TWO-LINE HYBRID PRODUCTION SYSTEM AND THEIR APPLICATIONS IN RICE

PARDEEP KUMAR¹*, M.K. NAUTIYAL^2
1Department of Genetics and Plant Breeding, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttrakhand
²Department of Genetics and Plant Breeding, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttrakhand
* Corresponding Author : pardeep.kumar656@gmail.com

Received : 12-11-2016     Accepted : 16-12-2016     Published : 18-12-2016
Volume : 8     Issue : 61       Pages : 3502 - 3504
Int J Agr Sci 8.61 (2016):3502-3504

Keywords : TGMS, EGMS, CMS, Temperature, Hybrid and rice
Academic Editor : Rakesh Choudhary, Naveen Kumar V M
Conflict of Interest : None declared
Acknowledgements/Funding : Dr. M.K. Nautiyal, Professor, Department of Genetics and Plant Breeding, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttrakhand
Author Contribution : First Pardeep Kumar and Second M.K. Nautiyal

Rice is one of the most important world food crops, serving as the staple food for over one-third of the world’s population. Three line method or CMS system, which is possible and has been found to be most effective genetic tool for developing hybrids. Another efficient method is identification of a pollen sterility system that is dependent on temperature known as the thermo-sensitive genic male sterility called two line system. The TGMS system have three main advantages over the three line methods; no need of restorer line, no need of maintainer line and does not have any negative effect of cytoplasm. TGMS lines become sterile when the environmental temperature is higher than 25–30°C, during the panicle initiation and anthesis stages, and it convert fertile condition, when the temperature goes down below the 25–30°C. Two line method of hybrid seed production is more economic and efficient than to three line method.