新型粳稻光温敏核质互作不育系(SA)在海南的繁殖特性研究  

The Multiplication Characteristics of a New Japonica Photo(Thermo)-Sensitive Cytoplasmic Male Sterile Line(SA) in Hainan

作　　者：杜士云[1] 王守海[1] 王德正[1] 罗彦长[1] 吴爽[1] 

机构地区：[1]安徽省农业科学院水稻研究所/安徽省水稻遗传育种重点试验室,合肥230031

出　　处：《中国农学通报》2010年第21期94-99,共6页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金资助项目(30771379);国家高技术研究发展专项经费资助(2009AA101101)

摘　　要：为深入了解光温敏核质互作不育系(SA)繁殖特性,为生产上的利用提供依据,以选育的2310SA为材料,连续2年在海南春季进行了繁殖试验,从其生育特性及抽穗、开花特性及"九二〇"的喷施效应等方面作了全面地调查。结果表明,2310SA在海南繁殖是可行的。在合适的条件下,其异交结实率可达40%以上,折合理论繁殖产量为2.23t/hm2。2310SA在海南繁殖,与保持系2310S的播始历期、抽穗和开花特性一致。每公顷喷施75g"九二〇"时,2310SA株高即显著增高,但试验中不同量"九二〇",即每公顷喷施0、75、150、225、300、375g"九二〇"时,其异交结实率未见明显变化趋势。据此对2310SA在海南春季的高产繁殖技术进行了讨论。The new type of male sterile SA line was demonstrated to have more complete and stable male sterility and have specific multiplication character from other type of male sterile line.In order to offer help for its application,the multiplication trials of 2310SA was carried out during two successive spring season in hainan.The results indicated that it was feasible to multiply the seeds of 2310SA japonica line in hainan.The multiplication yields of existing 2310SA were 2.23 t/hm 2 with outcrossing rate of 40% under desirable conditions.Some identical multiplication characteristics were observed such as the days from the sowing to heading initiation,characteristics of heading and flowering between 2310SA and its maintainer line,2310S.Spraying a small number of GA 3,lower than 75 g per hectare,the plant height of 2310SA increased significantly.There was no significant effect of different dosages of GA 3,0 g,75 g,150 g,225 g,300 g,375 g per hectare,on outcrossing rate of 2310SA.Base on the experimental results,the multiplication technique and suited conditions of 2310SA for the high yield were further discussed.

关 键 词：粳稻 光温敏核质互作不育系 海南 繁殖特性 异交结实率 九二〇 

分 类 号：S511.22[农业科学—作物学]