Vgsc allele frequencies in African malaria vector species: field data and predictive map data grids

Predictions for the frequency of alleles of the voltage gated sodium channel gene (Vgsc) were produced by a spatio-temporal model that used allele frequency data from field populations and a large number of potential explanatory variables. Full details are given in the linked BMC Biology article.<br>File 1_Vgsc_allele_freq_dataset.csv contains the field population data that went into the model. The inclusion criteria for the subset of the data that went into the model are listed in the accompanying article.<br>File 2_data_grids_of_predicted_allele_frequencies.zip<br> is a zipped folder containing data grids (rasters)<br>for each mosquito species, country and year modelled. Each raster comprises two files; a GRD and GRI file.The rasters are at a 2.5 arcminute (approx. 5 km) resolution. Each grid cell has a value for the predicted allele frequency on a scale of 0.0 to 1.0.<br>These raster data can be visualised and processed in a range of geographical information system packages (e.g. ArcGIS and QGIS) or spatial data packages in R (http://cran.r-project.org/web/views/Spatial.html).

本研究采用野外种群等位基因频率数据与大量潜在解释变量，借助时空模型对电压门控钠通道基因（voltage gated sodium channel gene, Vgsc）的等位基因频率进行预测。相关完整细节已在关联发表的《BMC Biology》论文中详述。
文件1_Vgsc_allele_freq_dataset.csv 包含了用于构建该模型的野外种群数据，该模型所用数据子集的纳入标准已在随附论文中列明。
文件2_data_grids_of_predicted_allele_frequencies.zip 为压缩文件夹，内含所有建模涉及的蚊种、国家与年份对应的预测等位基因频率数据栅格（rasters）。每个栅格包含GRD与GRI两类文件，分辨率为2.5弧分（约5千米），每个网格单元的预测等位基因频率取值范围为0.0至1.0。
此类栅格数据可通过多款地理信息系统软件（如ArcGIS与QGIS）或R语言空间数据包（http://cran.r-project.org/web/views/Spatial.html）进行可视化与处理。