Search for adaptive changes in genes affecting phenology of the Japanese oak

有观点认为，蒙古栎属(Quercus mongolica var.)在冰河时代的迁徙和定居期间，日本北部和南部的(皱纹)经历了一段不同的适应历史。为了检测基因的适应性变化，我们克隆了橡树光敏色素基因作为候选基因之一。我们还收集了日本北部和南部的种子，种植在札幌和爱媛的实验林中，以测量物候性状。我们发现了三个光敏色素基因，并且在北方种群中核苷酸多样性很高。在野外实验中，我们观察到北方和南方种群的早期死亡率和继发性闪光率有相当大的差异。

It has been suggested that Japanese oak (Quercus mongolica var. crispula) in the northern and the southern part of Japan had experienced a different history of adaptation during the glacial age migrations and settlements. In order to detect adaptive changes in genes we cloned phytochrome genes in the oak as one of the candidates. We also collected seeds from the northern and the southern parts of Japan and planted in the experimental forest in Sapporo and Ehime to measure phonological traits. We found three phytochrome genes, and also that nucleotide diversity was high in the northern populations. In the field experiment, we observed that there are considerable difference in early death rates and secondary flash rates in the northern and the southern populations.