油用向日葵是世界五大油料作物之一,耐盐碱、耐旱、耐瘠、适应性广,主要分布在我国的内蒙、新疆、黑龙江等西北、华北、东北的半干旱、干旱地区。在这些地区,由于降雨量不足或分布不均,或没有灌溉条件,使得向日葵生产常常遭受干旱胁迫,所以抗旱节水是保证向日葵高产稳产的重要措施、也是向日葵遗传改良的主要育种目标。但由于作物抗旱性状属复杂的数量性状,基于基因定位基础上的分子育种就成为抗旱性遗传改良的一条高效育种方
A grating surface can drive the liquid crystal molecules to orientate along the direction parallel or vertical to the projected plane of the grating surface. Th
The pressure induced phase transitions of TiO2 from anatase to columbite structure and from rutile to columbite structure and the temperature induced phase tran
田麦良种“云麦37号(842—849)”由云南省农科院粮作所1980年春选用从贵州毕节地区农科所引入的抗三锈、矮秆、丰产、早熟的K74—12—6—2—2作母本,用Larm251与6082单交种F
This paper reports that the nanostructured β-FeSi2 bulk materials are prepared by a new synthesis process by combining melt spinning (MS) and subsequent spark
The effects of fast neutron irradiation on oxygen atoms in Czochralski silicon (CZ-Si) are investigated systemically by using Fourier transform infrared (FTIR)
我国马铃薯种植地域广泛,一年四季均有种植。生产中马铃薯常遭受低温霜冻的危害,特别是低温霜冻对南方冬种马铃薯影响较大。该论文以我国主要马铃薯栽培品种为材料,在国内首次对我国主要马铃薯品种进行了抗寒性分析,研究了马铃薯栽培品种低温驯化前的抗寒性及栽培品种的低温驯化能力,以及不同抗性材料抗寒相关基因表达差异。主要结果如下：1.以抗寒能力较强的S. acaule野生种材料03079--431为对照,采用室
Synchronization of a noise-perturbed generalized Lorenz system by using sliding mode control method is investigated in this paper. Two sliding mode control meth