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Open AccessArticle

Screening Cultivated Eggplant and Wild Relatives for Resistance to Bacterial Wilt (Ralstonia solanacearum)

1
World Vegetable Center, PO Box 42, Shanhua, Tainan 74199, Taiwan
2
Horticulture Department, Faculty of Agriculture, University of Kafrelsheikh, Kafr El-Sheikh 33516, Egypt
3
Department of Plant Pathology, National Chung Hsing University, Taichung 40277, Taiwan
4
Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Valencia 46022, Spain
*
Author to whom correspondence should be addressed.
Agriculture 2019, 9(7), 157; https://doi.org/10.3390/agriculture9070157
Received: 15 June 2019 / Revised: 6 July 2019 / Accepted: 9 July 2019 / Published: 15 July 2019
(This article belongs to the Special Issue Vegetable Crops Breeding)
Bacterial wilt, caused by Ralstonia solanacearum, is highly diverse and the identification of new sources of resistance for the incorporation of multiple and complementary resistance genes in the same cultivar is the best strategy for durable and stable resistance. The objective of this study was to screen seven accessions of cultivated eggplant (Solanum melongena L.) and 40 accessions from 12 wild relatives for resistance to two virulent R. solanacearum strains (Pss97 and Pss2016; phylotype I, race 1, biovar 3). The resistant or moderately resistant accessions were further evaluated with Pss97 in a second trial under high temperatures (and also with Pss2016 for S. anguivi accession VI050346). The resistant control EG203 was resistant to Pss97, but only moderately resistant to Pss2016. One accession of S. sisymbriifolium (SIS1) and two accessions of S. torvum (TOR2 and TOR3) were resistant or moderately resistant to Pss97 in both trials. Solanum anguivi VI050346, S. incanum accession MM577, and S. sisymbriifolium (SIS1 and SIS2) were resistant to Pss2016 in the first trial. However, S. anguivi VI050346 was susceptible in the second trial. These results are important for breeding resistant rootstocks and cultivars that can be used to manage this endemic disease. View Full-Text
Keywords: Solanum melongena; wild relatives; bacterial wilt strains; phylotype I; disease resistance Solanum melongena; wild relatives; bacterial wilt strains; phylotype I; disease resistance
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Namisy, A.; Chen, J.-R.; Prohens, J.; Metwally, E.; Elmahrouk, M.; Rakha, M. Screening Cultivated Eggplant and Wild Relatives for Resistance to Bacterial Wilt (Ralstonia solanacearum). Agriculture 2019, 9, 157.

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