籼稻芽变103S的主要特征特性观察

芽变 10 3S是水稻三系不育系选育过程中发现的芽突变体选育成的籼稻温敏型两系不育系 .在福州( 2 6°0 5′N)低海拔地区 3月 6日至 8月 8日播期范围内 ,穗前生育期 61.0 - 98.3d,平均 72 .0 5d,接近三系不育系珍汕 97A和龙特甫 A的中值 .芽变 10 3S的花粉育性转换温度指标为日均温 2 5℃左右 ,在超标温度下持续3d以上花粉育性才可彻底转换 .在福州 ,可供繁殖的时间有春、秋两季 .春繁 ,5月中旬至 6月上旬抽穗 ,适宜抽穗期长达 30 d;秋繁 ,宜 10月上、中旬抽穗 ,适宜抽穗期为 2 0 d左右 .安全制种期 ,宜 7月 1日至 9月 15日抽穗 ,适宜抽穗期 75d.芽变 10 3S在全败育期间 ,花粉很少 ,甚至没有花粉 .芽变 10 3S还具有花时早、开花集中、柱头发达、外露率高、活力强、亲和性好、米粒细长及米质优等优良性状 ,是一个综合性状好的两系不育系

Characters of indica sterile line 103S

S was a temperature sensitive two line indica sterile line selected from bud mutation material found during three line sterile line selection. Sowed between March 6 and August 8 in low altitude area of Fuzhou, it needed 61.0 to 98.3 days (72.05 days on an average) to tassel, which was similar to the average of Zhenxan 97 and Longtepu A. The temperature index for fertility transformation was about 25 ℃ of day average, while continued higher temperature of more than 3 days was needed for complete fertility transform. In Fuzhou, propagation could be proceeded both in spring and autumn. In spring propagation, it tasseled between mid May and early June with a long adequate duration of 30 days; in autumn propagation, tasseling should be arranged in early or mid October(20 days in total). In the stage of producing hybrid seeds safely, its tasseling duration was 75 days. In complete sterile stage, 103S produced little or even no pollen. It was an outstanding two lined sterile line with many eminent characters such as early flowering, long exposed vigorous stigma, thin and long grain.