Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice
Abstract Rice, a major food crop, is grown in a wide range of ecological conditions and suffers significant yield losses as it is constantly exposed to a wide range of environmental and biotic stresses. The prevalence of different biotypes/strains has necessitated assembling of numerous resistance g...
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| Format: | Article |
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Nature Portfolio
2018-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-018-20495-x |
| _version_ | 1818344067992387584 |
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| author | Gitishree Das Gundimeda J. N. Rao M. Varier A. Prakash Dokku Prasad |
| author_facet | Gitishree Das Gundimeda J. N. Rao M. Varier A. Prakash Dokku Prasad |
| author_sort | Gitishree Das |
| collection | DOAJ |
| description | Abstract Rice, a major food crop, is grown in a wide range of ecological conditions and suffers significant yield losses as it is constantly exposed to a wide range of environmental and biotic stresses. The prevalence of different biotypes/strains has necessitated assembling of numerous resistance genes/QTLs into elite genotypes to confer a broader scale of resistance. The current study reports successful pyramiding of genes/QTLs that confer tolerance/resistance to submergence (Sub1), salinity (Saltol), blast (Pi2, Pi9) and gall midge (Gm1, Gm4) to supplement the four bacterial blight resistance genes (Xa 4, xa5, xa13, Xa21) present in Improved Tapaswini, an elite cultivar. The precise transfer of genes/QTLs was accomplished through effective foreground selection and suitable gene pyramids were identified. Background selection was practiced using morphological and grain quality traits to enhance the recovery of the recurrent parental genome. In the bioassays, the pyramids exhibited higher levels of resistance/ tolerance against the target stresses. The novel feature of the study was successful pyramidization and demonstration of the function of ten genes/QTLs in a new genotype. This success can stimulate several such studies to realize the full potential of molecular plant breeding as the foundation for rice improvement. |
| first_indexed | 2024-12-13T16:40:36Z |
| format | Article |
| id | doaj.art-2691927aaf314122a80713343367b3c0 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T16:40:36Z |
| publishDate | 2018-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-2691927aaf314122a80713343367b3c02022-12-21T23:38:18ZengNature PortfolioScientific Reports2045-23222018-02-018111610.1038/s41598-018-20495-xImproved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in riceGitishree Das0Gundimeda J. N. Rao1M. Varier2A. Prakash3Dokku Prasad4Crop Improvement Division, ICAR-National Rice Research InstituteCrop Improvement Division, ICAR-National Rice Research InstituteNRRI-Central Rainfed Upland Rice Research StationCrop Protection Division, ICAR-National Rice Research InstituteCrop Improvement Division, ICAR-National Rice Research InstituteAbstract Rice, a major food crop, is grown in a wide range of ecological conditions and suffers significant yield losses as it is constantly exposed to a wide range of environmental and biotic stresses. The prevalence of different biotypes/strains has necessitated assembling of numerous resistance genes/QTLs into elite genotypes to confer a broader scale of resistance. The current study reports successful pyramiding of genes/QTLs that confer tolerance/resistance to submergence (Sub1), salinity (Saltol), blast (Pi2, Pi9) and gall midge (Gm1, Gm4) to supplement the four bacterial blight resistance genes (Xa 4, xa5, xa13, Xa21) present in Improved Tapaswini, an elite cultivar. The precise transfer of genes/QTLs was accomplished through effective foreground selection and suitable gene pyramids were identified. Background selection was practiced using morphological and grain quality traits to enhance the recovery of the recurrent parental genome. In the bioassays, the pyramids exhibited higher levels of resistance/ tolerance against the target stresses. The novel feature of the study was successful pyramidization and demonstration of the function of ten genes/QTLs in a new genotype. This success can stimulate several such studies to realize the full potential of molecular plant breeding as the foundation for rice improvement.https://doi.org/10.1038/s41598-018-20495-x |
| spellingShingle | Gitishree Das Gundimeda J. N. Rao M. Varier A. Prakash Dokku Prasad Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice Scientific Reports |
| title | Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice |
| title_full | Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice |
| title_fullStr | Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice |
| title_full_unstemmed | Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice |
| title_short | Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice |
| title_sort | improved tapaswini having four bb resistance genes pyramided with six genes qtls resistance tolerance to biotic and abiotic stresses in rice |
| url | https://doi.org/10.1038/s41598-018-20495-x |
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