Sclerotinia rot, caused by Sclerotinia sclerotiorum, is a devastating disease that poses a serious threat to perilla production in Korea. Identifying effective sources of resistance offers long term prospects for improving management of this disease. Screening disease resistant genetic resources is important for development of disease-resistant, new cultivars and conduct related research. In the present study, perilla germplasm were screened in vitro against S. sclerotiorum using detached leaf method. Among 544 perilla accessions, two were highly resistant (IT226504, IT226533), five were resistant (IT226561, IT226532, IT226526, IT226441, and IT226589), five were moderately resistant (IT226525, IT226640, IT226568, IT220624, and IT178655), 16 were moderately susceptible, 31 were susceptible, and 485 were highly susceptible. The resistant accessions in this study could serve as resistance donor in the breeding of Sclerotinia rot resistance or subjected to selection procedure of varietal development for direct use by breeders, farmers, researchers, and end consumers.

Abstract
Introduction
Materials and Methods
    Plant material
    Fungal pathogen
    Inoculation methods
    Disease rating & resistance response
Results
Discussion
References

• Ho-Sun Lee(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA) Corresponding author
• Tania Afroz(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Young-Ah Jeon(International Technology Cooperation Center, Rural Development Administration)
• Jung-Sook Sung(Upland Crop Breeding, Researcher Division Department of Southern Area Crop Science, National Institute of Crop Science, RDA)
• Ju-Hee Rhee(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Awraris Derbie Aseefa(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Jaejong Noh(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Aejin Hwang(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• On-Sook Hur(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Na-Young Ro(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)
• Jae-Eun Lee(National Agrobiodiversity Center, National Institute of Agricultural Science, RDA)