Abstract: ‘Minkui 4’is a new，pollen-free ornamental sunflower cultivar developed by cross the
‘GS08’as female parent and the high-generation inbred line‘M1R3-1’as male parent. The characteristics
of‘Minkui 4’is yellow ligulate petals，black tubular flowers，pollen-free property，no branching capability.
This vigorous，adaptable，new variety had a short growth period，was suitable for year-round cultivation.
‘Minkui 4’planted in the fall had a growth period of 84–89 days. Its plant height was 106–136 cm with
leaf number of 18–23，stem diameter of 1.7–2.0 cm，faceplate diameter of 7.1–7.5 cm，flower diameter
of 14.6–15.8 cm，petal number of 34–38，cut flower lifespan of 10–14 days and provided a cutting
output of 90 000–120 000 pieces · hm-2‘. Minkui 4’could be used for ornamental cut flower production or
garden landscape cultivation.

Key words: ornamental sunflower, pollen-free, cultivar