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2019 Vol.64, Issue 4 Preview Page

Original Research Article

Crop Characteristics of Sweetpotato (Ipomoea batatas L.) Germplasms for Optimizing the Selection of Resources

우수자원 선발을 위한 고구마 유전자원의 주요 특성 평가

Won Park1
,
Hyeong-Un Lee2
,
San Goh2
,
Im Been Lee2
,
Sang-Sik Nam3
,
Mi Nam Chung3
,
Gyeong-Dan Yu2
,
Eom-Ji Hwang2
,
Seungyong Lee2
,
Jin Cheon Park2
,
Chandra Paul Narayan1
,
Seon-Kyeong Han3*
박 원1
,
이 형운2
,
고 산2
,
이 임빈2
,
남 상식3
,
정 미남3
,
유 경단2
,
황 엄지2
,
이 승용2
,
박 진천2
,
나라얀 찬드라폴1
,
한 선경3*
1Post-doctor, Bioenergy Crop Research Institute, National Institute of Crop Science
2RDA Researcher, Bioenergy Crop Research Institute, National Institute of Crop Science
3RDA Senior Researcher, Bioenergy Crop Research Institute, National Institute of Crop Science
1국립식량과학원 바이오에너지작물연구소 박사후연구원
2국립식량과학원 바이오에너지작물연구소 농업연구사
3국립식량과학원 바이오에너지작물연구소 농업연구관
* Corresponding Author
31 December 2019. pp. 441-451
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Abstract

This study was conducted to investigate the crop characteristics of 181 sweetpotato germplasms collected from Korea and overseas. The longest shoot vine length was observed in IT232211 (354.8 cm) and the shortest shoot vine length was observed in IT232185 (32 cm). The maximum numbers of shoot branches and nodes were produced by IT232091 (23.0) and IT232174 (67.8), respectively. Differences in Rapid Visco Analyser profiles were observed for pasting parameters such peak, trough, final, breakdown, and setback viscosities; and pasting temperature. The peak and breakdown viscosities were highest in IT232050 and IT232010, at 338.3 and 207.2 Rapid Visco Unit (RVU), respectively. The trough viscosity was lowest in IT232019 at 103.8 RVU. IT232101 had the highest final viscosity (284.6 RVU), and IT232192 had the highest setback viscosity (81.7 RVU). IT232197 had the highest pasting temperature at 86.8°C, and that of IT232134 was lowest at 72.7°C. To evaluate functional substance content, we analyzed 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and total polyphenol content. The highest frequency proportion of starch was in the 10%-15% range (50.8% of the plants), followed by the 5%-10% range (38.1% of the germplasms). Sugar content ranged from 13.5 to 33.3% (23.2% on average); the highest frequency proportion of sugar was in the 20%-25% range (56.9% of the germplasms), followed by the 25%-30% range (25.4% of the germplasms). The highest frequency proportion of water was in the 70%-80% range (52.5% of the germplasms), followed by the 60%-70% range (44.2% of the germplasms). Our results provide basic data for the selection of useful resources and for the development of new sweetpotato varieties.

Keywords
crop characteristics
germplasm
pasting parameters
starch
sugar
sweetpotato
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 64
  • No :4
  • Pages :441-451
  • Received Date : 2019-10-24
  • Revised Date : 2019-11-12
  • Accepted Date : 2019-11-16
  • DOI :https://doi.org/10.7740/kjcs.2019.64.4.441
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