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"antioxidant activity"

New Cultivar Developed

재배안정성이 향상된 중생 다수성 적갈메 ‘다홍미’
‘Dahongmi’, a Mid-Maturing, High-Yielding, Red-brown Colored Rice Cultivar with Improved Cultivation Stability
Sang-Beom Lee, Hyang-Mi Park, Kuk-Hyun Jung, Ung-Jo Hyun, Yong-Jae Won, Jeong-Heui Lee, Jung-Hee Jang, Chae-Young Lee, Tae-Jin Won, Ye-Seul Choi, Yong-Hee Jeon, Yoon-Sung Lee, Eok-Keun Ahn
Korean. J. Breed. Sci. 2023;55(4):381-388.
Published online December 1, 2023
DOI: https://doi.org/10.9787/KJBS.2023.55.4.381

‘Dahongmi’ was developed to enhance the quality of colored rice by crossing ‘Jeogjinju’, Korea’s red-brown colored rice variety, with ‘Junam’, a variety known for excellent cultivation characteristics. ‘Dahongmi’ is a mid-maturing cultivar harvested approximately 15 days later than ‘Jeogjinju’, suitable for the mid-central plains. Each ‘Dahongmi’ plant bears 14 panicles, similar to that in ‘Jeogjinju’ but with an additional 22 grains per panicle and a heavier 1000-grain weight compared to that of ‘Jeogjinju’. ‘Dahongmi’ exhibited superior low-temperature germination rate (85.1%) and a higher percentage of fertile grains at a cold-water irrigated nursery (36.2%) compared to ‘Jeogjinju’. The stem height of ‘Dahongmi’ is 89.7 cm, similar to that of ‘Jeogjinju’. However, ‘Dahongmi’ has a third node height 9 cm shorter than that of ‘Jeogjinju’, enhancing its resistance to lodging. Furthermore, it displayed resistance to leaf blast, bacterial leaf blight (K1, K2, and K3 strains), and rice stripe virus, ensuring stability during cultivation. The protein and amylose content of ‘Dahongmi’ are 5.5% and 18.9%, respectively, similar to that of ‘Jeogjinju’ (5.9%, 18.3%). The levels of antioxidant components such as total polyphenols and flavonoids are comparable to that of ‘Jeogjinju’. However, ‘Dahongmi’ does not exhibit resistance against bacterial leaf blight strain K3a and delphacidae, underscoring the importance of timely and balanced fertilization for effective early-stage management. ‘Dahongmi’ exhibits better yield, straw strength, and plant architecture compared to ‘Jeogjinju’. It has immense potential for augmenting the yield of high-antioxidant-pigmented rice varieties. In addition, it could provide valuable foundational data for the brown rice processing industry (Registration Number: 8680).

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국내 고추 품종 간 대사산물 함량과 항산화 활성 비교
Comparison of Metabolite Levels and Antioxidant Activity Among Pepper Cultivars
Tae Gyu Yi, Yeri Park, Ik-Young Choi, Nam-Il Park
Korean. J. Breed. Sci. 2019;51(4):326-340.   Published online December 1, 2019
DOI: https://doi.org/10.9787/KJBS.2019.51.4.326

Red peppers (Capsicum spp.) are one of the most widely consumed vegetables in Korea; thus, improving the beneficial properties of peppers may have important public health implications. Peppers contain various active phenolic compounds, including capsaicinoids; therefore, developing cultivars with high levels of these and other functional compounds is of major interest. We analyzed and compared the physiological activities and functional compounds on 15 cultivars of red peppers, including 5 commonly consumed cultivars that were collected from markets in Korea, and 10 important breeding cultivars that were registered with the National Agrobiodiversity Center (RDA, Korea). Comparisons of polyphenol content showed that polyphenol levels were higher in the green stages of the 10 registered peppers than in the same stage of ‘Noggwang Gochu’ peppers collected from the market. Based on ABTS (2,2'-azino-bis-3-ethylbenzo-thiazoline-6- sulfonic acid) radical scavenging activity, all stages of the 10 registered peppers had higher antioxidative activity than did the green and red stages of ‘Noggwang Gochu.’ Overall, ‘Hongsinho Gochu’ and ‘House Put Gochu’ had the highest antioxidant activity levels and the highest functional content among breeding cultivars. Among landraces, ‘Jeonbuk Wanju’ red peppers had both the highest functional ingredient levels and the highest antioxidant activity levels.

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쓰러짐에 강하고 항산화 활성이 높은 팥 ‘검구슬’
A New Small Redbean Cultivar ‘Geomguseul’ with Lodging Resistance and High-Antioxidant Activity
SeokBo Song, JeeYeon Ko, MyungChul Seo, DoYeon Kwak, KoanSik Woo, JungKyung Moon, SangIk Han, WonYoung Han, MyeongEn Choe, ChangHwan Park
Korean. J. Breed. Sci. 2017;49(4):390-395.   Published online December 1, 2017
DOI: https://doi.org/10.9787/KJBS.2017.49.4.390

A new small red bean cultivar, ‘Geomguseul’, was artificially crossed between ‘Chilbo’ and ‘SA8412-3-1-4-3-3-2-3’ in 1998, fixed excellent agronomic characters by pedigree breeding method, and selected for the further trials with the name of ‘Miryang 10’. It was prominent and showed good result, such as high grain quality, lodging resistance, and high-antioxidant activity in the regional adaptation yield trials (RYT) for three years from 2009 to 2011 and released for the public consumption as the name of ‘SA9801-24-4-3-1’ in 2011. ‘Geomguseul’ has a semi-determinate growth habit, yellow flower, green embryonic axis, black seed coat, white hilum, and small spherical seed (12.2 grams per 100 seeds). The average yield of ‘Geomguseul’ was 2.01 MT/ha in the regional yield trials (RYT) carried out for three years from 2009 to 2011 which was a little higher than that (1.98 MT/ha) of the check variety, ‘Chungju’.

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