Marker Assisted Characterization of TGMS Gene in Rice Cultigen Ts 29 (Oryza Sativa L.) to Develop Two Line Hybrids

The application of the thermsensitive genic male sterility (TGMS) system has great potential for revolutionizing hybrid rice production through simple and effective seed production technology. For the successful utilization of this novel male sterility system, knowledge of the fertility behaviour and genetic control of a TGMS line is essential. In this study, an investigation was carried out to characterize the TGMS gene present in the mapping population of TS 29 x CO(R)49. Through Bulk Segregant Analysis RM 3476 alone produced a polymorphic relationship between the parents and corresponding bulks and was used for surveying the individual plants of F3/F4 population. The marker RM 3476 produced contrasting fragments between sterile and fertile plants. The result was associated with the phenotypic observations on pollen fertility under the field conditions, confirming co-segregation of the marker with the gene of interest. Hence, the tight linkage of marker with TGMS gene was identified by RM 3476 which was already identified as a marker located near tms 6 gene in chromosome 5. From this study four TGMS lines were also identified with desirable floral traits for high out crossing and medium slender grain type. Bangladesh J. Bot. 53(2): 345-351, 2024 (June)