QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter]
Background Tef [Eragrostis tef (Zucc.) Trotter] is the major cereal crop in Ethiopia. Tef is an allotetraploid with a base chromosome number of 10 (2n = 4× = 40) and a genome size of 730 Mbp. The goal of this study was to identify agronomically important quantitative trait loci (QTL) using recomb...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2007
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/93021 |
| _version_ | 1855525359486763008 |
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| author | Yu, J.K. Graznak, E. Breseghello, Flávio Tefera, H. Sorrells, M.E. |
| author_browse | Breseghello, Flávio Graznak, E. Sorrells, M.E. Tefera, H. Yu, J.K. |
| author_facet | Yu, J.K. Graznak, E. Breseghello, Flávio Tefera, H. Sorrells, M.E. |
| author_sort | Yu, J.K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Background
Tef [Eragrostis tef (Zucc.) Trotter] is the major cereal crop in Ethiopia. Tef is an allotetraploid with a base chromosome number of 10 (2n = 4× = 40) and a genome size of 730 Mbp. The goal of this study was to identify agronomically important quantitative trait loci (QTL) using recombinant inbred lines (RIL) derived from an inter-specific cross between E. tef and E. pilosa (30-5).
Results
Twenty-two yield-related and morphological traits were assessed across eight different locations in Ethiopia during the growing seasons of 1999 and 2000. Using composite interval mapping and a linkage map incorporating 192 loci, 99 QTLs were identified on 15 of the 21 linkage groups for 19 traits. Twelve QTLs on nine linkage groups were identified for grain yield. Clusters of more than five QTLs for various traits were identified on seven linkage groups. The largest cluster (10 QTLs) was identified on linkage group 8; eight of these QTLs were for yield or yield components, suggesting linkage or pleotrophic effects of loci. There were 15 two-way interactions of loci to detect potential epistasis identified and 75% of the interactions were derived from yield and shoot biomass. Thirty-one percent of the QTLs were observed in multiple environments; two yield QTLs were consistent across all agro-ecology zones. For 29.3% of the QTLs, the alleles from E. pilosa (30-5) had a beneficial effect.
Conclusion
The extensive QTL data generated for tef in this study will provide a basis for initiating molecular breeding to improve agronomic traits in this staple food crop for the people of Ethiopia. |
| format | Journal Article |
| id | CGSpace93021 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace930212025-11-11T10:17:16Z QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] Yu, J.K. Graznak, E. Breseghello, Flávio Tefera, H. Sorrells, M.E. eragrostis tef quantitative trait loci cereal crops agronomy traits Background Tef [Eragrostis tef (Zucc.) Trotter] is the major cereal crop in Ethiopia. Tef is an allotetraploid with a base chromosome number of 10 (2n = 4× = 40) and a genome size of 730 Mbp. The goal of this study was to identify agronomically important quantitative trait loci (QTL) using recombinant inbred lines (RIL) derived from an inter-specific cross between E. tef and E. pilosa (30-5). Results Twenty-two yield-related and morphological traits were assessed across eight different locations in Ethiopia during the growing seasons of 1999 and 2000. Using composite interval mapping and a linkage map incorporating 192 loci, 99 QTLs were identified on 15 of the 21 linkage groups for 19 traits. Twelve QTLs on nine linkage groups were identified for grain yield. Clusters of more than five QTLs for various traits were identified on seven linkage groups. The largest cluster (10 QTLs) was identified on linkage group 8; eight of these QTLs were for yield or yield components, suggesting linkage or pleotrophic effects of loci. There were 15 two-way interactions of loci to detect potential epistasis identified and 75% of the interactions were derived from yield and shoot biomass. Thirty-one percent of the QTLs were observed in multiple environments; two yield QTLs were consistent across all agro-ecology zones. For 29.3% of the QTLs, the alleles from E. pilosa (30-5) had a beneficial effect. Conclusion The extensive QTL data generated for tef in this study will provide a basis for initiating molecular breeding to improve agronomic traits in this staple food crop for the people of Ethiopia. 2007-12 2018-06-04T13:51:34Z 2018-06-04T13:51:34Z Journal Article https://hdl.handle.net/10568/93021 en Open Access application/pdf Springer Yu, J.K., Graznak, E., Breseghello, F., Tefera, H. & Sorrells, M.E. (2007). QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter]. BMC Plant Biology, 7(30), 1-13. |
| spellingShingle | eragrostis tef quantitative trait loci cereal crops agronomy traits Yu, J.K. Graznak, E. Breseghello, Flávio Tefera, H. Sorrells, M.E. QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title | QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title_full | QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title_fullStr | QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title_full_unstemmed | QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title_short | QTL mapping of agronomic traits in tef [Eragrostis tef (Zucc) Trotter] |
| title_sort | qtl mapping of agronomic traits in tef eragrostis tef zucc trotter |
| topic | eragrostis tef quantitative trait loci cereal crops agronomy traits |
| url | https://hdl.handle.net/10568/93021 |
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