四个籼型水稻雄性不育系春季在海南岛开花动态的研究

１９９６年３月在海南研究了４个籼型水稻雄性不育系各５个生茎穗和其５个单株全部穗子逐日开花动态及１天中各时段开花动态，研究表明，四个籼型不育系主茎穗始花１－２天后进入盛花，盛花持续２－３天，单株全部穗子开花２－３天后进行当日开花率达１０％以上时期，该时期持续４－５天；在每天开花中，无论主茎穗还是单株全穗子，四个籼型不育系午后花率占多数，始花到终花历时６－８小时，每日盛花高峰在１２：００－１４：０００

HA Study on Flowering Characteristics of FourCMS Lines in Indica Rice in Spring in Hainan Island

Four cytoplasmic male sterility(CMS) lines in indica rice (Oryza sativa subsp. hsien Ting)were used to studythe flowering characterstics of 5 main panicles and all panicles of the 5 plants respectively in Hainan Island in March1996. The results were as follow: one or two days after beginning flowering, the main panicles of all the 4 CMSlines got into their flowering peak, and lasted 2 or 3 days. Two or three days after beginning flowering, all panic1esof each plant flowered at a rate of more than 10% everyday for 4 or 5 days. Both in main panicles and in all paniclesof the 4 CMS lines, most spike1et opened afternoons. With in a day, from beginning to end of flowering, the 4CMS lines lasted 6 to 8hours with a peak time of spikelet opening at 12: 00 to 14: 00. From beginning to end offlowering peak, the 4 CMS lines were at 11: 00 to 16: 00.