Phenological, Morpho-Agronomic and Floral Characterization of Promising Thermo Sensitive Genic Male Sterile Rice (Oryza Sativa L.) Lines Suitable for Kerala

By : Niya Celine V. J, Shabana R, Roy Stephen, Manju R.V.

Page No: 133-139

Abstract
Hybrid rice technology exploiting thermosensitive genic male sterility or TGMS is gaining much importance in declining rice production scenario. In this present study, we aim to identify the critical temperature requirements and thermosensitive period in selected TGMS lines along with their morphological and floral characterization to understand the outcrossing potential. Two TGMS lines, EC720903 and EC720904 were imported from IRRI for the present study. Results have shown that the line EC720903 performed better with short stature, early maturity, more number of productive tillers, wider glume opening, higher panicle and stigma exertion, more number of filled grains and longer panicle length. The line EC720903 was found to be a better candidate for tropical Kerala condition with critical sterility period of 15-22 days before heading and the sterility inducing average temperature of 26.9°C.

Authors :
Niya Celine V. J., Roy Stephen, Manju R. V and Shabana R : Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala, India.