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Study on the genetic characteristic of improved lines which can broad temperate maize genetic basis, found new heterotic patterns, resolve the back and force situation, overcome the obstacle of high and super- high yield breeding, provide the technique guarantee for the sustainable development of Chinese maize production.

对改良系进行遗传研究，拓宽温带玉米的遗传基础，构建新的杂种优势模式，这将解决我国玉米育种徘徊不前的局面，克服玉米高产超高产育种的障碍，为我国玉米生产的可持续发展提供技术保障。

There was great diversity index among genetic trait of 50 barley. The anomic trait used as tested materials was analyzed by cluster. Cluster analysis showed that 50 barley could be classified into 5 groups at the level of GD 3.28; The 50 barleys were analyzed by A-PAGE to study genetic diversity of hordein.

各农艺性状的遗传多样性指数都较大，具有丰富的遗传多样性；对供试材料的农艺性状进行聚类分析，50份大麦材料在遗传距离3.28时可被聚为5大类。

Vallisneria spinulosa maintained high levels of genetic variation both at the species and at the population level. Partitioning of genetic diversity revealed a surprisingly low population differentiation as compared to other hydrophilous angiosperms.

利用等位酶和开发的微卫星标记研究了刺苦草在长江中下流域的遗传多样性和遗传结构，研究结果表明，刺苦草在居群水平和种水平都具有高的遗传多样性；居群间遗传分化程度非常小；居群间历史上存在长距离基因流。

RAPD ; Castanopsis hystrix ; genetic distance ; genetic diversity

RAPD技术；红锥；遗传距离；遗传多样性

Our molecular phylogenetic trees constructed by UPMGA and NJ methods were in general consistent with that based on biochemical,immunogenetic and cellular genetic markers except for differences in some populations.It was inferred from this study that all pig populations examined could be temporary classified into one breed,however,the population genetic character of Taihe Guanchao and Wanan Spotted pig populations should be further evaluated.

各类群的UPMGA和NJ聚类分析结果与采用生化、免疫和细胞遗传标记分析的结论不尽相同，在此基础上，结合现行分类方法，认为各受试猪群可暂时归并为赣中南花猪类型，但对泰和冠朝猪和万安花猪的品种归属性应作进一步分析。

The result ofpairwise Fst and Neutrality tests revealed significant genetic differentiation amongfour populations,and evolution of mtDNA COI gene incompliance with the Neutralitytheory.The genetic distance was the biggest between HEB and JXL,and was thesmallest between SDT and JXL among the 4 populations.

遗传多样性研究采用了线粒体DNA COI基因序列、RAPD和PCR-RFLP三种分子标记研究大猿叶甲4个地理种群的遗传结构和群体遗传多样性。1、对长约335bp的mtDNA COI片段进行序列分析，在4个群体64个个体中，共发现37个单倍型，总变异位点35个，多态位点29个，含量(63.68％)大于含量(36.32％)。4个地理种群的核苷酸多样性指数分别为，0.082、0.035、0.099、0.186。

The analysis revealed that the intervarietal genetic relationships of several varieties was related to their pedgree of the parent and most of the varieties had a narrow genetic base.

聚类分析表明，30个棉花品种可分为3组，品种间的遗传关系与品种自身的系谱有关，大多数品种的遗传基础比较狭窄。

Bidens pilosa var. radiata, one of the rapid expanding invasive weeds, has become prevailing throughout Taiwan. A study on the result enhanced by the breakdown of geographic isolation with the native varieties in genetic variation, population structure and introgressive hybrization is really in need. In this study the genetic variation and population structure among the varieties of Bidens pilosa complex were studied using ISSR markers.

在台湾Bidens pilosa种群在外部形态及分布上均非常类似，加上大花咸丰草又属极具侵略性的新归化种，在与其他自生变种又无明显隔离下，是否增加种间之交流与渐渗杂交之机会及对族群结构的影响，实有深入探讨之必要。

Great genetic variance was detected in non-recurrent parents of the near isogenic line to powdery mildew, and good genetic consistency was found in the NILs.

4本实验室选育的近等基因系供体亲本之间存在很大的遗传差异，而近等基因系选系之间已达到很高的遗传一致性。

Genetic diversity of Juglans are summarized from the level of DNA molecular, the somatic embryogenesis, the establishment of genetic transformation and transgenic research in Juglans. Major

从DNA分子水平系统综述了核桃属植物遗传多样性的研究概况，总结了核桃属植物体细胞胚发生、遗传转化体系的建立及转基因研究进展，分析了核桃属植物分子水平遗传多样性与转基因研究过程中存在的主要问题，并对其应用和发展前景进行了展望。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。