Location of <Emphasis Type="Italic">Vibrio anguillarum</Emphasis> resistance-associated trait loci in half-smooth tongue sole <Emphasis Type="Italic">Cynoglossus semilaevis</Emphasis> at its microsatellite linkage map     

汤志宏  郭栗  刘洋  邵长伟  陈松林  杨官品 《中国海洋湖沼学报》2016,34(6):1309-1319

A cultured female half-smooth tongue sole (Cynoglossus semilaevis) was crossed with a wild male, yielding the first filial generation of pseudo-testcrossing from which 200 fish were randomly selected to locate the Vibrio anguillarum resistance trait in half-smooth tongue sole at its microsatellite linkage map. In total, 129 microsatellites were arrayed into 18 linkage groups, ≥4 each. The map reconstructed was 852.85 cM in length with an average spacing of 7.68 cM, covering 72.07% of that expected (1 183.35 cM). The V. anguillarum resistance trait was a composite rather than a unit trait, which was tentatively partitioned into Survival time in Hours After V. anguillarum Infection (SHAVI) and Immunity of V. Anguillarum Infection (IVAI). Above a logarithm of the odds (LOD) threshold of 2.5, 18 loci relative to SHAVI and 3 relative to IVAI were identified. The 3 loci relative to IVAI explained 18.78%, 5.87% and 6.50% of the total phenotypic variation in immunity. The microsatellites bounding the 3 quantitative trait loci (QTLs) of IVAI may in future aid to the selection of V. anguillarum-immune half-smooth tongue sole varieties, and facilitate cloning the gene(s) controlling such immunity.  相似文献   

Practice and research progress on ecosystem conservation in transboundary areas     

Lina Tang  Liuming Gui  Guofan Shao  Luyan Wang  Longyu Shi 《中国地理科学(英文版)》2016,26(1):109-116

Many ecosystems extend across national or political boundaries. The consistent and effective protection of these ecosystems in transboundary areas(ETAs) is an important global research focus. Previous research on the protection of such areas can be categorized into seven themes: 1) ecological conservation of a single ETA; 2) investigation of the effects of a single conservation measure on a specific ETA; 3) determination of species-level effects due to ETA conservation; 4) comparison of the same protection measures between different ETAs; 5) introduction of a single conservation measure to a specific ETA; 6) understanding the relationship between conservation and sustainable development; and 7) generalization across multiple ETA conservation cases. The protection of ETAs involves various considerations, including funding support, demand and will for collaboration, community and public participation, historical and cultural factors, political backgrounds, uniqueness of biological resources, formulation of laws and regulations, founding of specialized administrative departments, non-governmental organizations, and fairness. Here, we briefly explain the research themes and considerations related to ETA conservation. The most important finding is that most major research themes do not focus on the challenges of ETA conservation. We use two nature reserves located between China and North Korea as examples to identify specific ways to improve ETA conservation on Changbai Mountains. The efficiency of ETA administration still remains low. The study of ETA conservation should focus on concrete regional information and aim to improve existing measures through the accumulation of experience.  相似文献   

川南綦江-赤水地区晚燕山期以来差异构造变形     

周立夫  陈孔全  唐永  汤济广 《地质科技情报》2016,(4):66-73

受到燕山晚期先后两期不同方向的挤压应力:大娄山SN向水平推挤作用、江南雪峰造山带SE-NW向的递进变形作用和喜山期整体的剧烈隆升作用,川南綦江-赤水地区晚白垩世以来发生显著差异构造变形。根据在多边界的条件下形成的多构造体系的联合与叠加现象,分析了本区构造演化时序。通过对本区典型地震剖面的的解释得出差异构造变形方式为滑脱褶皱冲断作用造成的收缩变形,并运用平衡剖面演化分析,计算了水平方向上的伸缩率;由点到线及面,运用声波时差法、磷灰石裂变径迹法、地震剖面趋势法和地质对比法恢复了各地区晚白垩世以来的剥蚀量,以此分析了研究区垂直方向上的隆升幅度。最后综合上述2个方向的构造形变量分级评价了各个构造单元的差异构造变形强度。  相似文献   

Optimal error growth of South Asian monsoon forecast associated with the uncertainties in the sea surface temperature     

Siraj Ul Islam  Youmin Tang  Peter L. Jackson 《Climate Dynamics》2016,46(5-6):1953-1975

  相似文献   

我国东北地区玉米冷害风险评估   总被引：4，自引：2，他引：2       下载免费PDF全文

唐余学  郭建平 《应用气象学报》2016,27(3):352-360

根据年平均寒积温水平,将东北地区的玉米冷害分成4个区域。在分析各冷害区域年寒积温距平与年减产率关系的基础上,确定东北地区各地无冷害影响年、一般冷害年、严重冷害年的年寒积温距平指标。将危险度、脆弱度和暴露度作为冷害风险的评估因子,建立了冷害风险评估指标体系,并应用层次分析法对各指标赋予权重。建立了冷害危险度与年平均寒积温的回归方程,利用地理因子构建了年平均寒积温空间格点化模型,应用地理信息系统推算东北地区玉米冷害危险度,由危险度、脆弱度和暴露度得到我国东北地区玉米冷害风险指数,并开展风险评估。结果表明:东北地区的玉米冷害风险空间分布呈北侧和南部低、东部中等、西部高,松嫩平原东北部和西北部以及吉林省中北部主要为较高或高风险区,三江平原主要为中等风险区,黑龙江省北部、吉林省东南部和辽宁省主要为较低或低风险区。  相似文献   

采用滞留水量的洪水淹没计算     

赵骞  邓轶  李东阳  吴志宜  陈文志 《测绘科学》2016,41(10):74-77

针对城市地区暴雨致洪问题以及快速、科学分析处理洪涝灾害的应急测绘保障服务工作要求,该文提出了一种基于滞留水量的洪水淹没计算分析方法。采用美国水土保持局提出的模型计算降雨产水量,结合区域排水能力,河网、湖泊、水库调蓄水能力和境外来水量,实现区域滞留水量计算分析;在此基础上,利用数字高程模型数据和洪水淹没分析方法,实现区域淹没水深和淹没范围计算分析。研究区实例计算验证结果表明:该方法能够满足应急测绘保障服务工作要求,快速为相关部门洪涝灾害分析提供科学决策依据。  相似文献   

Alteration of naruo porphyry Cu (Au) deposit in the duolong ore-concentration area,tibet北大核心CSCD     

Gao K.  Duo J.  Tang J.-X.  Zhang Z.  Song J.-L.  Ding S.  Song Y.  Lin B.  Feng J. 《矿物岩石地球化学通报》2016,(6):1226-1237

The Naruo Cu( Au) deposit is a large porphyry deposit in Bangonghu-Nujiang suture, and it is an important part of Duolong ore •concentration area. In this study, alteration and mineralization zoning were constrained by detailed field investigation and indoor petrography observation in order to characterize the alteration and establish alteration-zoning model for exploration. The deposit has typical porphyry hydrothermal alteration system with successively alteration zoning of potassium silicate zone( with later propylitization) to sericite zone( with later propylitization) , propylitic zone, and hornfel zone from inner outward. The mineralization is closely related to potassium silicification and sericitization.  相似文献   

老挝龙湖矿区ZK309农波组中盐段泥岩层硼的地球化学特征研究          下载免费PDF全文

唐启亮  张西营  韩元红 《盐湖研究》2016,24(1)

由于硼（B）在自然界中分布较集中,平均丰度低,而且11B和10B之间质量差大,分馏效应显著,故元素硼及其同位素组成可以作为判定硼来源的指相标志和沉积环境。老挝龙湖钾盐矿区是呵叻高原钾盐矿在老挝境内最主要的矿区之一,ZK309钻孔在龙湖矿区具有代表性,通过对该钻孔盐岩上覆碎屑层的硼元素及其同位素的分析,B含量（56×10-6～103×10-6, wt.%）,平均值为73×10-6;?11B的范围为+7.44‰到+11.62‰,平均+8.96‰,介于海水的?11B值（+39.5‰）及陆相地下水的δ11B值（-3±5‰）之间,B的含量认为中盐段岩盐层沉积后期曾明显有水流体的活动,这种水流体表现出偏向于淡水、咸水混合水特征,而B同位素研究认为粘土矿物的吸附作用是?11B降低的主要因素。  相似文献   

Industrial structure optimization in central China under the energy constraint     

Wei Sun  Wenhui Li  Zhipeng Tang  Jie Fan 《地理学报(英文版)》2016,26(9):1377-1388

Optimizing industrial structure is an important research object of human-economic geography, and it is also the object of government departments to strengthen macro-control. This has become even greater problem that China has entered the “new normal” in recent years. The study uses a multi-regional input-output model, with linear programming to build an optimal model of industrial structure as well as a model of optimization degree under the energy constraint. The results of the study revealed that: (1) the degree of optimization of industrial structure in Anhui Province is optimal (0.763), while that of Shanxi Province is the lowest (0.662); (2) the degree of optimization of industrial structure is negatively related to energy consumption per unit output value and the proportion of heavy industry; and (3) overall, central China should maintain or moderately increase the proportions of resource-based industry, greatly increase the proportions of manufacturing, including transport and telecommunications equipment, computers and other electronic equipment, and moderately reduce the proportions of smelting and pressing of metals and non-metal mineral products. In terms of service industries, the region should greatly increase the proportions of the production and supply of natural gas and tap water, moderately reduce or maintain the proportions of transport and storage as well as tourism, and maintain or moderately reduce the proportions of wholesale trade, retail trade and catering services.  相似文献   

基于BP模型和Ward法的北京市平谷区乡村地域功能评价与分区   总被引：13，自引：3，他引：10  

唐林楠  刘玉  潘瑜春  任艳敏 《地理科学》2016,36(10):1514-1521

构建乡村地域功能评价指标体系,借助BP神经网络模型揭示平谷区“生产-生活-生态”功能分异特征;运用Ward法划分功能区,服务于平谷区乡村转型发展和功能区布局。结果表明：① 在多项功能综合作用下,平谷区基本形成了“平原地区生产功能较强、镇中心及周边村域生活功能明显、山地区以生态功能为主”的功能分布格局。② 基于评价结果和空间属性,平谷区划分为西部平原生产区、东部山地生态生产区、中部平原城市生活区、中部近郊平原生活区、东部丘陵生态生活区和北部山地生态区。其中,西部平原生产区、中部平原城市生活区、北部山地生态区是平谷三生空间功能发展的优势区域,分布相对集中。按照“强功能重优化、中等功能重提升、弱功能重改善”的原则提升乡村地域功能,促进地区均衡发展。  相似文献