Fig. 1

Frequency distributions for leaf type associated traits in ZH and GB RILs. The arrows indicate traits related values for the two parents used to construct the RIL population (cv. Zhonghuang 24 and Huaxia 3; cv. Guizao 1 and Brazil 13). a The frequency distribution for leaf type associated traits at soybean V6 growth stage, the ‘Row one’ and ‘Row two’ are corresponding to ZH and GB RILs in the summer of 2017 at Zengcheng, respectively; b The frequency distribution for leaf type associated traits at soybean R2 growth stage, the ‘Row one’ and ‘Row two’ are corresponding to ZH and GB RILs in the spring of 2017 at Zengcheng, respectively; c The frequency distribution for leaf type associated traits at soybean R4 growth stage, the ‘Row one’ is corresponding to ZH RILs in the summer of 2017 at Zengcheng, the ‘Row two’ is corresponding to GB RILs in the spring of 2016 at Zengcheng; d the frequency distribution for leaf type associated traits at soybean R6 growth stage, the ‘Row one’ and ‘Row two’ are corresponding to ZH and GB RILs in the summer of 2017 at Zengcheng, respectively; the ‘Row three’ is corresponding to GB RILs in the summer of 2017 at the Guangzhou experimental station