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Deciphering the genetic basis of root morphology, nutrient uptake, yield, and yield-related traits in rice under dry direct-seeded cultivation systems

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Relation http://oar.icrisat.org/11255/
https://doi.org/10.1038/s41598-019-45770-3
10.1038/s41598-019-45770-3
 
Title Deciphering the genetic basis of root morphology, nutrient uptake, yield, and yield-related traits in rice under dry direct-seeded cultivation systems
 
Creator Sandhu, N
Subedi, S R
Singh, V K
Sinha, P
Kumar, S
Singh, S P
Ghimire, S K
Pandey, M
Yadaw, R B
Varshney, R K
Kumar, A
 
Subject Rice
South Asia
Genetics and Genomics
 
Description 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.
 
Publisher Springer Nature Publishing
 
Date 2019-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11255/1/s41598-019-45770-3.pdf
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