Results 21 to 30 of about 5,995 (167)
国内虹鳟代表性养殖群体的高通量SNP芯片检测及遗传分析 [PDF]
, 2018 本研究旨在对国内虹鳟(Oncorhynchus mykiss)代表性养殖群体开展全基因组水平的遗传评估。利用57K单核苷酸多态性(single nucleotide polymorphism,SNP)芯片,检测了来自不同地域的6个虹鳟养殖群体样本共计48尾,包括黑龙江虹鳟、黑龙江金鳟、四川虹鳟、四川金鳟、北京虹鳟和北京金鳟,共获得有效SNP位点50201个,在中国虹鳟中的多态比例达到97.7%,表明该芯片虽然基于美国和挪威虹鳟群体设计,但对中国群体同样具有良好的适用性。各群体最小等位基因频率均值为0 ...
Gao Guangtu +8 more
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2019 大花无柱兰是一种珍稀兰科植物，具有一定的观赏和药用价值，但数量十分稀少，该物种亟待保护。本研究采用SRAP 分子标记技术，对10 个居群的115 份DNA 样品进行PCR 扩增，并开展遗传多样性分析。从81 对引物中筛选出9 个条带清晰、多态性好、重复性高的引物组合，共扩增得到305 条谱带。在物种水平上，多态性比率（PPB） 为100%，Nei’s 基因多样性指数（H） 为0.209 8，Shannon’s 指数（I） 为0.340 2；在居群水平上，PPB 为24.59%～52.13%，H 为0 ...
ZHOUMengying(周梦莹) +6 more
doaj +1 more source
汉族人群Y染色体多拷贝基因座DYS464遗传多态性 [PDF]
, 2006 【目的】 研究Y染色体多拷贝基因座DYS464遗传多态性在汉族群体中的分布规律。【方法】 选择106例汉族无亲缘关系男性个体作为研究对象，荧光标记引物PCR扩增DYS464基因座片段，ABl377自动测序仪上变性聚丙烯酰胺凝胶电泳分析PCR产物，并对不同重复序列分别测序。【结果】 DYS464基因座在106例汉族男性无关个体中发现有8种片段。变异11～18次。根据其中任意4种片段的组合，即片段大小和峰高的比率来命名等位基因，E-型命名方法，观察到61种等位基因，其中36种等位基因只出现1次 ...
伍新尧 +4 more
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Integrative Conservation, Volume 5, Issue 1, Page 137-149, March 2026.Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
Genetic Polymorphism of Y Chromosome Haplogroup D-M174 in East Asian Populations [PDF]
, 2019 Objective To explore the genetic polymorphism of Y chromosome D-M174 haplogroup and sub-haplogroups in East Asia. Methods The samples of 1 426 unrelated male individuals from East Asia were collected, and then 7 Y chromosome haplogroup D-M174 and the Y ...
QIAN En-fang, DENG Pan, HUANG Mei-sha，et al.
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 376-384, March 2026.ABSTRACT Objective To investigate whether combining abnormal morphological features observed on ultrasound in live pregnancies that ended in a first‐trimester miscarriage can predict an abnormal karyotype. Methods This retrospective observational cohort study was conducted at the early‐pregnancy assessment unit at University College London Hospital ...
T. Setty +5 more
wiley +1 more source
野生动物学报, 2019 大型猫科动物是顶级捕食者，它的存在依赖该地区的整个生态系统，也可以对整个地区的生态系统直接或间接产生强烈的影响。种群遗传学是保护遗传学的一个重要组成部分，对于野外种群来通过种群遗传学研究能了解种群的遗传多样性，种群大小，遗传结构等诸多信息。微卫星标记方法结合非损伤性取样方法在野生大型猫科动物保护遗传学的研究中有着重要地位，它具有诸多优点，广泛应用于种群遗传多样性、个体识别、亲缘关系鉴定等方面的研究。本文回顾大型猫科动物与微卫星标记方法的应用，虽然目前微卫星标记方法仍然具有一定的局限性，但是随着技术的发展，
王萌 1 朱思雨 2 薛茂盛 3 刘霖 3 任迎丰 3 李立新 3 许青 1 姜广顺 1
doaj
野生动物学报, 2022 绿孔雀(Pavo muticus)是备受关注的濒危物种。我国南方曾广泛分布的云南亚种(P.m.imperator)目前收缩到中部、南部和西部的局部地区,近年来陆续开展了野外种群调查,但遗传多样性的分析和评估尚未开展。本研究利用从玉溪市新平和峨山交界处采集的野外绿孔雀自然脱落的羽毛,采用11对微卫星标记分析遗传多样性和结构,并与国内主要圈养种群(建群者来自瑞丽地区和其他未确定的地点)进行比较。结果表明:该野生种群的遗传多样性较低,受到近交的影响,遗传多样性进一步丢失的风险较高。遗传结构上 ...
刘思霞 +8 more
doaj
Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan +17 more
wiley +1 more source