【摘要】 报道了籼型优质米新不育系金２３Ａ与繁殖、制种有关的一些基本特性，并对金２３Ａ繁殖、制种高产技术进行了系统地阐述．更多还原

【Abstract】 Jin 23A is a newly-developed CMS line with the characteristics of good plant type, strong til- lering ability, stable and high sterility, good combining ability and fine gum quality. It telongs to me- dium-maturing early he with strong astrong response to temperature.Seeded at Changde of Hunan in spring, it has the duration and effective accumulated ternperature (EAT) from sowing to initial heading of 62 - 74 days and 698 - 763℃, the main oh of 11- 11.6 leaves, the panicle -bearing tiller percentage of 72.5%. It heads even- ly with 4 - 5 days from initial to full heading stage, 6 - 7 days from indtial to full blooming. In the ear- ly-summer season seed production, its anthesis time is early with 69.13% spikelets blooming before noon, and after GA3 spraying, the stigma exsertion at and the exsertion late of both stigmas are 91.22% and 80.45% respectively, the seed set more then 50%. According to the charactersitics of Jin 23A, it is required that the productive panicles should be up to 3 mil./ha, spikelets up to An mil./ha in the seed production and if the supply of pollens sufficient, the seed yield may be over 3.75t/ha.更多还原