搜索结果: 1-13 共查到“知识库 生物学 genetic structure”相关记录13条 . 查询时间(0.078 秒)
Genetic Structure Among 50 Species of the Northeastern Pacific Rocky Intertidal Community
Northeastern Pacific Rocky Community
2015/12/11
Comparing many species’ population genetic patterns across the same seascape can identify species with different levels of
structure, and suggest hypotheses about the processes that cause such variat...
A Method for Detecting Population Genetic Structure in Diverse, High Gene-Flow Species
Diverse High Gene-Flow Species
2015/12/11
Detecting small amounts of genetic subdivision across geographic space remains a persistent challenge. Often a failure to
detect genetic structure is mistaken for evidence of panmixia, when more powe...
Genetic Structure of and Evidence for Admixture between Western and Korean Native Pig Breeds Revealed by Single Nucleotide Polymorphisms
Admixture Genetic Diversity Korean Native Pig Single Nucleotide Polymorphism
2016/5/17
Comprehensive information on genetic diversity and introgression is desirable for the design of rational breed improvement and conservation programs. Despite the concerns regarding the genetic introgr...
Dispersal at a Snail’s Pace: Historical Processes Affect Contemporary Genetic Structure in the Exploited Wavy Top Snail (Megastraea undosa)
fisheries larval dispersal management
2015/12/11
We used population genetics to assess historical and modern demography of the exploited wavy top snail, Megastraea undosa,
which has a 5–10 day pelagic larval duration. Foot tissue was sampled from ...
Phylogeography and Population Genetic Structure of Amur Grayling Thymallus grubii in the Amur Basin
Amur Grayling Population Genetic Structure Phylogeography Mitochondrial DNA Control Region
2016/5/10
Amur grayling, Thymallus grubii, is an important economic cold freshwater fish originally found in the Amur basin. Currently, suffering from loss of habitat and shrinking population size, T. grubii is...
Fine-scale genetic structure and dispersal distance in the harvester ant Pogonomyrmex barbatus
dispersal distance Fine-scale genetic structure
2015/12/10
Dispersal has important genetic and evolutionary consequences. It is notoriously difficult to study in some ant
species, because reproductives fly from parent nests to
mating aggregation...
Genetic Structure of Mongolian Goat Populations Using Microsatellite Loci Analysis
Goat Mongolia Population Genetics Microsatellite Cashmere
2016/4/28
We studied genetic diversity and relationships among Mongolian goat populations on the basis of microsatellite DNA polymorphisms. DNA samples from eight populations (Bayandelger, Ulgii Red, Zavkhan Bu...
摘要群体遗传结构上的差异是遗传多样性的一种重要体现，对群体遗传结构的研究已有较久的历史，而其中的基因流研究近些年来越来越受到重视。它对群体遗传学、进化生物学、保护生物学、生态学有着极其重要的作用。虽然传统的群体遗传学能估测基因流大小，但它的精确性还有很大局限性。随着生物技术的进步，对基因流的研究逐渐向分子水平过渡，应用蛋白质电泳技术、分子标记技术(RAPD、RFLP、VNTR、ISSR、DNA测序...
柴达木山羊群体遗传结构及系统地位的研究Genetic Structure and Phylogeny Status of Chaidamu Goat Population
柴达木山羊 遗传检测 系统地位
2008/1/6
摘要采用简单随机抽样法对柴达木山羊群体进行了遗传检测，从毛色、外型特征、体尺、血液蛋白与DNA多态性等5个方面进行了群体遗传结构分析，并探索了其系统地位。结果表明：(1)毛色和形态特征的平均表型异质度分别为0.3419、0.5207；(2)血液蛋白在6个基因座上具有多态性，平均基因座杂合度为0.2584；(3)DNA-RAPD标记表现丰富的多样性，基因多样度为0.4085～0.5318。通过对柴达...
波尔山羊及其杂交改良后代群体遗传结构与亲缘关系研究 Studies of Genetic Structure and Genetic Relationship of Boer Goat and Its Upgrading Offspring to Tangshan Diary Goat
波尔山羊 杂交后代 遗传结构 亲缘关系 RAPD
2007/12/31
摘要利用RAPD标记和POPGENE、PHYLIP及SPSS等统计分析软件，研究了波尔山羊及其杂交改良后代群体的遗传结构及遗传亲缘关系。结果表明，波尔山羊与其杂交改良后代间特别是高代杂种间具有相似的多态基因座百分率、等位基因数和基因多样性。随着级进杂交改良代数的递增，高代杂种之间以及与改良亲本之间的群体遗传结构的差异逐渐缩小，群体间的基因分化降低，基因流动和遗传相似度增加，遗传距离缩小，高代杂种与...
Genetic Structure and Composition of Genetic Diversity in the Kouchi Sub-breed of the Japanese Brown Cattle Population
Genetic Diversity Genetic Structure Japanese Brown Pedigree Analysis Principal Component Analysis
2016/4/26
Japanese Brown cattle, one of the four domestic beef breeds in Japan, are suffering from numerical reduction due to economic pressure from profitable breeds. In this study, all the reproductive cows i...
Genealogical Relationship between Pedigree and Microsatellite Information and Analysis of Genetic Structure of a Highly Inbred Japanese Black Cattle Strain
Microsatellite Japanese Black Cattle Phylogenetic Tree
2016/4/18
Japanese Black cattle of Hyogo prefecture (Tajima strain) are famous for its ability to produce high-quality meat and have been maintained as a closed system for more than 80 years. In order to assess...
Genetic Structure of Mediterranean Sea Turtle Populations
Chelonia mydas Caretta caretta genetic diversity DNA sequence
2010/3/31
The mitochondrial DNA (mtDNA) control region sequences of two species ( Caretta caretta and Chelonia mydas) of sea turtles from the Mediterranean were analysed using samples from Northern Cyprus. Only...