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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 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(5): 2128-2135
DOI: https://doi.org/10.20546/ijcmas.2017.605.238


Study on Critical Stages and Critical Sterility Point of Thermo-Sensitive Genic Male Sterile Lines of Rice for Two Line Hybrid Production
K. Sai Rekha1*, M. Kumar2, R. Saraswathi, S. Mannonmani3 and M. Raveendran4
1Department of Rice,
2Department of Cotton,
3Department of Oilseeds,
4Centre for Plant Molecular Breeding and Biotechnology,Tamil Nadu Agricultural University, Coimbatore-003, India
*Corresponding author
Abstract:

The genic male sterile rice (GMS) sensitive to temperature during the panicle development period is a novel type of germplasm in rice, which is sterile under high temperature condition but fertile in low temperature condition. A number of TGMS lines have been popularly used in commercial seed production of hybrid rice in China and India. To fix the duration of critical sterility temperature expression of TGMS lines for hybrid seed production, eight TGMS lines developed by Department of Rice, Tamil Nadu Agricultural University were sown in weekly intervals from December 16, 2015 to January 27, 2016. Heading date and pollen sterility were observed on each line during every planting interval. The data showed that the critical stage for most of the TGMS lines occurred during panicle development stages and approximately 26 to 5 days before heading. The pollen sterility recorded on the plants raised at weekly interval revealed that all lines had stable sterile phase with 100% pollen sterility for more than 40 consecutive days during high temperature conditions. TGMS lines TNAU45S, TNAU60S, TNAU95S, GDR 61S and GDR 70S were identified to have critical sterility point (CSP) at a mean temperature of above 29˚C. The TGMS lines viz., TNAU45S, TNAU60S, TNAU 95S and GDR61S were performing stable even during mild changes in temperature and these lines are considered as stable lines and can be recommended for hybrid seed production. Evaluating TGMS lines using this new strategy was found to be more stable in terms of sterility expression and these lines can efficiently used for Two line hybrid production.


Keywords: TGMS, Critical Sterility Point, Two line hybrid, Critical stage, Critical sterility temperature
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How to cite this article:

Sai Rekha, K., M. Kumar, R. Saraswathi, S. Mannonmani and Raveendran, M. 2017. Study on Critical Stages and Critical Sterility Point of Thermo-Sensitive Genic Male Sterile Lines of Rice for Two Line Hybrid Production.Int.J.Curr.Microbiol.App.Sci. 6(5): 2128-2135. doi: https://doi.org/10.20546/ijcmas.2017.605.238