Results 31 to 40 of about 6,924 (166)
Study on dispersal patterns of two introduction populations of Sonneratia apetala [PDF]
摘要 本研究通过对雷州附城和泉州泉港两个无瓣海桑引种种群进行野外调查、种群遗传结构分析及交配系统(亲本分析、花粉流及种子流)、种子萌发特性等方面的研究,探讨两个种群当前扩散格局的形成机制。 野外调查结果显示,泉州样地未发现无瓣海桑幼苗及幼树的散布,说明样地种群难以自然更新;雷州样地无瓣海桑引种林出现沿小河河道向上游大规模扩散的现象,其中河道上游扩散样方(20m*100m)散布着18株无瓣海桑幼苗、34株幼树、23株小树及2株大树;中游扩散样方(20m*100m)内分布着16株幼苗、20株幼树 ...
于庆阳
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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
筛选了10个微卫星位点对长白山北部地区的7个西伯利亚狍的局域种群进行遗传多样性和遗传结构分析。研究结果表明,7个西伯利亚种群遗传多样性水平均较高。等位基因数在7.3~11.1之间,平均等位基因数为8.95。等位基因丰富度整体水平较高,为7.5。观测杂合度和期望杂合度变化范围在0.7~0.76之间,种群遗传一致性较低,种群遗传多样性丰富、变异程度较高。7个种群中,仅黄泥河种群的Fis值为负值(-0.01),其余6个种群的Fis值均大于0,在0.021~0.061之间,表明种群内部可能存在一定程度的近交 ...
盛清宇 孙铁铎 张崇颖 罗理杨 姜广顺
doaj
Molecular cloning, expression of heat shock protein 60 (HSP60) gene in Marsupenaeus japonicus and the association of its polymorphisms with thermal tolerance [PDF]
日本囊对虾(Marsupenaeusjaponicus)是我国重要经济养殖虾类,但其在南方地区存在着高温度夏死亡率较高的养殖难题。因此,急需了解日本囊对虾的耐热性状及耐温的分子机制,为此,我们开展了日本囊对虾MjHSP60基因的克隆、表达分析及其多态性与耐热性状相关性的研究,获得了如下主要结果: 1.MjHSP60基因克隆 在日本囊对虾MjHSP60cDNA序列基础上克隆到了该基因DNA全序列。日本囊对虾MjHSP60基因全长4055bp,结构与拟穴青蟹一致,均由8个外显子及7个内含子构成 ...
李丽君
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The Genome of Phoebe zhennan (Lauraceae) and Comparative Genomics of Phoebe 楠木(樟科)基因组与楠属植物比较基因组学研究
Phoebe zhennan is a Chinese endemic and valuable timber species of Phoebe (Lauraceae). We present a chromosome‐level genome assembly of P. zhennan. Our research provides novel insights into the genome evolution of Phoebe, including whole‐genome duplication, phylogenetic relationships of magnoliids, and key MYB regulatory genes involved in lignin ...
Mao Yameng +3 more
wiley +1 more source
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
Ecological Function and Environmental Adaptation Mechanisms of Pelagic Archaea in Typical Areas of China Seas [PDF]
浮游古菌是海洋微型生物的重要组成之一。在真光层以下的深海大洋,海洋泉古菌MarineGroupI(MGI)类群的生物量可占总原核生物量的20%。最近,环境基因组学研究的突破性进展和海洋泉古菌MGI类群纯培养株系的获得揭示出大部分MGI类群都是氨氧化古菌(Ammonia-OxidizingArchaea,AOA)。由于MGI类群是海洋中数量最为丰富的微型生物之一,其必然在海洋碳、氮循环中起着重要作用,目前AOA已成为环境微生物生态学的研究热点之一 ...
胡安谊
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SSR Polymorphism of Alligator sinesis and Conservation Strategy of Genetic Diversity [PDF]
作者简介: 黄 磊( 1978- ) , 硕士研究生, 研究方向: 动物分子遗传 通讯作者。E-mail:wangyqnj@ jlonline. com[中文文摘]扬子鳄 (Alligatorsinensis)是中国特有的珍稀保护动物 ,为保护这一濒危物种 ,我国于 80年代初在安徽宣州先后建立了扬子鳄繁殖研究中心和国家级扬子鳄自然保护区 ,现饲养种群存鳄数量已达 10 0 0 0余头。为了揭示扬子鳄种群的遗传结构 ,共采集了 3 9个个体的样品 ,其中包括 6件剥制标本 ,按代系不同 ,分为野生群、
Eggleston, P +3 more
core +5 more sources
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. This review emphasizes the potential of biotechnological approaches to enhance conservation accuracy and ...
Mylange Dona Kasundi Mekhala Gunasena +2 more
wiley +1 more source
为探索东北地区野猪种群的遗传资源特征,本研究通过收集长白山北部林区5个地点的140份粪便样本,结合世界粮农组织(FAO)推荐的9个微卫星标记,使用Microsatellite Toolkit、GENEALEx软件计算相关遗传参数,评估各野猪局域种群的遗传多样性。研究结果表明,9个微卫星标记检测到的等位基因数目为6~15个,且PIC值为0.625~0.888,均为高度多态性位点。种群平均表观杂合度为0.760~0.813,平均期望杂合度为0.687~0.766,平均有效等位基因数为3.368~5.144个,
葛宝庆 胡素贤 孙铁铎 张崇颖 姜广顺
doaj

