Results 31 to 40 of about 6,107 (167)
Study on dispersal patterns of two introduction populations of Sonneratia apetala [PDF]
, 2016 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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Integrative Conservation, Volume 4, Issue 3, Page 277-286, September 2025.This study provides an innovation to address the challenge in accessibility to samples and genetic markers in Snow leopard conservation genetic studies. We performed next‐generation sequencing (NGS) on 19 fecal samples obtained from the eastern Qinghai‐Tibet Plateau, and successfully assembled 17 complete mitogenome sequences (~16,720 bp) and ...
Chen Cheng +7 more
wiley +1 more source
野生动物学报, 2018 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]
, 2015 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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New Phytologist, Volume 247, Issue 5, Page 2086-2097, September 2025.Summary The importance of marine angiosperms, or seagrasses, as foundation species for marine coastal ecosystems is in marked contrast to their low species number of only 70 described taxa. Seagrass species tend to have very similar overall morphologies dictated by hydrodynamic forces of the ocean environment.
Xiaomei Zhang +14 more
wiley +1 more source
Ecological Solutions and Evidence, Volume 6, Issue 3, July–September 2025.Over the past three decades, a large number of natural wild soybean populations have been declining inexplicably or even have disappeared and their distribution area has significantly decreased in China, and population losses continue unabated. Therefore, this study investigated 20 herbaceous communities of wild soybeans in various habitats in ...
Ke‐Jing Wang, Xiang‐Hua Li
wiley +1 more source
Survey of viral diversity in the sediments of South China Sea [PDF]
, 2016 病毒是海洋生态系统中丰度最大，多样性最为丰富的微生物颗粒。海洋沉积物中的病毒丰度相比较海水中，要高1~2个数量级，并且其形态和基因型也更加多样。目前，人们对海洋沉积物中的病毒相关研究还比较少。为了增强对海洋沉积物中病毒的了解，本论文利用荧光显微镜法获得了珠江口沉积物以及南海北部和西部沉积物中病毒的丰度数据，并且通过病毒标记基因（g23&psbA）PCR扩增、克隆文库测序等分子技术获得了沉积物中T4类噬菌体和噬藻体类群的多样性信息。主要的研究结果： （1）荧光显微镜检测结果显示珠江口沉积物中病毒（4.49×
何茂求
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New Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar +3 more
wiley +1 more source
野生动物学报, 2018 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
浙江大学学报. 农业与生命科学版, 2000 关于六倍体普通小麦的起源，过去通常归结于通过远缘杂交和多倍体的进化。但这种进化模式无法解释每个种内存在的遗传多样性。
XIAO Jian-fu, DING Shou-ren
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