Geographic variation

Application of Canonical Correlation Analysis in the Research of Tree Species Geographic Variation

典型相关分析在树种地理变异研究中的应用

Discontinuous geographic variation is often set aside as a special case .

不连续地理变异，人们往往作为一种特殊情况把它分开。

A geographic variation pattern of Chinese fir

杉木地理种源变异模式

Study on the geographic variation of leaf oil of Cinnamomum camphora

樟树叶油地理变异的研究

A study on geographic variation and fine provenance selection in slash pine in Jiangsu

湿地松在江苏地理变异及优良种源的研究

Geographic Variation and Initial Selection for Wild Provenances of Polygonum Multiflorum

何首乌野生种质资源地理变异与种源初步选择

Correlation analysis showed that geographic variation pattern for growth and branchtraits changed prominently with location environment .

相关分析表明，木荷生长和分枝性状的地理变异模式因区试点环境条件差异而迥异。

Geographic variation of bird song , sometimes called dialect , has species specific stability and individuality .

鸟类鸣声结构的地理变异，有时也称鸟声方言，不仅具有一定的种群稳定性而且具有个体性。

Chemical Compositions and Geographic Variation in Flowers and Fruits of Tilia amurensis

紫椴花和果实化学成分及其地理变异

There is substantial geographic variation in the rates of epidural steroid injections within the United States .

结论：在联邦内硬膜外类固醇注射的使用率实际存在着地域性差异。

Analysis on taxonomic characters of Larix in Northeast of China ⅱ & geographic variation of seed scales and needle leaves

中国东北落叶松属植物分类学特征的分析Ⅱ&种鳞及针叶的地理变异

Geographic variation shows a negative clinal trend with latitude and positive clinal trend with longitude .

地理变异呈现纬度单负向渐变的趋势，经度则呈单正向渐变变异规律，并确定聊城、肥城、长清为平阴及其毗邻地区的最佳种源。

Small amounts of geographic variation have been demonstrated in several other traits , such as cortical concentration of certain monoterpene .

在其他几个性状上，亦经证明有少量地理变异，诸如皮部的某些单萜烯浓度。

Thus , the authors maintain , geographic variation may reflect higher detection rates due to improvements in health services and differences in access to medical care .

因此，作者认为，由于卫生服务的改善和可获得的医疗资源的差异，地理区域的不同可能会使疾病的检出率升高。

According to cluster analysis and the law of geographic variation , the populations were classified into two large groups : desert grassland group and typical grassland group .

结合聚类分析和地理变异规律把种群划分为两个大的种群组：荒漠化草原种群组和典型草原种群组。

Among the climatic factors which affect the geographic variation of tracheid morphological , moisture and rainfall are the principal factors , secondary is temperature .

影响管胞形态地理变异的气候因子中，水湿条件是主导因素，其次是温度。

The resin content in timber of Yunnan pine was mainly controled by hereditary substance , and also affected by the geographic variation of grow place .

云南松木材的松脂含量主要决定于遗传因素，但又受生长地理位置变异的影响。

This paper studied the geographic variation of the timber properties of10 Larix olgensis provenances in Liangshui and Caohekou experimental places .

以凉水、草河口两个试验点10个长白落叶松种源为对象研究其材性的地理变异。

A study on the geographic variation of the mineral nutrient in Masson pine ( pinus massoniana lamb . ) and the ash content is less than 3.0 % .

不同种源马尾松灰分矿质营养变异的研究灰分小于3%。

The set of 6-year height and dbh data from 15-locations provenances test of masson pine was used to evaluate stability of different seed sources and determine its geographic variation pattern and ecological basis .

利用15个试点的马尾松种源区试林测定材料，估算不同产地的遗传稳定性，探究其地理变异模式和生态学基础。第五章为测试过程；

There was no significant trend of geographic variation in 1 000 seeds ' mass , which were mainly related to the altitude of distribution locations , water , solar radiation , the length of frost_free period and the burning hot .

种子千粒质量无明显的地理变异规律，主要与分布地点的海拔高度、水分、太阳辐射及炎热状况的综合作用有关。

This paper analyses the data for 9 years obtained from two tested plantations of Chinese mahogany . The results indicated that the geographic variation of Chinese mahogany provenance was basically a south-north cline pattern that was parallel to latitude .

对两片种源试验林9a调查资料系统地研究，结果表明：香椿种源的地理变异基本上是与纬度相平行的南北倾斜的连续变异型式。

The reconstruction of Homo erectus cranium from tangshan , nanjing , and the geographic variation of Homo erectus in Middle Pleistocene uranium-series dating of fossil bones from Peking man cave-mixing model

南京汤山直立人头骨的复原和更新世中期直立人的地理变异周口店北京猿人洞骨化石铀系年龄数据&混合模式

The relationship between volatile oils which had zonal or geographic variation and morphological characteristics was much closer than the one between flavonoids and morphological characteristics . Houttuynia germplasm played a decisive role of the differences in major secondary metabolites . 3 .

挥发油类物质与形态特征关系较黄酮类成分密切，并呈经向或纬向地理变异。种质对鱼腥草主要次生代谢产物的差异起决定作用。

Cephalotaxus fortunei provenance trails including 25 seed sources from 11 provinces , located at Mingxi of Fujian and Anji of Zhejiang , was used to study geographic variation of seed and seedling character ( morphology and growth ) .

利用来自11个省区25个三尖杉种源在福建明溪和浙江安吉两试验点开展苗期测定，研究种子、苗木形态与生长性状的种源差异。

Geographic variation in incidence of esophageal cancer is very striking . There are several districts with high incidence of this disease in China . Screening of precancer and early stage cancer of esophagus is an important approach for reducing the incidence rate and death rate .

食管癌在我国呈现地域性高发的分布特点，筛查和发现癌前病变病例对于降低食管癌发病率和死亡率具有重要意义。

Autoxidation of Monoterpenes with Oxygen Catalyzed by Co ( acac ) _2 Supported on Silica Functionalized Imidazole Small amounts of geographic variation have been demonstrated in several other traits , such as cortical concentration of certain monoterpene .

咪唑修饰硅胶负载乙酰丙酮钴（Ⅱ）催化分子氧氧化单萜烯研究在其他几个性状上，亦经证明有少量地理变异，诸如皮部的某些单萜烯浓度。

Study on the relation of geographic conditions variation and deviation of climatic analogue with the adaptability of rice varieties introduced

地理变差及气候相似距与早、中稻引种适应性的研究

Geographic pattern of variation of 100-seed weight showed a bidirectional trend , e.g. decreasing gradually from southeast to northwest .

种子百粒重呈双向渐变趋势，从东南到西北呈逐渐减小。

In fire risk period , l5 provenances of Schima superba was selected to study the geographic differences and its variation patterns for fire-assistant and fire-resistant chemical component in fresh leaves .

选择木荷15个代表性种源，以研究火险期鲜叶主要抑燃性和助燃性化学组分的种源差异及地理变异模式。