Flowering time is one of the most important traits associated with seed yield and adaptation of soybean. Soybean flowering time is regulated by both genetic and environmental factors [6, 7]. At least 11 major loci control flowering time and maturity in soybean, including E1– E10 [8–17] and J . Among them, six genes (E1, E2, E3, E4 E9 and J) have been cloned or identified. E1 was reported to be a legume-specific transcription factor which could delay soybean flowering time in long-day conditions . E2 was identified to be an ortholog of the Arabidopsis GIGANTEA gene . E3 and E4 were confirmed to be homologs of PHYA . E9 was recently identified as GmFT2a, an ortholog of Arabidopsis FT . J was the dominant functional allele of GmELF3 . GmFT5a was also identified as a key gene to regulate soybean flowering time . Other orthologs of Arabidopsis flowering genes such as GmCOLs , GmSOC1 , and GmCRY , and many other genes controlling flowering time have also been identified .