Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits
Green Revolution (GR) rice varieties are high yielding but typically drought sensitive. This is partly due to the tight linkage between the loci governing plant height and drought tolerance. This linkage is illustrated here through characterization of qDTY1.1, a QTL for grain yield under drought tha...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/165384 |
| _version_ | 1855541357295173632 |
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| author | Vikram, Prashant Swamy, B.P. Mallikarjuna Dixit, Shalabh Singh, Renu Singh, Bikram P. Miro, Berta Kohli, Ajay Henry, Amelia Singh, N.K. Kumar, Arvind |
| author_browse | Dixit, Shalabh Henry, Amelia Kohli, Ajay Kumar, Arvind Miro, Berta Singh, Bikram P. Singh, N.K. Singh, Renu Swamy, B.P. Mallikarjuna Vikram, Prashant |
| author_facet | Vikram, Prashant Swamy, B.P. Mallikarjuna Dixit, Shalabh Singh, Renu Singh, Bikram P. Miro, Berta Kohli, Ajay Henry, Amelia Singh, N.K. Kumar, Arvind |
| author_sort | Vikram, Prashant |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Green Revolution (GR) rice varieties are high yielding but typically drought sensitive. This is partly due to the tight linkage between the loci governing plant height and drought tolerance. This linkage is illustrated here through characterization of qDTY1.1, a QTL for grain yield under drought that co-segregates with the GR gene sd1 for semi-dwarf plant height. We report that the loss of the qDTY1.1 allele during the GR was due to its tight linkage in repulsion with the sd1 allele. Other drought-yield QTLs (qDTY) also showed tight linkage with traits rejected in GR varieties. Genetic diversity analysis for 11 different qDTY regions grouped GR varieties separately from traditional drought-tolerant varieties and showed lower frequency of drought tolerance alleles. The increased understanding and breaking of the linkage between drought tolerance and undesirable traits has led to the development of high-yielding drought-tolerant dwarf lines with positive qDTY alleles and provides new hope for extending the benefits of the GR to drought-prone rice-growing regions. |
| format | Journal Article |
| id | CGSpace165384 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1653842025-05-14T10:40:01Z Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits Vikram, Prashant Swamy, B.P. Mallikarjuna Dixit, Shalabh Singh, Renu Singh, Bikram P. Miro, Berta Kohli, Ajay Henry, Amelia Singh, N.K. Kumar, Arvind alleles drought drought tolerance high yielding linkage plant breeding plant characteristics varieties Green Revolution (GR) rice varieties are high yielding but typically drought sensitive. This is partly due to the tight linkage between the loci governing plant height and drought tolerance. This linkage is illustrated here through characterization of qDTY1.1, a QTL for grain yield under drought that co-segregates with the GR gene sd1 for semi-dwarf plant height. We report that the loss of the qDTY1.1 allele during the GR was due to its tight linkage in repulsion with the sd1 allele. Other drought-yield QTLs (qDTY) also showed tight linkage with traits rejected in GR varieties. Genetic diversity analysis for 11 different qDTY regions grouped GR varieties separately from traditional drought-tolerant varieties and showed lower frequency of drought tolerance alleles. The increased understanding and breaking of the linkage between drought tolerance and undesirable traits has led to the development of high-yielding drought-tolerant dwarf lines with positive qDTY alleles and provides new hope for extending the benefits of the GR to drought-prone rice-growing regions. 2015-10-13 2024-12-19T12:55:02Z 2024-12-19T12:55:02Z Journal Article https://hdl.handle.net/10568/165384 en Open Access Springer Vikram, Prashant; Swamy, B. P. Mallikarjuna; Dixit, Shalabh; Singh, Renu; Singh, Bikram P.; Miro, Berta; Kohli, Ajay; Henry, Amelia; Singh, N. K. and Kumar, Arvind. 2015. Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits. Sci Rep, Volume 5, no. 1 |
| spellingShingle | alleles drought drought tolerance high yielding linkage plant breeding plant characteristics varieties Vikram, Prashant Swamy, B.P. Mallikarjuna Dixit, Shalabh Singh, Renu Singh, Bikram P. Miro, Berta Kohli, Ajay Henry, Amelia Singh, N.K. Kumar, Arvind Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title | Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title_full | Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title_fullStr | Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title_full_unstemmed | Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title_short | Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits |
| title_sort | drought susceptibility of modern rice varieties an effect of linkage of drought tolerance with undesirable traits |
| topic | alleles drought drought tolerance high yielding linkage plant breeding plant characteristics varieties |
| url | https://hdl.handle.net/10568/165384 |
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