TY  - JOUR
AV  - public
A1  - Sandhu, N
A1  - Subedi, S R
A1  - Singh, V K
A1  - Sinha, P
A1  - Kumar, S
A1  - Singh, S P
A1  - Ghimire, S K
A1  - Pandey, M
A1  - Yadaw, R B
A1  - Varshney, R K
A1  - Kumar, A
TI  - Deciphering the genetic basis of root morphology, nutrient uptake, yield, and yield-related traits in rice under dry direct-seeded cultivation systems
UR  - https://doi.org/10.1038/s41598-019-45770-3
JF  - Scientific Reports (TSI)
SN  - 2045-2322
PB  - Springer Nature Publishing
N1  - 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?.
N2  - 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.
KW  - rice
KW  -  genetic basis
KW  -  genomics
KW  -  genetics
KW  -  QTLs
Y1  - 2019/06//
SP  - 1
ID  - icrisat11255
EP  - 16
VL  - 9 (1)
IS  - 9334
ER  -