In order to breeding new varieties of high-yield and high-quality starch-type sweetpotatoes.Using high starch content variety Nanshu 99 as the female parent and Zhezishu 1 as the male parent,a new sweetpotato variety,Sushu 30,bred by hybridization method of breeding.The characteristics,yield performance,quality traits and dis-ease resistance of Sushu 30 were analyzed in this study.The results showed that Sushu 30 obtained the favorable traits of the hybrid parents,the average starch yield of root was 8.18%higher than the Suyu 303(CK),the average starch rate was 19.52%,the dry matter content was 31.43%,and the rate of large and medium tuber was 82.6%.Detection of dry storage-root samples showed that:the soluble sugar content was 5.99%,reducing sugar content was 2.99%,and the crude protein content was 7.44%.Sushu 30 was resistant to vine cutting disease,medium re-sistant to black rot disease and stem nematode.Sushu 30 is suitable for planting in Jiangsu Province and neighboring areas.In2019,Sushu 30 passed the national crop new variety registration(No.GPD Sweetpotato(2019)320056),also obtained plant new variety rights(CNA20182699.8)in 2022.
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