Results 41 to 50 of about 6,924 (166)

Chromosome Number Variation and Its Cytogenetical Mechanism in the Progeny of the Amphidiploid Involving Aegilops Ventricosa and TRiticum Durum

open access: yes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
doaj   +1 more source

Survey of viral diversity in the sediments of South China Sea [PDF]

open access: yes, 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
core  

Recommendations to Reinforce the Implementation of China's Updated National Key Protected Wild Plants List 关于强化实施中国新版《国家重点保护野生植物名录》的建议

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 527-533, December 2025.
The recommendations cover four key aspects namely the definition of the taxa require high priority in the biodiversity conservation management, enhanced flexibility and adaptivity of the implementation processes, enforced integration of research advancement to enable the sustainable usage of plant resources, and finally actions to propose transboundary
Shi‐Cheng Shao   +4 more
wiley   +1 more source

小扭口藓(Barbula indica)芽胞发育特征的实验研究 [PDF]

open access: yes, 2005
在光照培养箱中人工对照培养小扭口藓(Barbulaindica(Hook. )Spreng)的芽胞,显微镜下观察并记录其发育成配子体的全过程。结果表明:小扭口藓芽胞在3 ~4d即可萌发; 10d左右开始分化出绿丝体、轴丝体及假根; 18d,轴丝体上的侧枝顶端细胞以分生缢割的方式产生单细胞或多细胞芽胞; 40d,轴丝体上开始出现配子体原始细胞;之后,配子体原始细胞发育成桑椹状的幼小配子体。还对芽胞形态发育、生理生态及配子体发生过程的特点进行了分析和讨论。,CN 23-1480/
赵建成,黄士良,李敏,张元明,王晓蕊,范庆书
core  

Genetic Diversity and Phylogeographic Structure of the Edible Caterpillars of Gynanisa maja and Implications for the Sustainability of the Species in Namibia

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 405-415, September 2025.
Assessing the genetic diversity of edible insects harvested from the wild is a pre‐requisite for designing conservation and management policies. The caterpillars of Gynanisa maja (Saturniidae) are harvested in large numbers in mopane woodlands in southern Africa, where they represent a seasonal source of income and nutrition to many rural communities ...
Zwannda Nethavhani   +3 more
wiley   +1 more source

微卫星标记方法在大型猫科动物保护群遗传学研究中的应用与挑战

open access: yes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  

The cloning,expression and characterization of the Marsupenaeus japonicus ML gene (MjML) [PDF]

open access: yes, 2016
日本囊对虾(Marsupenaeusjaponicus)是我国四大养殖对虾品种之一,具有重要的经济价值。日本囊对虾幼体发育过程复杂,受精卵孵化后需要经过无节幼体,溞状幼体,糠虾幼体和仔虾4个发育阶段,发育过程中蜕皮频繁,蜕皮周期较短。近年来,随着日本囊对虾养殖规模的逐步扩大,各种细菌性疾病对其养殖业的发展造成了巨大的影响,并造成了严重的经济损失。 ML(MD-2-relatedLipid-recognition)家族为一类具有保守ML单结构域的蛋白质,能够直接和脂类结合 ...
徐伊桦
core  

Next‐Generation Sequencing of Fecal DNA: A Novel Insight Into the Mitogenome Phylogeography of the Snow Leopard (Panthera Uncia) 粪便dna的二代测序:对雪豹线粒体组谱系地理结构的新洞察

open access: yesIntegrative 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

Microeukaryotic community structure and diversity in Xiamen offshore waters and Shenhu Bay, Fujian [PDF]

open access: yes, 2015
微型真核浮游生物是海洋生态系统的重要组成成分,同时在海洋经典食物链和微食物网中发挥重要作用。该类群个体较小,对环境变化较为敏感,作为生产者、消费者和分解者的微型真核浮游生物在海洋生态系统的生物地球化学过程和生态健康评价等方面有着重要意义。本研究选择厦门岛近海海域和福建省泉州市深沪湾为例,对目标海区进行微型真核浮游生物样品的釆集,运用变性梯度凝胶电泳(DGGE)、克隆测序和高通量测序技术方法对微型真核浮游生物群落组成和多样性进行研究,分析其时空分布和群落结构特征 ...
于凌宇
core  

The Two Faces of Introgression in Conservation Biology 基因渗入在保育生物学中的双重面貌

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 339-344, September 2025.
Conservation biologist need to take into account the various aspects of introgression in their attempts to protect the species integrity and evolutionary potential of threatened species. To do so, they have to overcome the bias created by the Mayrian species concept that considers species as having distinct gene pools.
Harald Schneider, Charles H. Cannon
wiley   +1 more source

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