STUDIES ON SELECTION OF HIGH QUALITY INDICA DUAL-PURPOSE GENIC MALE-STERILE LINES(DGML)

Sun Yiwei Liu Yibai He Haohua (Jiangxi Agricultural University)

Indica DGML;;High quality;;Selection

We selected more than 20 dual-purpose genic male-sterile lines in recent years.DGML 0821S was selected the progenies of K-7S/03,it's fertility and economic charac-ters were stable.Treating by sunbeam(long light)and artifical light(10 hours),the 0821S issterile under high temperature conditions.According to the observation of different seedingdate in 1991～1993,the stable sterile period of 0821S is from July 14～20 to september 13～17.In the pariod its percentage of sterile pollens was more than 99%,0% of the naturalseed setting rate.0821S started to changing fertile on and after september 13～19.There-fore,0821S is a Temperature-sensitive Genic Male-sterile Lines (TGML).The 0821S is early-season indica rice,the duration from seeding to intial heading of 60～63 days in early seeding date and 50 day in late seeding date,70cm of plant height,me-dium tillering power,90～104 panicles each spike,20.7g of 1000-grain weight,apiculuscolourless,long and thin grains (3.1 of length/width),translucent endosperm,not chalkyand good appearance quality.The 0821S have good flowering characters,53.6% of percen-tage of opencut stigmas.Using as a female parent,0821S was crossed with 4 indicavaricties.The F_1 showed large panicle and many grains and the good appearance quality.The 0821S have good combining ability on quality character.Thus it is a utility value indicaDGML.