摘要： 本研究在国内外多年研究的基础上,利用玉米br-2基因的致矮特性,根据基因重组的原理,通过各种杂交方式和选择,使抗病、抗倒、窄叶片等许多优良基因与br-2基因很好地结合,克服了原br-2基因型矮生自交系节间短、叶宽重叠密集、雌雄不协调、授粉不良等一系列缺点,育成了一批具有应用价值的优良矮生系和冀单20号等矮生杂交种,在单基因矮生特性运用于玉米育种研究上取得了进展.
关键词:
br-2基因,
复交种,
定向选择
Abstract: On the basis of many years research work at home and abroad，utilizing the gene br-2 in maize controlling the dwarf characteristic, according to the principle of gene recombination, through various kinds of cross manner and selection, br-2 was recombined with some genes controlling desirable agronomic characters,such as disease resistance,lodging resistance and narrow leaf, and the disadvantages of original br-2 inbred lines were overcome, including short internode,wide and dense leaves, high barrenness and worse pollination, 11 number of better br-2 inbred lines and a single-cross hybrid variety (Jidan No, 20) had been breeded，the single-gene dwarf characteristics used to the research on maize breeding made new progress.
Key words:
br-2 gene,
Double-cross hybrid,
Select in direction
崔绍平, 孙世珍, 徐有, 郑积德, 李洪杰. 玉米br-2矮生基因利用的研究[J]. 华北农学报, 1990, 5(2): 7-12. doi: 10.3321/j.issn:1000-7091.1990.02.002.
Cui Shaoping, Sun Shizhen, Xu You, Zheng Jide, Li Hongjie. A Study on Util ization of a Dwarf Gene br-2 in Maize Breeding[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(2): 7-12. doi: 10.3321/j.issn:1000-7091.1990.02.002.