为了解水稻三系不育系黔 79A的特征特性,以便于其繁殖和制种,本文对黔 79A的开花习性进行了初步研究.结果表明:在贵阳生态条件下,黔 79A群体开花历时 12~14 d,单穗开花历时 6.8~8.2 d,始花后第4 天达到高峰,单日开花时间为 8:30-17:30,开花峰值在 11:30-12:30,午前开花率为 73.7%,柱头总外露率为 70.8%.由此表明,黔 79A是一个农艺性状较好、开花习性优良的水稻三系不育系.
In order to understand the characteristics of the CMS line rice Qian 79A,and to facilitate its reproduction and seed production,this paper conducted a preliminary study on the flowering habit of Qian 79A.The results showed that under the ecological conditions of Guiyang,the flowering duration of population and a single spike of Qian 79A was 12-14 days and 6.8-8.2 days,respectively.It reached the peak on the 4th day after flowering.In a single day,the flowering time was 8:30-17:30,the peak flowering time was 11:30-12:30,the flowering rate before noon was 73.7% ,and the total stigma exsertion rate was 70.8% .Therefore,Qian 79A is a CMS line rice with good agronomic traits and excellent flowering habits.