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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(6): 910-920
DOI: https://doi.org/10.20546/ijcmas.2017.606.107


Determine Physiological Traits Associated with Flowering Stage Drought Tolerance in Lowland Rice (Oryza sativa L.) Genotypes
A.K. Singh and A.K. Mall*
ICAR-Indian Institute of Sugarcane Research, Lucknow-226 002, India Centre of Advance Studies in Plant Physiology, NDUA&T, Kumarganj-224 229, India
*Corresponding author
Abstract:

Drought stress significantly reduced the RWC and LWP of the rice plant. Moreover, Azucena (DT check), NDR-359, NDR-97, DSU-18-6, Vandana, TN-1 and Moroberekan showed less depression. Result revealed that capacity to maintain high LWP is promising traits for selection to improve tolerance against flowering stage drought tolerance. Grain yield under water deficit at the flowering stage is negatively correlated with spikelet sterility and later associated with genotypic variation in maintenance of LWP. Correlation studies between RWC and per cent grain sterility and LWP vs. per cent sterility indicated that maintenance of RWC is necessary but not significant to ensure good yield. These result suggested that other feature are at least as important as RWC in determining response to flowering stage drought tolerance. Grain yield is well correlated with RL and RWD but strong regression coefficient was obtained between root length and RWC. This result indicated that root length did not contribute directly grain yield under drought at flowering stage. But, it indirectly helps to maintained higher plant water status. Assimilate accumulate prior to flowering are of permanent importance when plant experience drought stress at flowering stage. Present study indicated that translocation of soluble sugar for grain growth is supported by ACR and ATR was higher in stress. Grain yield was significantly correlated with ACR and ATR.


Keywords: Reproductive stage drought stress, Rice, Morpho-physiological traits, Variability, Correlation, Path coefficient.
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How to cite this article:

Singh, A.K. and Mall, A.K. 2017. Determine Physiological Traits Associated with Flowering Stage Drought Tolerance in Lowland Rice (Oryza sativa L.) genotypes.Int.J.Curr.Microbiol.App.Sci. 6(6): 910-920. doi: https://doi.org/10.20546/ijcmas.2017.606.107