Identification of additional QTLs for flowering time by removing the effect of the maturity gene E1 in soybean oleh Si-jia LU, Ying LI, Jia-lin WANG, Hai-yang NAN, Dong CAO, Xiao-ming LI, Dan-ning SHI, Chao FANG, Xin-yi SHI, Xiao-hui YUAN, Jun Abe, Bao-hui LIU, Fan-jiang KONG