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진용익 ( Yong Ik Jin ),장동칠 ( Dong Chil Chang ),조지홍 ( Ji Hong Cho ),조광수 ( Kwang Soo Cho ),임주성 ( Ju Sung Im ),홍수영 ( Su Young Hong ),김수정 ( Su Jeong Kim ),손황배 ( Whang Bae Sohn ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.4
BACKGROUND: Recently, weather disasters such as hail and typhoon occur frequently. These threaten the stable cultivation of potatoes. It is very important to cultivate potatoes with stable under unexpected weather disasters. This study was performed to investigate the correlation between mophological characteristics of potato stem and its resistance to hail damage in different potato cultivars. METHODS AND RESULTS: Hail fall occurred for 8 minutes on May 31, 2012 in the field of Highland Agriculture Research Center located in Jinbu-myeon Gangwon-do. Potato crop grown in the field was affected by hail due to which the stems of potato were broken. The percentage of broken stem of potato was investigated as the level of damage by hail. To determine the difference in theratio of broken stem among the potato cultivars, physical characteristics of potato stem such as diameter and hardness were measured. To evaluate recovery phase after hail damage, ground coverage and yield were measured. The percentage of broken stem of cv. Goun and cv. Saebong were 30%, 26%, respectively, whereas it was 5% in the cv. Atlantic. Damage by hail was the lowest in cv. Atlantic. Diameter of the stem was 15 mm in cv. Atlantic, 13 mm in cv. Goun and 11 mm in cv. Saebong. The hardness of potato cultivars was measured which was 74 N in cv. Atlantic. 71 N in cv. Goun and 59 N in cv. Saebong. The ground coverage in cv. Atlantic was 79%, which was the highest followed by 73% in cv. Saebong and 56% in cv. Goun. The yield of cv. Atlantic was monitored at 90 days after planting which was 40 MT/ha and that of cv. Saebong was 36 MT/ha, whereas in cv. Goun, it was 30 MT/ha which was the lowest. CONCLUSION: The ratio of broken stem in cv. Atlantic was the lowest compared to cultivars. In the physical characteristics of stem, cv. Atlantic was the highest in value of diameter and hardness. Based on these results, it wasconsidered that cv. Atlantic was resistant to hail damage compared to other cultivars.
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감자 주요 품종의 괴경 부위, 저장기간별 글리코알칼로이드(glycoalkaloid) 함량
김율호(Yul-Ho Kim),김금희(Guem Hee Kim),지혜림(Hye Rim Ji),이유영(Yu-Young Lee),박향미(Hyang-Mi Park),권오근(Oh-Keun Kwon),김수정(Su Jeong Kim),손황배(Whang-Bae Sohn),진용익(Yong-Ik Jin),홍수영(Su-Young Hong),남정환(Jeong-Hwan Nam),권 한국육종학회 2014 한국육종학회지 Vol.46 No.3
Potato glycoalkaloids (PGAs) are potentially toxic to humans at high levels, and current safety regulations have recommended that PGAs content in tubers of potato cultivars should not exceed 20 mg/100gFW. Accordingly, it is important to determine the PGAs composition and level on potato cultivars for food safety and the breeding for new cultivars with low levels of PGAs. The main aim of this study was to evaluate α-chaconine, α-solanine, and total PGAs content in the peel and cortex portions in four recent cultivars (‘Haryoung’, ‘Goun’, ‘Hongyoung’ and ‘Jayoung’), released by Highland Agriculture Research Center, together with ‘Superior’ and ‘Atlantic’. The total PGAs ranged from 16.5 to 47.7 mg/100gFW. The α-solanine/α-chaconine ratio was 1:3.2 (‘Jayoung’), 1:3.5 (‘Hongyoung’) and 1:2 (‘Superior’), whereas α-solanine was not detected in ‘Goun’, ‘Atlantic’ and ‘Hongyoung’ under the analytical condition of this experiment. 75-94% of total PGAs was existed in the peel part of all cultivars. We selected two cultivars (‘Atlantic’ and ‘Goun’) showing lower PGAs content in the cortex part. During storage at 4°C, total PGAs content fluctuated widely in early stage of storage and stabilized gradually over time in ‘Hongyoung’, ‘Superior’ and ‘Jayoung’. Thus, through the selection of cultivars and storage conditions, these results will provide consumers and breeders with fundamental information about the content of PGAs in Korea major cultivars.
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