Data from: Genome scanning for detecting adaptive genes along environmental gradients in the Japanese conifer, Cryptomeria japonica

Local adaptation is important in evolutionary processes and speciation. We used multiple tests to identify several candidate genes that may be involved in local adaptation from 1026 loci in 14 natural populations of Cryptomeria japonica, the most economically important forestry tree in Japan. We also studied the relationships between genotypes and environmental variables to obtain information on the selective pressures acting on individual populations. Outlier loci were mapped onto a linkage map, and the positions of loci associated with specific environmental variables are considered. The outlier loci were not randomly distributed on the linkage map; linkage group 11 was identified as a genomic island of divergence. Three loci in this region were also associated with environmental variables such as mean annual temperature, daily maximum temperature, maximum snow depth, and so on. Outlier loci identified with high significance levels will be essential for conservation purposes and for future work on molecular breeding.局部适应在演化进程与物种形成过程中具有关键作用。本研究通过多种检验方法，从日本柳杉（Cryptomeria japonica）——日本经济价值最高的造林树种——的14个自然种群的1026个位点中，筛选出若干可能参与局部适应的候选基因。本研究同时分析了基因型与环境变量间的关联，以解析作用于各自然种群的选择压力。我们将异常位点定位至连锁图谱，并对与特定环境变量相关联的位点的位置进行了考察。异常位点在连锁图谱上并非随机分布，其中第11连锁群被鉴定为分化基因组岛。该区域内的3个位点同时与年均温、日最高温、最大积雪深度等环境变量显著相关。经高显著性水平筛选得到的异常位点，将在物种保护及未来分子育种研究中具备重要应用价值。