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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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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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Original Research Articles

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.2018.7(1): 2716-2725
DOI: https://doi.org/10.20546/ijcmas.2018.701.325


Comparative Study on Backcross Inbred Lines of IR64 Rice (Oryza sativa L.) Introgressed with Drought QTLs under Varied Moisture Regimes over Different Seasons
Baghyalakshmi1*, P. Jeyaprakash2, S. Ramchander2,Radhamani2 and M. Raveendran3
1Division of Crop Improvement, Central Tobacco Research Institute, Rajahmundry, Andhra Pradesh, India
2Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University,Coimbatore --641003, Tamil Nadu, India
3Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, --641003, Tamil Nadu, India
*Corresponding author
Abstract:

Among the abiotic stresses, drought is the major factor for heavy yield losses in rice production. The present study was undertaken with an aim of understanding the effect of mega QTLs of Apo controlling yield under drought. The BILs viz., CB 229 and CB 193-3 were evaluated for their drought responses under green house conditions along with the parents Apo, IR64 and check Norungan during Summer 2015, Kharif 2015, Rabi 2015-16. The results from this study reported that, Apo and BILs had higher photosynthetic rate when compared to IR64 under drought. CB 229 had low reduction per cent of photosynthesis (45.25%), Ci/Ca (23.88%), conductance (52.38%) and RWC (25.72%) compared to susceptible parent IR64. Number of filled grains was much higher in Apo, CB229 and CB 193-3 when compared to IR64 under stress condition. The significant reduction in single plant yield under moisture stress condition was observed in all the genotypes especially in IR64 (65.15%). Reduction was relatively less in the donor Apo and BILs. CB 229 showed a greater RWC, conductance, moderate transpiration rate, increased water uptake, a higher assimilation rate and a higher grain yield under the moisture stress condition compared to the other BIL and IR64. It was found that CB 229 with three QTL, i.e., qDTY2.2, qDTY3.1 and qDTY8.1, showed better performance than CB 193-3 with two QTL, qDTY3.1 and qDTY8.1, under severe stress while in irrigated condition CB 229 was onpar with IR64.


Keywords: Oryza sativa, Drought, Backcross Inbred Lines
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How to cite this article:

Baghyalakshmi, K., P. Jeyaprakash, S. Ramchander, T. Radhamani and Raveendran, M. 2018. Comparative Study on Backcross Inbred Lines of IR64 Rice (Oryza sativa L.) Introgressed with Drought QTLs under Varied Moisture Regimes over Different Seasons.Int.J.Curr.Microbiol.App.Sci. 7(1): 2716-2725. doi: https://doi.org/10.20546/ijcmas.2018.701.325