水稻光温敏核不育系不育基因的等位性研究  

The Allelism of Sterile Genes of Photothermosensitive Genic Male Sterile Lines in Rice,Oryza sativae

作　　者：邓晓建[1] 李仁端[1] 周开达[1] 杨仁崔[1] 

机构地区：[1]四川农业大学水稻研究所,福建农业大学作物遗传育种研究所

出　　处：《西南农业学报》1997年第4期1-6,共6页Southwest China Journal of Agricultural Sciences

摘　　要：对粳型光敏核不育系农垦５８Ｓ及其衍生的７个籼型光、温敏核不育系双列杂交组合Ｆ１和部分Ｆ２在长日高温和长日中温两种生态条件下的育性表现进行了研究。结果表明，光敏不育系农垦５８Ｓ、８９０２Ｓ和２８７７Ｓ、以及温敏不育系培矮６４Ｓ、８８０１Ｓ和２５５８Ｓ等６个不育系的不育主基因等位，温敏不育系Ｗ６１５４Ｓ和９２０２Ｓ的不育主基因等位，而前６个与后２个不育系的不育基因则非等位。不育主基因等位的Ｗ６１５４Ｓ和９２０２Ｓ杂交Ｆ２群体中不育株率１００％，而８９０２Ｓ、２８７７Ｓ、培矮６４Ｓ和２５５８Ｓ间杂交Ｆ２群体中有少量可育株出现。不育主基因等位的不育系间杂交Ｆ２群体中，可育株与不育株比例为２２５∶３１，表明双亲之间存在４对不育主基因的差异，控制Ｗ６１５４Ｓ和９２０２Ｓ不育性的２对主基因与控制８９０２Ｓ、２８７７Ｓ、培矮６４Ｓ和２５５８Ｓ不育性的２对主基因可能完全不等位。ertility of F1s and F2s of the diallel crosses between eight photo sensitive genic male　sterile (PGMS) and thermosensitive genic male　sterile (TGMS)lines,involving a japonica line Nongken 58S and its seven indica derivatives,were observed under two ecological conditions viz.long day with high temperature (LD+HT) and long day with medium temperature (LD+MT).The results showed that six lines,i.e. PGMS lines Nongken 58S,8902S and 2877S,TGMS lines Pei'ai 64S,8801S and 2558S,had allelic major-genes,but were non-allelic to that of the former six lines.The percentage of sterile plants was 100% in the F2 of the crosses between allelic lines W6154S and 9202S,but a few fertile plants appeared in the F2s of the crosses among allelic lines 8902S,2877S,Pei'ai 64S and 2558S.The F2 s of the crosses between non-allelic lines segregated in a ratio of 225 fertile to 31 sterile,which suggested that there were differences of four pairs of malesterile majorgenes between two parents,the two pairs of majorgenes governing malesterility of W6154S and 9202S were completely nonallelic to the two pairs of majorgenes governing sterility of 8902S,2877S,Pei'ai 64S and 2558S.

关 键 词：水稻 不育基因 等位性 光敏雄性不育 

分 类 号：S511.032[农业科学—作物学]