qDTY12.1: a locus with a consistent effect on grain yield under drought in rice
Selection for grain yield under drought is an efficient criterion for improving the drought tolerance of rice. Recently, some drought-tolerant rice varieties have been developed using this selection criterion and successfully released for cultivation in drought-prone target environments. The process...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Springer
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/165675 |
| _version_ | 1855524473375031296 |
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| author | Mishra, Krishna Kumar Vikram, Prashant Yadaw, Ram Baran Swamy, B.P. Mallikarjuna Dixit, Shalabh Cruz, Ma Teresa Sta Maturan, Paul Marker, Shailesh Kumar, Arvind |
| author_browse | Cruz, Ma Teresa Sta Dixit, Shalabh Kumar, Arvind Marker, Shailesh Maturan, Paul Mishra, Krishna Kumar Swamy, B.P. Mallikarjuna Vikram, Prashant Yadaw, Ram Baran |
| author_facet | Mishra, Krishna Kumar Vikram, Prashant Yadaw, Ram Baran Swamy, B.P. Mallikarjuna Dixit, Shalabh Cruz, Ma Teresa Sta Maturan, Paul Marker, Shailesh Kumar, Arvind |
| author_sort | Mishra, Krishna Kumar |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Selection for grain yield under drought is an efficient criterion for improving the drought tolerance of rice. Recently, some drought-tolerant rice varieties have been developed using this selection criterion and successfully released for cultivation in drought-prone target environments. The process can be made more efficient and rapid through marker-assisted breeding, a well-known fast-track approach in crop improvement. QTLs have been identified for grain yield under drought with large effects against drought-susceptible varieties. Most of the identified QTLs show large QTL × environment or QTL × genetic background interactions. The development of mapping populations in the background of popular high-yielding varieties, screening across environments, including the target environments, and the identification of QTLs with a consistent effect across environments can be a suitable alternative marker-assisted breeding strategy. An IR74371-46-1-1 × Sabitri backcross inbred line population was screened for reproductive-stage drought stress at the International Rice Research Institute, Philippines, and Regional Agricultural Research Station, Nepalgunj, Nepal, in the dry and wet seasons of 2011, respectively. A bulk segregant analysis approach was used to identify markers associated with high grain yield under drought.A QTL, qDTY 12.1 , significantly associated with grain yield under reproductive-stage drought stress was identified on chromosome 12 with a consistent effect in two environments: IRRI, Philippines, and RARS, Nepalgunj, Nepal. This QTL explained phenotypic variance of 23.8% and contributed an additive effect of 45.3% for grain yield under drought. The positive QTL allele for qDTY 12.1 was contributed by tolerant parent IR74371-46-1-1.In this study, qDTY 12.1 showed a consistent effect across environments for high grain yield under lowland reproductive-stage drought stress in the background of popular high-yielding but drought-susceptible recipient variety Sabitri. qDTY 12.1 was also reported previously [Crop Sci 47:507–516, 2007] to increase grain yield under upland reproductive-stage drought stress situations. qDTY 12.1 is the only QTL reported so far in rice to have shown a large effect against multiple recipient genetic backgrounds as well as under highly diverse upland and lowland rice ecosystems. qDTY 12.1 can be successfully introgressed to improve grain yield under drought of popular high-yielding but drought-susceptible lowland as well as upland adapted varieties following marker-assisted breeding. |
| format | Journal Article |
| id | CGSpace165675 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1656752025-05-14T10:24:07Z qDTY12.1: a locus with a consistent effect on grain yield under drought in rice Mishra, Krishna Kumar Vikram, Prashant Yadaw, Ram Baran Swamy, B.P. Mallikarjuna Dixit, Shalabh Cruz, Ma Teresa Sta Maturan, Paul Marker, Shailesh Kumar, Arvind drought drought stress genetic markers grain yield phenotypes quantitative trait loci stress stress tolerance varieties Selection for grain yield under drought is an efficient criterion for improving the drought tolerance of rice. Recently, some drought-tolerant rice varieties have been developed using this selection criterion and successfully released for cultivation in drought-prone target environments. The process can be made more efficient and rapid through marker-assisted breeding, a well-known fast-track approach in crop improvement. QTLs have been identified for grain yield under drought with large effects against drought-susceptible varieties. Most of the identified QTLs show large QTL × environment or QTL × genetic background interactions. The development of mapping populations in the background of popular high-yielding varieties, screening across environments, including the target environments, and the identification of QTLs with a consistent effect across environments can be a suitable alternative marker-assisted breeding strategy. An IR74371-46-1-1 × Sabitri backcross inbred line population was screened for reproductive-stage drought stress at the International Rice Research Institute, Philippines, and Regional Agricultural Research Station, Nepalgunj, Nepal, in the dry and wet seasons of 2011, respectively. A bulk segregant analysis approach was used to identify markers associated with high grain yield under drought.A QTL, qDTY 12.1 , significantly associated with grain yield under reproductive-stage drought stress was identified on chromosome 12 with a consistent effect in two environments: IRRI, Philippines, and RARS, Nepalgunj, Nepal. This QTL explained phenotypic variance of 23.8% and contributed an additive effect of 45.3% for grain yield under drought. The positive QTL allele for qDTY 12.1 was contributed by tolerant parent IR74371-46-1-1.In this study, qDTY 12.1 showed a consistent effect across environments for high grain yield under lowland reproductive-stage drought stress in the background of popular high-yielding but drought-susceptible recipient variety Sabitri. qDTY 12.1 was also reported previously [Crop Sci 47:507–516, 2007] to increase grain yield under upland reproductive-stage drought stress situations. qDTY 12.1 is the only QTL reported so far in rice to have shown a large effect against multiple recipient genetic backgrounds as well as under highly diverse upland and lowland rice ecosystems. qDTY 12.1 can be successfully introgressed to improve grain yield under drought of popular high-yielding but drought-susceptible lowland as well as upland adapted varieties following marker-assisted breeding. 2013-12 2024-12-19T12:55:19Z 2024-12-19T12:55:19Z Journal Article https://hdl.handle.net/10568/165675 en Springer Mishra, Krishna Kumar; Vikram, Prashant; Yadaw, Ram Baran; Swamy, BP Mallikarjuna; Dixit, Shalabh; Cruz, Ma Teresa Sta; Maturan, Paul; Marker, Shailesh and Kumar, Arvind. 2013. qDTY12.1: a locus with a consistent effect on grain yield under drought in rice. BMC Genet, Volume 14, no. 1 |
| spellingShingle | drought drought stress genetic markers grain yield phenotypes quantitative trait loci stress stress tolerance varieties Mishra, Krishna Kumar Vikram, Prashant Yadaw, Ram Baran Swamy, B.P. Mallikarjuna Dixit, Shalabh Cruz, Ma Teresa Sta Maturan, Paul Marker, Shailesh Kumar, Arvind qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title | qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title_full | qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title_fullStr | qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title_full_unstemmed | qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title_short | qDTY12.1: a locus with a consistent effect on grain yield under drought in rice |
| title_sort | qdty12 1 a locus with a consistent effect on grain yield under drought in rice |
| topic | drought drought stress genetic markers grain yield phenotypes quantitative trait loci stress stress tolerance varieties |
| url | https://hdl.handle.net/10568/165675 |
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