Sandhu, N and Subedi, S R and Singh, V K and Sinha, P and Kumar, S and Singh, S P and Ghimire, S K and Pandey, M and Yadaw, R B and Varshney, R K and Kumar, A (2019) Deciphering the genetic basis of root morphology, nutrient uptake, yield, and yield-related traits in rice under dry direct-seeded cultivation systems. Scientific Reports (TSI), 9 (1) (9334). pp. 1-16. ISSN 2045-2322
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Abstract
In the face of global water scarcity, a successful transition of rice cultivation from puddled to dry direct-seeded rice (DDSR) is a future need. A genome-wide association study was performed on a complex mapping population for 39 traits: 9 seedling-establishment traits, 14 root and nutrient-uptake traits, 5 plant morphological traits, 4 lodging resistance traits, and 7 yield and yield-contributing traits. A total of 10 significant marker-trait associations (MTAs) were found along with 25 QTLs associated with 25 traits. The percent phenotypic variance explained by SNPs ranged from 8% to 84%. Grain yield was found to be significantly and positively correlated with seedling-establishment traits, root morphological traits, nutrient uptake-related traits, and grain yield-contributing traits. The genomic colocation of different root morphological traits, nutrient uptake-related traits, and grain-yield-contributing traits further supports the role of root morphological traits in improving nutrient uptake and grain yield under DDSR. The QTLs/candidate genes underlying the significant MTAs were identified. The identified promising progenies carrying these QTLs may serve as potential donors to be exploited in genomics-assisted breeding programs for improving grain yield and adaptability under DDSR.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : Genetic Gains |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | rice, genetic basis, genomics, genetics, QTLs |
| Subjects: | Others > Rice Others > South Asia Others > Genetics and Genomics |
| Depositing User: | Mr Ramesh K |
| Date Deposited: | 21 Aug 2019 05:00 |
| Last Modified: | 21 Aug 2019 05:13 |
| URI: | http://oar.icrisat.org/id/eprint/11255 |
| Official URL: | https://doi.org/10.1038/s41598-019-45770-3 |
| Projects: | TA8441-Development and dissemination of climate-resilient rice varieties for water-short areas of South Asia and Southeast Asia |
| Funders: | Asian Development Bank, Government of Finland |
| Acknowledgement: | We thank the Asian Development Bank and Government of Finland for their financial support for this study through the project “TA8441-Development and dissemination of climate-resilient rice varieties for water-short areas of South Asia and Southeast Asia”. |
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