Fig. 1

Morphological characteristics of 373S line. a flowers with various number of functional stamen (from 0 to 6), b completely male sterile 373S plant, c one inflorescence showing fertility changes of 373S plant, with arrows showing normal stamen, d a fertile flower, with arrows showing normal nectaries, e a sterile flower, with arrows showing normal nectaries, f siliques of 373S under open pollination condition, and g siliques of 373S under selfing conditions