自育水稻三系不育系黔209A的开花习性

Study on Flowering Habit of Qian 209A,a Rice Three-line Sterile Line Bred by Guizhou Rice Institute

为掌握自育三系不育系黔209A的异交特性,以利于其繁、制种,对其开花习性进行初步研究。结果表明:在贵阳自然生态条件下,黔209A群体开花历时10~12d,单穗开花期约8d,开花后约第4天进入盛花期;开花时间为8:30-15:30,开花高峰期出现在11:30-12:30;午前开花率为80.43%,柱头外露率为82.3%,是一个开花习性优良、农艺性状较好的不育系。

The flowering habit of Qian 209 A,a rice three-line sterile line bred by Guizhou Rice Institute,is preliminarily studied to know well the out-crossing characteristics of Qian 209 A for its reproduction and seed production by experiment of net room.Results:The flowering duration of Qian209 Apopulation is 10~12 d.The flowering duration of single spike is 8 d.The fourth day after first flowering is at the full-flowering stage.The flowering time and peak flowering time is at 8:30~15:30 and11:30~12:30 respectively.The flowering rate before noon and stigma exsertion rate is 80.43% and 82.3% separately.Qian 209 A with good flowering habit and better agronomic trait should be used in production of hybrid rice.