Development of an Effective Method to Evaluate Resistance of Onion (<i>Allium cepa</i> L.) Cultivars to Fusarium Basal Rot

Kim, Sieun; Shin, Jong-Hwan; Lee, Ha-Kyoung; Kang, Soo-hyun; Han, Ji-won; Lee, Seong-Chan; Han, You-Kyoung

doi:2024.30.3.288

Res. Plant Dis > Volume 30(3); 2024 > Article

Note

Research in Plant Disease 2024;30(3):288-293.
DOI: https://doi.org/10.5423/RPD.2024.30.3.288 Published online September 30, 2024.

양파 유묘기 단계 시들음병(Fusarium Basal Rot) 저항성 검정법 개발

김시은¹

¹농촌진흥청국립원예특작과학원원예특작환경과
²농촌진흥청국립원예특작과학원온난화대응농업연구소
³농촌진흥청국립원예특작과학원파속채소연구센터

Development of an Effective Method to Evaluate Resistance of Onion (Allium cepa L.) Cultivars to Fusarium Basal Rot

Sieun Kim¹

, Jong-Hwan Shin²

, Ha-Kyoung Lee¹

, Soo-hyun Kang³, Ji-won Han³, Seong-Chan Lee¹

, You-Kyoung Han¹

¹Horticultural and Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea
²Research Institute of Climate Change and Agriculture, National Institute of Horticultural & Herbal Science, Rural Development Administration, Jeju 63240, Korea
³Allium Vegetables Research Institute, National Institute of Horticultural & HerbalScience, Rural Development Administration, Muan 58545, Korea

Correspondence: You-Kyoung Han, Tel: +82-63-238-6312, Fax: +82-63-238-6305,
Email: kala74@korea.kr

Received: June 27, 2024 Revised: July 17, 2024 Accepted: July 18, 2024

Abstract

Fusarium basal rot (FBR), caused by the ascomycete fungus Fusarium oxysporum, is an economically important disease of onion worldwide. The most economical and effective way to manage FBR would be the use of FBR resistant onion cultivars. This study was carried out to develop a rapid screening method for resistant onion cultivars in seedling stage. We used the F. oxysporum 19-385 isolate, which causes damping-off in onion seedlings and basal rot in onion bulbs. We optimized broth incubation and medium composition for the production of inoculum, and determined conidial concentration for the preparation of F. oxysporum infected soil. Ten commercial cultivars of onion were evaluated the seedling survival rates and heights by infected soil inoculation methods. As a result, ‘K-force’ was the most resistant cultivar with 97.4% of relative seedling survival rate against the pathogen, whereas ‘Sunpower’ was the most susceptible cultivar with 20.0% of relative seedling survival rate.

Key Words: Damping off, Fusarium basal rot, Fusarium oxysporum, Onion, Seedling testing

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ORCID iDs

Sieun Kim
https://orcid.org/0009-0005-8229-2223

Jong-Hwan Shin
https://orcid.org/0000-0002-6043-2775

Ha-Kyoung Lee
https://orcid.org/0000-0002-9734-8702

Seong-Chan Lee
https://orcid.org/0009-0001-1479-3959

You-Kyoung Han
https://orcid.org/0000-0003-3035-7775

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