排序方式： 共有4条查询结果，搜索用时 187 毫秒
1
1.
《国土资源导刊》编辑部 《国土资源导刊(湖南)》2013,(10):1-1
113年前的春天,30岁的德国气象学家魏格纳在办公室挂着的世界地图上发现了一个奇妙的现象——大西洋两岸,南美洲和非洲的轮廓高度吻合,此后终其一生,魏格纳都在为探寻大陆之间奇妙的＂血缘关系＂而探索求证,直至50岁时为寻找格陵兰岛漂移证据而罹难身亡,他所开创的＂大陆漂移说＂被认为是地学史上的一次革命,堪与哥白尼的日心说和达尔文的进化论相媲美. 相似文献
2.
Five full-sib families of the Pacific oyster(Crassostrea gigas) larvae were used to study the mode of inheritance at eight microsatellite loci,and the feasibility of these markers for kinship estimate was also examined.All eight microsatellite loci were compatible with Mendelian inheritance.Neither evidence of sex-linked barriers to transmission nor evidence of major barriers to fertilization between gametes from the parents was shown.Three of the eight loci showed the presence of null alleles in four families,demonstrating the need to conduct comprehensive species-specific inheritance studies for microsatellite loci used in population genetic studies.Although the null allele heterozygotes were considered as homozygotes in the calculation of genetic distance,offspring from five full-sib families were unambiguously discriminated in the neighbor-joining dendrogram.This result indicates that the microsatellite markers may be capable of discriminating between related and unrelated oyster larvae in the absence of pedigree information,and is applicable to the investigation of the effective number of parents contributing to the hatchery population of the Pacific oyster. 相似文献
3.
Five full-sib families of the Pacific oyster （Crassostrea gigas） larvae were used to study the mode of inheritance at eight microsatellite loci, and the feasibility of these markers for kinship estimate was also examined. All eight microsatellite loci were compatible with Mendelian inheritance. Neither evidence of sex-linked barriers to transmission nor evidence of major barriers to fertilization between gametes from the parents was shown. Three of the eight loci showed the presence of null alleles in four families, demonstrating the need to conduct comprehensive species-specific inheritance studies for microsatellite loci used in population genetic studies. Although the null allele heterozygotes were considered as homozygotes in the calculation of genetic distance, offspring from five full-sib families were unambiguously discriminated in the neighbor-joining dendrogram. This result indicates that the microsatellite markers may be capable of discriminating between related and unrelated oyster larvae in the absence of pedigree information, and is applicable to the investigation of the effective number of parents contributing to the hatchery population of the Pacific oyster. 相似文献
4.
针对传统地图服务展示单一、信息固定，无法全面表达地理实体的多维度信息的局限，在深入分析地理实体特点的基础上，该文提出了一种“类血缘关系”地理实体服务与可视化方法，搭建面向城市服务的多表多维存储结构设计、模拟血缘关系构建地理实体检索与可视化方法，形成了集查询、检索和显示一体的全套解决方案，实现对地理实体的多角度展示和灵活扩展。基于上海国土信息平台的应用实验结果表明，该文设计的方法可以支持用户按需选择空间形态，灵活支撑各类融合信息的显示，进一步可按需组装提取用户所需作为信息分析和挖掘的基础。 相似文献
1