Results 51 to 60 of about 26,437 (250)
Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks
Conservation Biology, EarlyView.Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang +8 more
wiley +1 more source
Genetic diversity of Noctiluca scintillans [PDF]
, 2016 夜光藻是一种常见的赤潮藻，在世界大部分近海海域均有分布。目前普遍认为夜光藻只有一个种，但还没有研究探索不同地理种群的夜光藻是否产生了种内变异。本研究通过单细胞PCR以及单细胞克隆文库的方法，比较了中国黄海、东海、南海，墨西哥湾以及阿拉伯海5个海域夜光藻核糖体基因的遗传多样性。主要研究结果如下： 1、发现22种ITS单倍型(n=103)，12种28S单倍型(n=25)，6种18S单倍型(n=31)；这3个基因的单倍型多样度(Hd)分别为0.824、0.670、0.557，核苷酸多样度(π)分别为0 ...
潘永柏
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Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, EarlyView.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
中国广东籍汉族人细胞色素 P4502E1 基因 5′ 侧翼区多态性
Zhongshan Daxue xuebao. Yixue kexue ban, 1999 目的: 探讨中国广东籍汉族人细胞色素 P4502E1 基因 5′侧翼区的多态性分布规律。 方法: 利用聚合酶链反应和 Rsa Ⅰ 、Pst Ⅰ限制性片段长度多态性( PCR-RFLP)技术对 82 名正常中国广东籍汉族人的细胞色素 P4502E1 基因 5′侧翼区的 多态性进行了检测。结果: 82名正常中国广东籍汉族人的细胞色素 P4502E1 基因 5′侧翼区 C1(Rsa Ⅰ +, Pst Ⅰ-)、C2(Rsa Ⅰ-, Pst Ⅰ +)等位基因频率分别为 0. 854, 0.
王 建 刘焯霖 黎锦如 邵 明 潘锡榜 陈 彪
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Conservation Biology, EarlyView.Abstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
V. Warwick‐Evans +3 more
wiley +1 more source
, 2012 利用泥鳅(Misgurnus anguillicaudatus)的微卫星引物跨种扩增大鳞副泥鳅(Paramisgurnus dabryanus),通过家系扩增、PCR产物测序筛选出6个座位,用于大鳞副泥鳅7个野生群体的遗传结构分析。结果显示,群体的平均等位基因数在3.167～4.833,平均观测杂合度(Ho)在0.248～0.417,平均期望杂合度(He)在0.379～0.505,多个座位存在零等位基因、杂合子缺失现象,显示大鳞副泥鳅种群遗传多样性较低。采用UPGMA法对7个群体基于DA遗传距离进行聚类,
俞小牧, 游翠红, 童金苟
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[Research advances in genetic polymorphisms in Kawasaki disease]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Dong MX, Wang XX, Jiao FY, Zhang WH.
europepmc +1 more source
Contribution of microcosm experiments to conservation science
Conservation Biology, EarlyView.Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern +3 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1998 目的: 研究中国汉族群体中 α -艾杜糖苷酶基因 D4S111 位点的遗传多态性 。方法: 采用扩增片段长度多态性 (Amp-FLP)分析技术,检测了广州地区汉族无血缘关系健康个体 97 名。结果: D4S111 位点, 在 97 名无关个体中发现 5 个等 位基因和 9 种基因型,等位基因片段长度为 830～ 510 bp, 基因频率为 0. 0 052～ 0. 3 608, PIC 为 0. 5 966,杂合性为 0.
光 炜 郭奕斌 林群娣 杜传书
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野生动物学报, 2020 黄颊长臂猿属于IUCN濒危物种，仅分布于老挝、越南和柬埔寨。该物种微卫星的研究尚未报道。本研究，对黄颊长臂猿SSR位点进行筛选，并对南京地区圈养黄颊长臂猿种群进行了遗传多样性分析，统计了等位基因数、有效等位基因数，计算了群体杂合度、多态信息含量（PIC）、亲缘系数等参数。结果显示，共获得黄颊长臂猿11个多态性微卫星位点，等位基因数在2—5之间，多态信息含量为0.175—0.701，观测杂合度（Ho）为0.067—0.8，期望杂合度（He）为0.191—0.770，其个体间亲缘系数普遍偏高 ...
陈蓉吕, 冉程家, 求傅, 兆水
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