偃麦草

Through wide hybridization between wheat and Thinopyrum species, a lot of amphidiploid, addition, substitution and translocation lines were produced and many wheat cultivars were selected.

通过小麦与偃麦草的远缘杂交，创造了大批小麦一偃麦草双二倍体、异附加系、异代换系和易位系材料，选育了许多小麦新品种。

Using SDS-PAGE technique, HMW-GS of Thinopyrum were detected by analyzing Thinopyrum accessions, wheat-Th. elongatum 1E〓 substitution lines and wheat-Th. intermediam partial amphidiploid Zhong2. It was showed that the composition of HMW-GSs of Thinopyrum were distinctly different from which in wheat.

对偃麦草、二倍体长穗偃麦草1E中国春代换系、小麦—中间偃麦草部分双二倍体中〓高分子量谷蛋白亚基进行了SDS-PAGE分析，发现在偃麦草材料中存在不同于小麦的特异HMW-GS类型。

Repens L. and E. intermedia Nevski by using SSR, in order to provide science theories basis and base to further study E. repens L. drought resistance gene molecular marker, discover excellent drought resistance gene source , fast and efficiently select with the molecular marker of drought resistance gene catena for E.

通过对20 份来源不同的偃麦草与中间偃麦草种质材料在室内模拟逆境和田间干旱条件下进行抗旱材料的筛选和鉴定，应用SSR 技术对偃麦草抗旱分子标记进行引物筛选，为进一步深入研究偃麦草与中间偃麦草抗旱基因分子标记、发掘优异抗旱基因源，快速高效筛选出与偃麦草与中间偃麦草抗旱基因连锁的分子标记提供科学理论依据和基础。

That could be the results of unequal misdivision of wheat_rye 1BL/1RS translocation chromosome and Thinopyrum chromosome during meiosis.

在遗 42 12×遗 40 95的F2 代中检测到一个具有中间偃麦草染色体小片段易位到小麦染色体端粒部分的小麦_中间偃麦草易位植株。

There are bands of Triticum and Elytrigia in Tritielytrigia, they are new octoploid types that be different from Triticum and Elytrigia.

小偃麦兼有小麦和天蓝偃麦草的酶带，是不同于小麦和天蓝偃麦草的八倍体新类型。5个小偃麦划分成两种不同的类型，中_1和中_2属于第一种类型，中_3、中_4和中_5属于第二种类型。

Comparison of the micro-morphological characteristics of pollen grain and leaf epiderm among diaploid Thinopyrum elongatum, Elytrigia intermedia, common wheat and octoploid Tritielytrigia types were carried out by observation under scanning electronic microscope.

方法］通过扫描电镜对二倍体长穗偃麦草、中间偃麦草、普通小麦、和八倍体小偃麦的花粉粒和叶表面的微观形貌特征进行了比较。

Octoploid tritielytrigia type TAI-7045 showed immunity to yellow rust and middle resistance powdery mildew. CH-9916 is immune to yellow rust in seedling and adult stages, powdery mildew in seedling and adult stages, and their powdery mildew middle resistance. These suggested that the high powdery mildew-resistance in Octoploid tritielytrigia TAI-7045 had probably been transferred into common wheat.

通过对条锈病及白粉病抗性评价，结果表明：亲本八倍体小偃麦TAI-7045、小偃麦衍生系CH-9916对条锈病表现免疫，对白粉病表现中抗，而另一亲本"晋麦33"对条锈病、白粉病表现高感，推测小偃麦衍生系CH-9916抗条锈病及白粉病的基因均来源于代换的一对染色体——亲本八倍体小偃麦TAI-7045即来源于中间偃麦草。

Besides,two fertile hybrids were obtained from symmetric somatic hybridization between bread wheat and tall wheatgrass,both of which were phenotypically similar to the tall wheatgrass parent.

本实验室成功的进行了小麦与多种禾草的体细胞杂交，并在小麦与长穗偃麦草的对称与不对称体细胞杂交中分别获得了长穗偃麦草/小麦渐渗系和小麦/长穗偃麦草渐渗系。

The genomic DNA of Thinopyron intermedium labelled with biotin-16-dUTP was hybridized with the chromosomal DNA of Wheat-Th. intermedium addition Line Z,(2n = 44), which had a good resistance to barley yellow dwarf vims.

以生物素（Biotin－16－dUTP）标记中间偃麦草基因组 DNA为探针，与抗黄矮病小麦－中间偃麦草染色体异附加系Z6进行原位杂交，鉴定出附加的1对中间偃麦草染色体。

All lines showed a chromosome number of 2n = 42, five of them carried botha pair of wheat-rye (Triticum aestivum-Secale cereal ) 1BL/1RS translocation chromosomes and a pair ofAgropyron intermedium chromosomes, three carried a pair of Ai chromosomes only, three otherscarried a pair of 1BL/1RS chromosomes only, and one carried neither 1BL/1BS nor Ai chromosome.

结果表明，12份材料染色体数均为42，其中5份材料均具有一对小麦-黑麦(Triticum aestivum-Secalecereal)1BL/1RS易位染色体和一对中间偃麦草染色体、3份材料只具有一对中间偃麦草染色体、3份材料只具一对1BL/1RS染色体、1份材料无1BL/1RS和中间偃麦草染色体。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。