MtDNA was successfully extracted from 31 ancient individual bones at the tombs of Turfan basin and Lubunouer. Through four overlapping primers, we got 30 nucleotide sequences of 363 bp length. Intermediate nucleotide ...MtDNA was successfully extracted from 31 ancient individual bones at the tombs of Turfan basin and Lubunouer. Through four overlapping primers, we got 30 nucleotide sequences of 363 bp length. Intermediate nucleotide diversity, and genetic distances, as well as mean pairwise variance, are compatible with ancient Turfan mtDNA pool being an admixture of eastern Asian and European lineages. Such phenomenon shows that prior to the time of ancient Turfan, an ancient mingling of Euro-Asian population in Turfan basin had existed. The ancient Luobunuoer was the relic of Xinjiang that was found in the earliest time and at the farthest orient. The mtDNA sequences of ancient Luobunuoer are consisted by European lineage completely, no trace of mixture with Asian lineage. From nucleotide diversity, and genetic distances and mean pairwise variance, it has close relationship with European populations.展开更多
通过调查马尾松中龄林的生长情况,对其群体遗传变异进行分析。结果表明,马尾松两广优良家系中龄林存在丰富的遗传变异,树高、胸径、材积和冠幅等性状在家系层次上有极显著或显著差异,这些差异主要由遗传因素制约,各性状受中度、中低度...通过调查马尾松中龄林的生长情况,对其群体遗传变异进行分析。结果表明,马尾松两广优良家系中龄林存在丰富的遗传变异,树高、胸径、材积和冠幅等性状在家系层次上有极显著或显著差异,这些差异主要由遗传因素制约,各性状受中度、中低度遗传控制。主成分分析表明,树高、胸径和材积为主要生长性状,它们的累积贡献率达89.54%。采用Structure Version 2.2软件进行群体遗传结构分析,将群体分成5大类,在第4组群中,广东的家系数量最多,且组群生长性状值最高;第2组群中广西的家系数量最多,而生长性状值仅次于第4组群。展开更多
目的:建立针对五大洲际人群(东亚、欧洲、非洲、大洋洲和美洲)的常染色体SNP复合检测体系,验证评价其人群区分效能。方法:从The Global AIMs Nano set中筛选出28个SNP位点进行复合检测体系的构建,用该体系检测来自16个人群的712份样本,...目的:建立针对五大洲际人群(东亚、欧洲、非洲、大洋洲和美洲)的常染色体SNP复合检测体系,验证评价其人群区分效能。方法:从The Global AIMs Nano set中筛选出28个SNP位点进行复合检测体系的构建,用该体系检测来自16个人群的712份样本,检测结果和千人基因组中的20个人群和CEPH库中的2个人群合并共计2 804份个体的分型数据,采用聚类分析方法和主成分分析方法进行体系效能评价。选取祖先成分大于90%的样本构建参考人群分型库,对140份个体样本进行群体匹配概率、个体主成分分析等人群来源推断,评估该体系在实际样本的人群来源区分能力。结果:该体系不仅能对五大洲际人群进行区分,而且对混合人群也有一定区分能力,对已知来源样本的祖先成分和人群匹配分析结果显示与其来源信息一致。结论:该体系能够实现对欧洲、东亚、非洲、美洲、大洋洲以及混合人群的区分,并能够推断个体祖先来源成分组成,在实际检案中可以进行推广应用。展开更多
文摘MtDNA was successfully extracted from 31 ancient individual bones at the tombs of Turfan basin and Lubunouer. Through four overlapping primers, we got 30 nucleotide sequences of 363 bp length. Intermediate nucleotide diversity, and genetic distances, as well as mean pairwise variance, are compatible with ancient Turfan mtDNA pool being an admixture of eastern Asian and European lineages. Such phenomenon shows that prior to the time of ancient Turfan, an ancient mingling of Euro-Asian population in Turfan basin had existed. The ancient Luobunuoer was the relic of Xinjiang that was found in the earliest time and at the farthest orient. The mtDNA sequences of ancient Luobunuoer are consisted by European lineage completely, no trace of mixture with Asian lineage. From nucleotide diversity, and genetic distances and mean pairwise variance, it has close relationship with European populations.
文摘通过调查马尾松中龄林的生长情况,对其群体遗传变异进行分析。结果表明,马尾松两广优良家系中龄林存在丰富的遗传变异,树高、胸径、材积和冠幅等性状在家系层次上有极显著或显著差异,这些差异主要由遗传因素制约,各性状受中度、中低度遗传控制。主成分分析表明,树高、胸径和材积为主要生长性状,它们的累积贡献率达89.54%。采用Structure Version 2.2软件进行群体遗传结构分析,将群体分成5大类,在第4组群中,广东的家系数量最多,且组群生长性状值最高;第2组群中广西的家系数量最多,而生长性状值仅次于第4组群。
