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连续两年对湖北农科院等单位提供的粳型光敏核不育系5047—1S等5份,籼型光敏核不育系W6154S等3份在吉林市(43°52′N)自然条件下的育性观察以及人工光照诱导育性转换特性的研究,并对光敏组合F_1进行考种分析,结果表明: 1.不同的光敏核不育系的临界光照长度不一样。粳型光敏核不育系有一个较为清晰的临界光长,而籼型的不明显。 2.相同的光照条件下,高温促进抽穗,育性表达进程加快;相同的温度条件下,长光照延迟抽穗期,育性表达进程缓慢。 3.在吉林市,从7月到8月上中旬,日照处理大于14小时,为光敏核不育系的不育期,此间可以杂交制种;并且光敏核不育系和正常水稻的盛花期基本—致,利于制种。 4.杂种F_1代的优势较为明显。抽穗期8月5日左右,结实率达25％以上,在穗长、每穗实粒数方面比对照秋光优势明显。
For two consecutive years, Hubei Academy of Agricultural Sciences and other units of japonica photo-sensitive genic male sterile line 5047-1S 5 copies, indica-type photo-sensitive genic male sterile line W6154S 3 copies in Jilin City (43 ° 52’N) under natural conditions Fertility observation and artificial light-induced fertility conversion characteristics of the photosensitive combinations F_1 test species analysis showed that: 1. The different photo-sensitive genic male sterile line of the critical length of light is not the same. Japonica type photo-sensitive genic male sterile line has a more clear critical light length, while the indica is not obvious. Under the same light conditions, high temperature promoted heading, and the process of fertility expression accelerated; Under the same temperature conditions, long light had delayed heading stage and fertility expression process was slow. 3. In Jilin City, from July to August in mid-upper, the sunshine processing for more than 14 hours, the sterile line of the photo-sensitive genic male sterile line, during which you can seed; and photosynthetic male sterile lines and normal rice flowering Basic - induced, conducive to seed. The hybrid F_1 generation has obvious advantages. The heading date was about August 5, and the seed setting rate was more than 25%. Compared with the control, the autumn has obvious advantages in spike length and grain number per panicle.