Jin-Hyeuk Kwon's research while affiliated with Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri and other places

... China is the largest onion-producing country worldwide, followed by India, the United States, Egypt, and Turkey, with South Korea ranked 12 th in 2019 [6]. Onion production in South Korea was 1,168,227 tons over a cultivated area of 14,673 ha in 2020, increasing to 1,576,756 tons over 18,461 ha in 2021 [7,8]. The largest onion-producing region in South Korea is Jeonnam Province, which recorded 579,042 tons of onion production in 2021, corresponding to 36.7% of the total onion production in South Korea [8]. ...

... However, there is no published record on the response of Allium varieties to rust in SA. International reports on the susceptibility of Allium species to rust either lack clearly defined infection type (IT) scales, variety names or diversity in isolates (Jennings et al. 1990;Wako et al. 2015;Kwon et al. 2021). ...

... Thus, it appears that siderophore-deficient mutants use trace amounts of iron contained in plant tissues or phytosiderophores, allowing the mutants to overcome iron deficiency (24,25). In these cases, siderophores do not appear to affect pathogenicity but may play an important role in survival and competition with other bacteria in iron-deficient plant environments (48)(49)(50). ...

... The variability in the biometric and production parameters found in various onion cultivars and accessions which have been the subject of research in various parts of the world is linked to differences in the genetic heritage and environmental factors [45,46]. As noted by a number of authors [47][48][49], the adaptability of cultivars and the different pedoclimatic conditions found at the test sites and in the many regions in the world where onion farming is particularly widespread have significantly affected production and quality results. ...

... Previous studies reported low level of heritability in shape and size in diameter and weight whereas, high heritability in height and shape and showed that bulb shape responds to selection but not size (Nakamura 1959;McCollum 1976;Dowker et al., 1984;Dowker, 2018). High genetic progress was reported for bulb weight (Lee et al., 2020). The shape of the bulb is determined by several genes and heritability values that range from moderate to high (Jones and Mann, 1963;McCollum, 1976). ...

... The different species of colletotrichum were reported in 12 countries including Australia, Brazil, Mexico, etc. (Darvas and Kotze 1987;Hunupolagama et al., 2015;Guarnaccia et al., 2016;Honger et al., 2016;Sharma et al., 2017;Giblin et al., 2018;Kimaru et al., 2018;Fuentes-Aragón et al., 2020;Kwon et al., 2020;Uysal and Kurt 2020;Hofer et al., 2021). ...

... Due to the saprophytic and pathogenic nature of fungal species within Cladosporium, this genus has a wide host range [14][15][16]. Cladosporium sphaerospermum has previously been reported as the causal agent of sooty mold in blueberries, while Cladosporium cladosporioides is the causal agent of the sooty spot on Citrus unshiu (mandarins) [17,18]. This study identified C. perangustum as the causal agent of flyspeck on Shine Muscat grapes. ...

... In un successivo studio, Makowski et al. (2011) hanno confermato attraverso un modello matematico che nell'intervallo di temperatura ottimale 15-30°C, le condizioni di bagnatura ottimali sono superiori a 20 ore. La malattia è caratterizzata da un periodo di incubazione molto lungo (fino a 4 mesi) e, sebbene il patogeno infetti in primavera, i sintomi sono visibili generalmente a metà agosto (Kwon andPark, 2004, Vicent et al., 2012). In Corea è stato anche descritto la fase secondaria della malattia causata da spore asessuate (conidi), appartenenti al genere Ramularia, che si originano dalle infezioni fogliari primarie ascosporiche prima della loro caduta e che sarebbero in grado, a loro volta, di causare infezione. ...