水稻花器官数目突变体fon6的研究初报  

A Preliminary Study on the Floral Organ Number Mutant fon6 in Rice

作　　者：赵福永[1,2] 王洁雅[1] 黄显波[3] 邓则勤[3] 林成豹[3] 严寒[1] 田志宏[1,2] 

机构地区：[1]长江大学生命科学学院,湖北荆州434025 [2]长江大学长江中游湿地农业教育部工程研究中心,湖北荆州434025 [3]三明市农业科学研究所,福建沙县365509

出　　处：《杂交水稻》2011年第2期52-57,共6页Hybrid Rice

基　　金：科技部农业科技成果转化资金项目(2009GB2D100235);湖北省教育厅科学技术研究项目(Q20101302);福建省科技重大专项(2008NZ0001-1)

摘　　要：fon6是在籼稻恢复系乐恢188/明恢62杂交F3代发现的花器官数目突变体,表型分析结果表明:该突变体小花颖壳畸形扭曲、内颖长于外颖不闭合;每朵小花内外颖壳总数目2～4片;雄蕊数目为1～14枚;雌蕊数目增加,子房数目2～6个,胚囊畸形。突变体套袋自交结实率为14.06%,花粉活力较高,平均花粉可染率为91.86%。自交种子能正常萌发成苗,突变性状表现稳定的遗传特性。以突变体为父本分别与蜀恢527、明恢63杂交,F2代群体中正常株与突变株的分离均符合3∶1的比例,F3代及BC1F2代进一步的观察与统计结果均表明,该突变性状受1对隐性核基因控制,将该突变基因暂定名为fon6(floral organ number6)。fon6 is a mutant in the number of floral organs of rice discovered in the F3 generation of the cross Lehui 188/Minghui 62.The survey on morphology showed that it had a malformed floret with open twisted glumes,there were 2~4 paleae and lemmas,1~14 stamens,more pistils with 2~6 ovaries and malformed embryo sacs in a floret.The mutant had a lower selfed seed set at 14.06% but a high pollen vigor with 91.86% of averaged I2-KI stained pollen rate.The selfed seed could germinate and grow into seedlings normally.The mutant trait was inheritable.The F2 generation of the crosses of the mutant as the male with Shuhui 527 and Minghui 63 as the female showed a segregation ratio of 3∶1 between normal and mutant plants.Moreover,the investigation on the segregation ratio in the trait of their F3 and BC1F2 populations was also conducted.The results of the genetic analysis indicated that the mutant trait was controlled by one pair of recessive nucleic genes.The mutant gene was tentatively designated as fon6（floral organ number 6）.

关 键 词：水稻 花器官数目突变体 fon6 表型特征 遗传分析 

分 类 号：S511.01[农业科学—作物学] Q944.58[生物学—植物学]