellingShingle | crops genetics Deu, M. Sagnard, F. Chantereau, J. Calatayud, C. Vigouroux, Yves Pham, J.L. Mariac, C. Kapran, I. Mamadou, A. Gerard, Bruno G. Ndjeunga, J. Bezançon, G. Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title | Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title_full | Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title_fullStr | Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title_full_unstemmed | Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title_short | Spatio-temporal dynamics of genetic diversity in Sorghum bicolor in Niger |
| title_sort | spatio temporal dynamics of genetic diversity in sorghum bicolor in niger |
| topic | crops genetics |
| url | https://hdl.handle.net/10568/3476 |
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