Obtained transgenic wheat expressing pac1 mediated by Agrobacterium is resistant against Barley yellow dwarf virus-GPV

In fission yeast （Schizosaccharomyces pombe）, pacl gene was cloned with 99.3% nucleotide sequence similarity with published pacl in GenBank. In pET-5α expression system, the expression product of cloned pacl in E. coil showed activity to degrade the double-strand RNA. Harboring the binary vector pBI121, which contains pacl gene, Agrobacterium tumefaciens strain LBA4404 was used to transform the wheat immature embryos precultured 7-10 d. After preregeneration, regeneration and selection culture stage, totally 41 G418 resistant plants were obtained, in which 25 lines were proved to integrate with transgene and express transgene normally by PCR, Dot blot, RT-PCR and ELISA detection. Antivirus test carried out on 25 positive lines with high dose of Barley yellow dwarf virus-GPV revealed that 12 lines had resistance to BVDV-GPV in low level, another 12 lines had resistance to BVDV- GPV in middle level, and 1 line showed resistance to BVDV-GPV in high level. However, both low and middle level of resistance plants showed no symptoms when infected by viruses at low dose, which suggested the dose-dependent effect of the resistance mediated by pacl to BYDV-GPV.     

灰色关联分析在大麦种质综合评价上的应用

应用灰色关联分析法对高蛋白大麦种质进行综合评价,结果表明,该方法简单易行、结果全面、客观。     

大麦、油菜的抗耐病性与过氧化物酶同工酶的关系

利用过氧化物酶同工酶分析比较了上海地区大麦抗、感黄花叶病的品种和油菜耐、感菌核病的品种间的酶谱差异。结果表明,两类作物的抗耐病性在酶谱上呈现相同趋势。感病品种的酶带数量和强度要高于抗耐病品种。试验显示,过氧化物酶同工酶分析可作为大麦、油菜抗病育种中的一个鉴定手段予以利用。     

一个新质源大麦核质互作雄性不育系96f7A的选育及其遗传研究

报道了大麦核质互作型雄性不育系96f7A的选育过程及其形态特征和主要农艺性状,并研究了其雄性不育性状的遗传。结果表明,96f7A为二棱皮大麦,开颖开花,花药瘦小,不开裂,不散粉,不育彻底,农艺性状较好,其不育性状受1对隐性基因控制。该不育系的不育细胞质来自四川大麦地方品种,核不育基因由核品种的核可育基因天然隐性突变产生。     

叶绿素缺乏大麦突变体叶绿体结构功能及生化特性的研究

突变大麦类囊体膜吸收光谱的蓝区峰值明显高于野生型;A683/A652比值较高;CD谱信号较弱,这说明其捕光色素蛋白复合物发生了变化。SDS-PAGE结果表明,突变大麦的Rubisco的水平与野生型一致,但在类囊体膜上分子量为24-30kD的LHCⅡ蛋白组分减少。     

105个大麦品种的酯酶同工酶研究

试验用聚丙烯酰胺凝胶电泳方法对１０５个大麦品种的叶和幼穗作了酶酯同工酶分析。结果表明：（１）叶和穗的酯酶同工酶酶谱有组织类型的差别,叶酯酶共可见２２条酶带,穗酯酶主要有１７条酶带;（２）不同品种之间酯酶同工酶存在差异,根据强活性酶带或主要酶带分布情况,大麦叶和穗的酯酶酶谱类型各可分为１２类,但在品种分类上具有相同性。     

云啤2号、大麦02-2和YS500氮肥效应研究

3个品种间产量差异不显著,高肥力、高种植水平以YS500和大麦02-2为主;中等肥力和旱地上可选用云啤2号,稳产性相对较好。亩产量随施氮量增加而增加,而亩施尿素55与45千克处理间产量差异不显著;云啤2号三种施氮量间产量差异不显著;大麦02-2亩施尿素55与35千克的产量差异显著而,45和35千克间不显著;YS500亩施尿素45、55千克处理与35千克的产量差异极显著。要获取高产应增施氮肥,YS500以亩施尿素55千克为佳,大麦02-2酌减,云啤2号再适当减少。