摘要
在玉米自交系Mo17的杂交后代中,发现了一份玉米矮杆突变材料,该突变材料表现为节间缩短、植株严重矮化、簇生、花器官发育异常。该突变株与不同核背景玉米自交系(Mo17、B73、B77和W22)杂交衍生的后代群体中,出现了矮杆株与株高正常株两种类型,矮杆株数与株高正常株数的比例为1∶1。分离群体中株高正常的植株自交,后代株高均正常。鉴于突变表型是在F1出现,同时结合多年多点田间表型调查的数据,初步推断该矮杆性状是由显性单基因控制。利用SSR分子标记,将该基因定位于玉米第2染色体上,为该基因的克隆工作奠定了基础。
A maize dwarf mutant was observed in progenies derived from Mo17 hybrid. The dwarf mutant is characteristic of shortened internode,abnormal inflorescence,delaying flowering,etc. In the segregating population which were generated from the mutant crossed with different maize inbred lines Mo17,B73,B77 and W22,plants with dwarf and normal phenotype were identified. The segregation ratio is 1（dwarf plants） ∶ 1（normal plants） . Additionally,progenies from normal plants self-pollination are all with normal plant height. Based on the phenotypic data,we speculated that the maize dwarf mutant is controlled by a single dominant gene. Moreover,the dominant dwarf locus was mapped on maize chromosome 2 using the segregating population derived from the mutant crossed with maize inbred line Mo17. This study will lay a foundation for cloning the dwarf mutant gene in the future.
出处
《华北农学报》
CSCD
北大核心
2010年第5期90-93,共4页
Acta Agriculturae Boreali-Sinica
基金
江苏省高校自然科学研究项目(09KJB180010)
扬州大学高层次人才科研基金项目(nxy5286)
