Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (12): 42-48.doi: 10.11924/j.issn.1000-6850.casb15110064

Special Issue: 马铃薯

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Breeding of a New Sweetpotato Variety ‘Sushu 24’ with High Starch Content

Jia Zhaodong, Ma Peiyong, Bian Xiaofeng, Guo Xiaoding, Xie Yizhi   

  1. (Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014)
  • Received:2015-11-10 Revised:2016-04-11 Accepted:2015-12-14 Online:2016-04-27 Published:2016-04-27

Abstract: In order to improve the popularization and application of a new sweetpotato variety ‘Sushu 24’ with high starch content, the breeding experience of the sweetpotato variety with high starch content was summarized from the multipoint variety comparative test from 2012 to 2014 and disease resistance evaluation. The results showed that in Yangtze River Basin test under the national sweetpotato regional trial (2012—2013), the average fresh root yield of ‘Sushu 24’ was 33534.0 kg/hm2, the average yield of dry matter was 11130.0 kg/hm2, the starch yield was 7549.5 kg/hm2, which increased significantly by 18.27% compared with that of ‘Xushu 22’(CK). The average dry matter rate and starch rate were 33.08% and 22.41%, respectively 2.84 and 2.47 percentage point higher than that of ‘Sushu 22’ (CK). In 2014 Yangtze River Basin production trial, the average fresh storage root yield of ‘Sushu 24’ was 31204.5 kg/hm2, the average yield of dry matter was 10194.0 kg/hm2, the average starch yield was 6883.5 kg/hm2, which was 23.28% higher than that of ‘Xushu 22’. ‘Sushu 24’ passed the national new sweet potato variety identification in February 2015. ‘Sushu 24’ assembled the advantages of high yield, high starch, stable yield and fine comprehensive characters from parents, the dry matter and starch yield were high, disease-resistance and storable character were fine, it had wide prospect in the Yangtze River Basin and surrounding areas. At last, the authors put forward that breeding sweet potato varieties with high starch content should cultivate the backbone parents and create the core germplasm, make cross combinations and increase the selection pressure, thus to accelerate the breeding process.