‘Dawonmi’ was developed in 2023 as a high-yielding, mealy-textured sweetpotato cultivar for starch processing. It was derived from a cross between ‘Beniharuka’ (IT309504) and ‘Jinyulmi’ (IT309420). The storage roots had pink skin, white flesh, and a cylindrical shape. ‘Dawonmi’ is resistant to Fusarium wilt and moderately resistant to root-knot nematode. When steamed, ‘Dawonmi’ exhibits a drier and more mealy texture than the check cultivar ‘Jinyulmi.’ The free sugar content of steamed roots was 22.4 g/100 g (dry weight basis), which was slightly lower than that of ‘Jinyulmi.’ In starch pasting properties, ‘Dawonmi’ showed a higher peak viscosity (284.3 RVU), lower breakdown viscosity (114.4 RVU), and lower consistency (53.9 RVU) than ‘Jinyulmi,’ along with a higher gelatinization onset temperature (79.7℃), indicating greater thermal and structural stability of the starch. Under normal-season cultivation, the average marketable root weight of ‘Dawonmi’ was 237.1 g, with 3.2 marketable roots per plant. The marketable root yield was 37.1 MT/ha, which was 54.6% higher than that of ‘Jinyulmi,’ and the starch yield reached 13.7 MT/ha, representing a 125% increase. These results suggest that ‘Dawonmi’ possesses high yield potential and favorable starch characteristics, making it suitable for starch-processing applications.
Moon et al. (Mon,) studied this question.