To explore the genotype and environment interaction on soybean flowering time, we used the phenotype in 2010. The heritability of flowering time was 77.78%, and the heritability of additive and epistasis effects were 12.79% and 15.66%, respectively. The heritability of genotype × environment interaction was 49.33%, which was constituted by epistasis × environment interaction (h2 ae = 25.81%) and additive × environment interaction (h2 aae = 23.52%). These results indicated that soybean flowering time was mainly controlled by additive × environment interaction and the epistasis × environment interaction (Table 4).Table 4Estimated heritability of the flowering time in soybeanTotal Heritability (%)h2 a (%)h2 ae (%)h2 aa (%)h2 aae (%)77.7812.7923.5215.6625.81a, additive effect; ae, additive by environment interaction effect; aa, epistasis effect; aae, epistasis by environment interaction effect; h2(%) = heritability(%)