Fig. 4

Isogloss maps obtained from hierarchical clustering using the names of rice landraces grown in 1885 in Ehime Prefecture compiled in Dainippon-beikokukai [16]. Group divisions for A 2 groups, B 3 groups, C 4 groups, and D 5 groups. Names in italics within boxes indicate the indicator variety names detected by Indicator Species Analysis, with colors corresponding to the group colors in each map