A New Screening Method for the Selection of Calla Lily Zantedeschia aethiopica Cultivars Resistant to Calla Lily Soft Rot

• Published in: Weon'ye gwahag gi'sulji Vol. 31; no. 3
• Main Authors: Joung, H.Y., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Choi, M.P., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Han, K.S., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Kim, S., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Goo, D.H., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Kang, Y.I., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Choi, Y.J., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea, Park, S.K., National Institute of horticultural and Herbal Science, Suwon, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.06.2013
• Subjects: CONTROL DE ENFERMEDADES; CONTROLE DE MALADIES; DISEASE CONTROL; INOCULACION; INOCULATION; P. carotovorum subsp. carotovorum,resistance breeding
• ISSN: 1226-8763
• DOI: 10.7235/hort.2013.12205

This experiment was carried out to establish the screening methods for the selection of Zantedeschia aethiopica cultivars resistant to calla lily soft rot caused by Pectobacterium carotovorum subsp. carotovorum. A center of leaf and petiole tissues of four Z. aethiopica cultivars were wounded and inoculated with three different inoculum concentrations, 1 × 107 cfu/mL, 1 × 108 cfu/mL, and 1 × 109 cfu/mL, of EccNHRI-21 isolate. And they were evaluated at 4, 18, and 26 hours after inoculation. The lesion of maceration was developed well in the leaf tissues inoculated with 1 × 109 cfu/mL concentration. And evaluation of resistance in 18 hours after inoculation was correlated with field resistance positively. Using this method, ten Z. aethiopica commercial cultivars and four wild types were screened. ‘Crowbrough’ and ‘White Cutie’ were selected as highly resistant genotypes and ‘Mont Blanc’ and ‘Silky White’ as resistant genotypes. ‘Wedding March’ and ‘Kiwi Blush’ were evaluated as moderate resistant and the others including ‘Childsiana’ were susceptible. And all of four wild types were evaluated as more than moderate resistant. In spite of control through cultural, biological and chemical methods, the use of resistant cultivars is most efficient to overcome calla lily soft rot. This newly developed screening method was helpful for breeding new varieties resistant to calla lily soft rot.