• Title/Summary/Keyword: RDA 2020

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A new breed of silkworm variety, Juhwangjam, for light pink cocoon

  • Kim, Seong-Wan;Park, Jong-Woo;Kim, Su Bae;Yu, Jeong Hee;Hong, Jeong Won;Kang, Sang Kug;Kim, Nam Suk;Kim, Kee Young
    • International Journal of Industrial Entomology and Biomaterials
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    • v.40 no.2
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    • pp.51-55
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    • 2020

  • A new silkworm variety, Juhwangjam, was bred for the producing of light pink colored cocoon. The Juhwangjam variety was selected and succeeded from the F1 of 2303 × BP Heehong in 2016 autumn. Hatchability (96%) and pupation percentage (97.6%) of Juhwangjam was matched to the authorization criteria for commercial silkworm variety. Laval period and other economical characters of Juhwangjam were similar to the authorized silkworm variety, Goldensilk. Cocoon yield of Juhwangjam in spring and autumn season was 20.0 and 14.3 kg, respectively. Therefore, a new silkworm variety, Juhwangjam for light pink cocoon, might be adaptable to culture in spring season rather than autumn season.

  • https://doi.org/10.7852/ijie.2020.40.2.51 인용 PDF KSCI

Comparison of Antioxidant and yield Properties of of Adzuki Bean (Vigna angularis L.) Cultivars Under Different Air Temperatures and Sunshine Hours

  • Jisun Jang;Seon-Min Oh;Kwonseo Park;Youngsik Kang;Jeom-Sig Lee;Suk-Bo Song;Tugsang Yun;Jae Yoon Kim
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2022.10a
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    • pp.309-309
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    • 2022

  • This study investigated the antioxidant and yield properties of eight adzuki bean (Vigna angularis) cultivars under different mean temperature and sunshine hours in 2020 and 2021. The mean temperature in 2020 compared to 2021, which was normal, were lower during the pod extension and grain filling period. In addition, due to frequent rainfall during the vegetative perio d in 2020, there were fewer hours of sunshine compared to 2021. The Adzuki Bean yield in 2020 was about 13% lower than that in 2021 due to the decreased number of pods per plant and 100 seeds weight. The stability of yields was higher in 'Hongda' and 'Hongjin' than in 'Arari', which is the most cultivated in Korea. Also, the yields of these varieties were all higher than those of 'Arari' varieties for two years. Compared to 2021, in 2020, when weather conditions were not favorable, both antioxidant components and activity were higher. The cultivar 'Hongda' was a higher antioxidant component and activity than others for two years. The results suggested that the antioxidant component and activity were good in 2020 with about 13% decrease in yield compared to a normal year in 2021 due to mean temperature and sunshine hours.

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Flavonoids analysis in leaves and fruits of Korean mulberry cultivar, Baekokwang having white fruits

  • Lee, Sora;Kim, Soo Hyun;Koo, Bonwoo;Kim, Hyun-Bok;Jo, You-Young;Kweon, HaeYong;Ju, Wan-Taek
    • International Journal of Industrial Entomology and Biomaterials
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    • v.41 no.2
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    • pp.45-50
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    • 2020

  • Morus alba has white and/or purple fruits with a very sweet taste and low acidity. Most Korean mulberry trees have purple fruits. However, Baekokwang is a unique mulberry genetic resource in Korea with white fruits. In this study, flavonoids contents of Baekokwang mulberry leaf and fruit were analyzed using ultrahigh performance liquid chromatography coupled with diode array detection and quadrupole time-of-flight mass spectrometry (UPLC-DAD-QTOF/MS) technique. UPLC-DAD-QTOF/MS chromatogram showed that 15 flavonoids and 9 flavonoids were isolated and identified from the mulberry leaf and fruit. Total flavonoids contents of Baekokwang leaves and fruits were 812.7 mg and 35.0 mg, respectively. Baekokwang leaves had 4 major flavonoids including quercetin 3-O-(6"-O-malonyl) glucoside, 235.3 ppm, kaempferol 3-O-(6"-O-malonyl) glucoside, 132.3 ppm, kaempferol 3-O-rutinoside (nicotiflorin), 108.1 ppm, and quercetin 3-O-rutinoside (rutin), 103.8 ppm. Baekokwang fruits had 3 major flavonoids including quercetin 3-O-(6"-O-malonyl) glucoside, 13.0 ppm, quercetin 3-O-rutinoside (rutin), 7.8 ppm, and kaempferol 3-O-rutinoside (nicotiflorin), 5.7 ppm. From the above results, mulberry leaves have rich flavonoids compared to its fruits.

  • https://doi.org/10.7852/ijie.2020.41.2.45 인용 PDF KSCI