Results 11 to 20 of about 5,044 (193)
Population genetic variation and symbiotic and associated bacteria diversity studies of bryozoan Bugula neritina based on high-throughput sequencing [PDF]
多室草苔虫是一种重要的药源生物,从这种生物体内提取出的多种草苔虫内酯被证明有着较强的抗癌活性,其中草苔虫内酯bryostatin1是治疗阿尔茨海默症和多种癌症的最有希望的药物来源,而草苔虫内酯bryostatin1的产生与多室草苔虫体内的共生细菌“CandidatusEndobugulasertula”密切相关。然而,国内学者从中国沿海的多室草苔虫中却一直未能成功提取出这种最具药用价值的草苔虫内酯bryostatin1 ...
李海
core
Key Largo woodrats are a small and endangered island species, whose individuals tend to occur in family groups. Isolation from mainland populations, predation, and habitat fragmentation have caused genetic drift, leading to low overall diversity. Here, we found that a major category 4 hurricane promoted genetic diversity in the Key Largo woodrat ...
Taylor Ackley +5 more
wiley +1 more source
Mating system, brood parasitism and extra-pair behaviour in the Chinese egret (Egretta eulophotes) basing on the microsatellite technology [PDF]
动物的婚配制度影响着个体的繁殖成功率,直接关系到群体的遗传多样性和种群动态的发展变化,是保护遗传学和生态学领域中非常重要的研究内容。已有学者野外观察到黄嘴白鹭(Egrettaeulophotes)存在婚外交配(EPC)行为,然而,有关黄嘴白鹭的婚配制度、EPC的产生机制以及其是否会导致婚外父权(EPP)现象还未清楚。此外,许多集群繁殖的鸟类都存在种内巢寄生(CBP)现象,而关于黄嘴白鹭巢寄生行为的研究也尚未开展。因此,本研究围绕黄嘴白鹭的婚配制度问题,主要开展以下几方面研究: (1)对3种非损伤性样品 ...
戴宇飞
core
Using a diagnostic mitochondrial marker gene, we document the presence of furry‐eared dwarf lemurs, a species known from Madagascar's eastern montane rainforests, in several forest fragments across the island's central highlands. These findings raise new questions about when this species colonized these sites, how they tolerate these changing and ...
Marina B. Blanco +27 more
wiley +1 more source
为揭示喜马拉雅旱獭(Marmota himalayana)的遗传进化机制,基于双酶切RAD(dd-RAD)测序技术,对青海省3个地区(乐都、玉树、黄南)44例喜马拉雅旱獭简化基因组测序分析,通过SNP位点刻画其遗传特性,构建系统进化树,分析种群结构特征,从基因水平分析不同地区个体之间的遗传进化关系。结果显示:3个地区喜马拉雅旱獭共获得19 279 845个SNP位点,具有丰富的遗传多样性,各地区喜马拉雅旱獭的观测杂合度(Ho)为0.236~0.269,期望杂合度(He)为0.232~0.254 ...
李优, 南新营, 赵坤钰, 李耀东
doaj
Classification and phylogeographical analyses of Siphonaria and Cellana limpets in China and Southeast [PDF]
探究岩相潮间带生物的多样性以及分布格局的形成机制不仅有助于我们了解不同时空尺度下历史和当代环境因素的作用结果,而且为全球变化和人类活动背景下预报未来生物群落的动态变化提供了理论依据。快速发展的生物地理学和系统地理学的理论知识和分析方法已成为探究生物多样性的有效工具。本研究在此背景下对广泛分布于中国及东南亚岩相潮间带腹足纲中的帽贝属(Cellana)和菊花螺属(Siphonaria)进行了生物地理学和系统地理学分析,揭示了这两个属的贝类在东南亚沿岸的分布,并讨论了历史和当代因素在塑造嫁虫戚(C ...
王杰
core
Brief summary: Sri Lanka's biodiversity is threatened by habitat loss, climate change, and ineffective traditional conservation methods. Integrating plant tissue culture and DNA barcoding offers scalable, precise tools for conserving rare and endemic species.
Mylange Dona Kasundi Mekhala Gunasena +2 more
wiley +1 more source
为了实现固态变压器绝缘性能的提升,满足其电压等级提升和紧凑型一体化设计的需求,利用遗传算法与电场仿真联合方法优化了固态变压器高压连接处绝缘结构。首先通过建立一体化固态变压器的绝缘结构模型,计算了稳态电场分布状态及局域电场集中位置,发现高频变压器与电力电子模块连接处接地截止点局域最高电场达6.97 kV/mm,高于空气击穿强度。其次设计了圆弧形模块连接绝缘结构将接地截止点埋入固体绝缘介质中,并通过遗传算法与电场仿真联合方法优化了圆弧形结构尺寸参数,使得连接处最高电场转移至固体绝缘介质内部 ...
袁妮, 吴俊丽, 冷兆云
doaj
Genetic mapping and quantitative trait loci analysis of growth-related traits in the small abalone Haliotis diversicolor using next-generation sequencing [PDF]
杂色鲍(Haliotisdiversicolor)广泛分布于韩国、日本、中国、越南和菲利宾沿岸,是一种具有重要经济价值的养殖鲍种。应用传统的育种方式,杂色鲍育种工作虽然已经取得了一定进展,但是开展分子标记辅助选育仍然是加速该进程的必然选择。下一代测序技术可以高通量、低成本地完成SNP标记的发掘与分型,目前已被广泛应用于遗传研究的各个方面。本文利用下一代测序技术完成了杂色鲍的SNP标记开发与验证、高密度连锁图谱构建、QTL定位和候选基因的关联分析等工作。主要结果如下: (1) 杂色鲍高密度连锁图谱的构建 ...
任鹏
core
Institutional Legacies and Governance Models: A Comparative Study of Broadband State Aid in Europe
ABSTRACT This article explores how historical legacies and institutional configurations impact the governance models used in implementing State aid policies for broadband in France, Portugal, Spain, and the United Kingdom. The analysis is based on historical institutionalism, focusing on path dependence, critical junctures, and gradual institutional ...
Luís Manica +2 more
wiley +1 more source

