This study analyzed the quality characteristics of 12 indigenous soybean lines cultivated in Goesan, Chungbuk province, focusing on their proximate composition, antioxidant activities, and isoflavone content. Proximate composition varied significantly among lines: moisture (4.92－12.87%), crude ash (3.79－5.98%), crude protein (15.24－39.60%), crude lipid (1.08－30.40%), and carbohydrate (34.31－65.43%). Jinunikong exhibited the highest crude protein content (39.60%), while Hayanultarikong had the lowest (15.24%). Ajukkaribamkong (brown) contained the highest crude lipid content (30.40%). Napdegikong demonstrated the highest antioxidant activities, with peak values in total polyphenol (843.79 mg%), total flavonoid (508.98 mg%), 2,2'-azino-bis (3-ethylbenzthiazoline-6- sulfonic acid) (ABTS) radical scavenging (97.20%), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging (85.92%). In contrast, Hayanultarikong and Ajukkaribamkong (brown) showed the lowest antioxidant activities, with no significant difference between them. Malonyl daidzin and malonyl genistin were the predominant isoflavones. Namdojangkong had the highest levels of these compounds (92.80 and 179.85 mg/100g, respectively). However, no isoflavones were detected in Hayanultarikong, Ajukkaribamkong (brown), and Eollukgangnangkong. Correlation analysis revealed positive relationships among crude protein, antioxidant activities, polyphenols, flavonoids, and isoflavones, while negative correlations were observed with carbohydrate content. These findings provide fundamental data on the physicochemical and functional properties of Chungbuk indigenous soybeans, confirming their potential as valuable genetic resources for functional food development and cultivar improvement.

Abstract
서 론
재료 및 방법
    1. 실험 재료 및 전처리
    2. 일반성분 측정
    3. 항산화 활성 측정
    4. 총 폴리페놀 함량 측정
    5. 총 플라보노이드 측정
    6. 이소플라본
    7. 통계처리
결과 및 고찰
    1. 일반성분
    2. 총폴리페놀, 총플라보노이드함량및라디칼소거활성
    3. 이소플라본 함량
요 약
References

• 노솔지(충청북도농업기술원 지방농업연구사) | Sol-Ji Noh (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 박재은(충청북도농업기술원 지방농업연구사) | Jae Eun Park (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 박혜진(충청북도농업기술원 지방농업연구사) | Hye Jin Park (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 한우리(충청북도농업기술원 지방농업연구사) | Woo-Ri Han (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 임주현(충청북도농업기술원 지방농업연구사) | Ju Hyun Im (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 김성겸(충청북도농업기술원 지방농업연구사) | Seong Kyeom Kim (Associate Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 박재호(충청북도농업기술원 지방농업연구관) | Jae-Ho Park (Senior Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea)
• 엄현주(충청북도농업기술원 지방농업연구관) | Hyun-Ju Eom (Senior Researcher, Chungcheongbukdo Agricultural Research and Extension Services, Cheongju 28130, Korea) Corresponding author
• 황인국(농촌진흥청 국립식량과학원 식품자원개발부 농업연구사) | In-Guk Hwang (Associate Researcher, Dept. of Food Sciences, National Institute of Crop and Food Science, Rural Development Administration, Wanju 55365, Korea)