Scientific Publication

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

author(s) 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
from International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
permalink open
themes
regions
  • Southern Asia
  • Asia
  • World
citation

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

Publications and datasets provided via GARDIAN

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

Open original