Genetic Variation in Soybean at the Maturity Locus E4 Is Involved in Adaptation to Long Days at High Latitudes oleh Kyuya Harada, Jun Abe, Ryoji Takahashi, Yuichi Katayose, Hiroyuki Kanamori, Xiaohui Yuan, Fanjiang Kong, Hiroko Nakashima, Toyoaki Anai, Baohui Liu, Meilan Xu, Hisakazu Matsumura, Yasutaka Tsubokura