Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

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

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.ORCID: 0000-0002-4562-9131 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, 9 (1). Art. 9334.

[img]
Preview
PDF - Published Version
Download (3MB) | Preview
Free to read: https://doi.org/10.1038/s41598-019-45770-3
*No subscription required

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: Journal Article
Publisher: Springer Nature
Copyright: © 2019 Springer Nature Limited
URI: http://researchrepository.murdoch.edu.au/id/eprint/60369
Item Control Page Item Control Page

Downloads

Downloads per month over past year