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光敏核不育水稻(PGMR)的发现与深入研究给杂交粳稻的发展带来了新的途径,但易受气候条件影响的特点又制约了其应用的范围。因此,为了采用相应的育种手段在寒冷稻作区利用这种资源,尚需进一步弄清其在本生态区的表现特点。本文的目的是通过观察31116S等代表性的粳型PGMR的育性转换特性和开花习性,为有效地将其应用于寒地杂交粳稻的选育提供参考资料。1 材料与方法1989年自辽宁、武汉等地引入31116S、N5047S、6085S、6283S等4份有代表性的粳型PGMR,并经海南自交繁殖,1990年在吉林省农科院水稻试验田(43°31′N)分期播种(表1)。并以31116S为试材,每隔3～4d播种一批(图1),4叶1心时移栽大田,株行距13.3cm×30cm,3行区,每行20株。以31116S、N5047S、6085S、6283S为材料,设置13.0、13.5、14.0、14.5、15.0h 5种不同光照时间处理。具体做法是每处理用塑料槽种30株,株行距10cm×20cm,同一光长处理的不同材料种植于同一槽内,用3层黑布遮光严密。以上各不同处理在抽穗期用I_2-KI染色观察20个
The discovery and in-depth study of Photosensitive Genic Male Sterile Rice (PGMR) has brought new ways for the development of japonica hybrid rice. However, its susceptibility to climatic conditions restricts its application. Therefore, in order to make use of this resource in the cold paddy area by using the corresponding breeding methods, it is necessary to further understand the characteristics of its performance in this ecological zone. The purpose of this paper is to provide reference materials for the effective selection of winter japonica hybrid rice by observing the fertility transformation characteristics and flowering habits of 31116S and other representative japonica PGMRs. 1 Materials and Methods In 1989, four representative japonica PGMRs such as 31116S, N5047S, 6085S and 6283S were introduced from Liaoning and Wuhan, and propagated through Hainan self-fertilization. In 1990, they were cultivated in the paddy field of Jilin Academy of Agricultural Sciences (43 ° 31’N) sowing (Table 1). And 31116S as the test material, every 3 ~ 4d sowing a batch (Figure 1), 4 leaf 1 heart transplanting field, spacing of 13.3cm × 30cm, 3 rows of 20 lines. With 31116S, N5047S, 6085S, 6283S as materials, 13.0, 13.5, 14.0, 14.5 and 15.0 h were set up for 5 different light treatments. The specific approach is to deal with each plastic groove 30, spacing of 10cm × 20cm, the same light-processing of different materials planted in the same tank, with three layers of black cloth tightly. The above different treatments in the heading date with I_2-KI staining observed 20