长穗颈温敏核不育水稻长选3S制种时GA_3的用量研究  

GA_3 Spraying Dosage for eui TGMS Rice Changxuan 3S in Its Hybrid Seed Production

作　　者：肖辉海[1] 王文龙[1] 郝小花[1] 

机构地区：[1]湖南文理学院生命科学学院,湖南常德415000

出　　处：《安徽农业科学》2010年第32期18110-18112,18135,共4页Journal of Anhui Agricultural Sciences

基　　金：湖南省科技厅科技计划项目(2008FJ3066);湖南省教育厅重点项目(09A066);湖南省自然科学基金项目(07JJ6032)

摘　　要：[目的]明确长穗颈温敏核不育水稻长选3S制种时GA3的用量。[方法]以长选3S及其亲本培矮64S为材料,在制种田对长选3S和培矮64S进行GA3不同用量的对比试验。[结果]长选3S在制种中喷施GA3以抽穗10%时为最佳时期,用量为90 g/hm2,分2次喷。在喷施90 g/hm2的条件下,长选3S的穗颈伸出度达到+1.78 cm,柱头外露率达到96.87%,比培矮64S高21.46个百分点;异交结实率达到36.44%,比培矮64S高16.33个百分点;长选3S/9311制种的理论产量达到2 931.90 kg/hm2,比培矮64S/9311增产1 259.40kg/hm2。[结论]长选3S比培矮64S对GA3更为敏感,可大大减少制种中GA3的用量。[Objective]Changxuan 3S was thermo-sensitive genicmale sterile（TGMS）rice selected from irradiated seeds of Peiai 64S by 350 Gy60Coγ-ray.The aim was to confirm GA3 spraying dosage of Changxuan 3S with eui gene in its hybrid seed production.[Method]Changxuan 3S possessing eui gene and its parent Peiai 64S were chosen as materials.Comparison studies on sensitivity to GA3 in their hybrid seed production were carried out.[Result]The suitable stage for spraying GA3 in the hybrid seed production of Changxuan 3S was at 10% of panicles headed;The optimal dosage was 90 g/hm2 with 2 split sprayings,the first spraying of 45 g/hm2 at heading of 10% panicles and the second one of 45 g/hm2 on the following day.Under the condition of spraying GA3 at the rate of 90 g/hm2,the panicle neck exsertions of Changxuan 3S was ＋1.78 cm,and exserted stigma rate and seed setting rate of Changxuan 3S were 96.87% and 36.44%,being 21.46% and 16.33% more than those of ＂Peiai 64S/9311＂,respectively.The theoretical yield of ＂Chuangxuan 3S/9311＂ reached 2 931.90 kg/hm2,which was increased by 1 259.40 kg/hm2 comparing with ＂Peiai 64S/9311＂.[Conclusion] Compared with Peiai 64S,Changxuan 3S is more sensitive to GA3,which results in no or little using GA3 in seed production of Changxuan 3S.Moreover,Changxuan 3S showed higher yield potential than Peiai 64S.

关 键 词：水稻 温敏核不育系 长穗颈 长选3S GA3用量 

分 类 号：S511[农业科学—作物学]