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2024 Vol.37, Issue 5 Preview Page

Research Article

Optimizing Gamma-ray Dosages for Enhanced Growth and Quality of Yacon Mutant Progeny

야콘 돌연변이체 후대의 생육과 품질 향상을 위한 최적 감마선 선량 구명

Su Jeong Kim1†
,
Hwang Bae Sohn2
,
Jung Hwan Nam3†
,
Ye Jin Lee3
,
Do Yeon Kim4
,
Su Hyoung Park4
,
Jong Nam Lee4
,
Dong Chil Chang4
,
Yul Ho Kim5
김 수정1†
,
손 황배2
,
남 정환3†
,
이 예진3
,
김 도연4
,
박 수형4
,
이 종남4
,
장 동칠4
,
김 율호5
1Senior Researcher, Central Area Crop Breeding Division, National Institute of Crop Science, Rural Development Administration, Suwon 16429, Korea
2Researcher, Technology Cooperation Bureau, Rural Development Administration, Jeonju 54875, Korea
3Researcher, Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration, Pyeongchang 25342, Korea
4SeniorResearcher, Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration, Pyeongchang 25342, Korea
5Senior Researcher, Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration, Suwon 16429, Korea
1농촌진흥청 국립식량과학원 중부작물과, 농업연구관
2농촌진흥청 기술협력국 수출지원과, 농업연구사
3농촌진흥청 국립식량과학원 고령지농업연구소, 농업연구사
4농촌진흥청 국립식량과학원 고령지농업연구소, 농업연구관
5농촌진흥청 국립식량과학원 재배환경과, 농업연구관
*Corresponding Author
†These authors contributed equally to this work.
1 October 2024. pp. 527-236
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Abstract

Yacon (Samallanthus sonchifolius (Poepp. & Endl.) H. Robinson), a member of the Andean root crops (including potato and sweet potato) renowned for its sweet taste and crisp texture, has gained popularity owing to its high fructooligosaccharides content. Although gamma-ray mutagenesis has been utilized to develop breeding resources with novel characteristics, research on the radiation sensitivity of yacon remains limited. Therefore, this study aims to determine the optimal gamma-ray dosage for mutation breeding in yacón. Crown and green buds of yacon were exposed to gamma rays (20~80 Gy) and subsequently planted in a field. The median lethal doses for crown and green buds were 22.4 and 36.6 Gy, respectively. The aboveground characteristics of early generation (M1) included reduced plant height and leaf stem weight, resulting in a plant canopy highly adaptable to dense planting. Additionally, cracking of underground parts was notably reduced, thus improving quality characteristics. In the mutant descendant generation (M8), plant height remained similar to that of the original species or showed a decreasing trend; however, stem and leaf numbers along with leaf stem weight increased compared with the original species. The total tuber yield was 4,300 and 4,251 ㎏/10a under 20 and 40 Gy treatments, representing an increase of 12.7% and 11.4%, respectively, compared with the original species (3,817 ㎏/10a). After considering growth and quality factors, gamma-ray doses within the 20~40 Gy range were found optimal for selecting useful mutant lines in yacón. These mutants could contribute in developing a new yacón variety with high fructooligosaccharides content and long-term storage capabilities.

Keywords
Fructooligosaccharides
Gamma-ray
Median letal dose
Mutant
Tuberous root
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Information
  • Publisher :The Plant Resources Society of Korea
  • Publisher(Ko) :한국자원식물학회
  • Journal Title :Korean Journal of Plant Resources
  • Journal Title(Ko) :한국자원식물학회지
  • Volume : 37
  • No :5
  • Pages :527-236
  • Received Date : 2024-03-19
  • Revised Date : 2024-07-14
  • Accepted Date : 2024-07-18
  • DOI :https://doi.org/10.7732/kjpr.2024.37.5.527
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