GENETIC STUDIES ON THE PHOTOTHERMO SENSITIVE GENIC MALE STERILITY (PTGMS) AND ITS UTILIZATION IN RICE BREEDING.

El-Diasty, Z. M.; El-Mowafi, H. F.; Hammada, M. S.; Abdallah, R. M.

doi:10.21608/jpp.2008.166400

GENETIC STUDIES ON THE PHOTOTHERMO SENSITIVE GENIC MALE STERILITY (PTGMS) AND ITS UTILIZATION IN RICE BREEDING.

Document Type : Original Article

Authors

¹ Genetic Dept., faculty of Agric., Mansoura University, Egypt.

² Rice Res. and Training Center (RRTC), Sakha, kafr El-Sheikh, Egypt.

³ Genetic Dept., faculty of Agric.,Domiata Mansoura University, Egypt.

10.21608/jpp.2008.166400

Abstract

Studies of heterosis and combining ability of six photo /thermo-sensitive testers were estimated using line x tester analysis for some agronomic characters and yield and its components to get useful information for two-line system in hybrid rice breeding in Egypt .
The outstanding hybrid combinations for grain yield plant^-1 were PTGMS-5/Dular (45.26%) with significant standard heterosis for ,panicle length (28.22%) productive tillers plant^-1 (24.19%) ,panicle weight (26.93%) ,filled grains panicle^-1 (25.89%),spikelets panicle^-1(14.19%) ,spikelet fertility % (10.20% ) and 100-grain weight (35.62% ) .In the mean time ,PTGMS-14/Norin PL9,PTGM-7/Dular ,PTGMS-14/Giza178 and PTGMS-5/Giza 178 were considered as promising hybrids.
Among the six PTGMS lines,PTGMS-5 and PTGMS-14 were the best general combiners for grain yield and all studies characters.The testers , Dular , Giza178,M202 and Pecos were the best general combiners among testers for grain yield and most studies characters.