A new source of resistance to bacterial wilt of eggplants obtained from a cross: Solanum aethiopicum L × Solanum melongena L

Ano, Georges; Hébert, Y.; Prior, Philippe; Messiaen, C. M.

doi:10.1051/agro:19910703

Cited by 39 publications

(22 citation statements)

References 6 publications

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“…It recombines BW resistance factors from MM127, a Turkish S. melongena line, and MM134, a S. aethiopicum Aculeatum Group accession, (Ano et al 1990(Ano et al , 1991. The susceptible parent MM738 is one of the parents of the F 2 mapping population that was used to establish the reference map of eggplant (Doganlar et al 2002;Wu et al 2009), and is a European commercialtype line, almost spineless and hairless, with globose dark purple fruits.…”

Section: Plant Materialsmentioning

confidence: 99%

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

et al. 2012

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Resistance of eggplant against Ralstonia solanacearum phylotype I strains was assessed in a F 6 population of recombinant inbred lines (RILs) derived from a intra-specific cross between S. melongena MM738 (susceptible) and AG91-25 (resistant). Resistance traits were determined as disease score, percentage of wilted plants, and stem-based bacterial colonization index, as assessed in greenhouse experiments conducted in Réunion Island, France. The AG91-25 resistance was highly efficient toward strains CMR134, PSS366 and GMI1000, but only partial toward the highly virulent strain PSS4. The partial resistance found against PSS4 was overcome under high inoculation pressure, with heritability estimates from 0.28 to 0.53, depending on the traits and season. A genetic map was built with 119 AFLP, SSR and SRAP markers positioned on 18 linkage groups (LG), for a total length of 884 cM, and used for quantitative trait loci (QTL) analysis.

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Section: Plant Materialsmentioning

confidence: 99%

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

et al. 2012

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“…These R genes could then provide these crops with novel resistance determinants not previously encountered by these pathogens. Breeders have performed such intra‐genus R ‐gene shuttling within Solanaceae successfully in the past (Ano et al ., ; Daunay, ).…”

Section: Introductionmentioning

confidence: 99%

Eggplant and related species are promising genetic resources to dissect the plant immune response to Pseudomonas syringae and Xanthomonas euvesicatoria and to identify new resistance determinants

Clarke

Hayes

Runde

et al. 2014

Molecular Plant Pathology

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Summary The apparent lack of durability of many resistance (R) genes highlights the need for the constant identification of new genetic sources of resistance for the breeding of new disease‐resistant crop cultivars. To this end, we screened a collection of accessions of eggplant and close relatives for resistance against Pseudomonas syringae pv. tomato (Pto) and Xanthomonas euvesicatoria (Xeu), foliar plant pathogens of many solanaceous crops. Both pathogens caused substantial disease on most genotypes of eggplant and its relatives. Promisingly, however, some of the genotypes were fully or partially resistant to either of the pathogens, suggesting the presence of effective resistance determinants in these genotypes. Segregation of resistance to the growth of Xeu following infiltration in F2 progeny from a cross of a resistant and susceptible genotype suggests that resistance to Xeu is inherited as a multigenic trait. With regard to Pto, a mutant strain lacking all 28 functional type III secreted effectors, and a Pseudomonas fluorescens strain expressing a P. syringae type III secretion system (T3SS), both elicit a strong cell death response on most eggplant lines. Several genotypes thus appear to harbour a mechanism for the direct recognition of a component of the T3SS. Therefore, eggplant and its close relatives are promising resources to unravel novel aspects of plant immunity and to identify new candidate R genes that could be employed in other Solanaceae in which Xeu and Pto cause agriculturally relevant diseases.

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“…However, significant interactions of cultivar-location highlighted the importance of both site environmental conditions and pathogen population variability for the three species (3,32,39,(50)(51)(52)57,74). Cases of resistance breakdown under intensive culture have also been observed (2,3). Hence, breeders face the challenging problem of variable efficiency of resistance expression, which is aggravated by an increasingly worldwide trade of TEP resistant cultivars.…”

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“…For decades and in several countries, breeders of solanaceous crops have identified and used intra-or interspecific sources of resistance for creating bacterial wilt resistant cultivars of tomato, eggplant, and pepper (TEP) (2,3,14,27,31,45,50,51,62,67,69,74,75). However, significant interactions of cultivar-location highlighted the importance of both site environmental conditions and pathogen population variability for the three species (3,32,39,(50)(51)(52)57,74).…”

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Bacterial Wilt Resistance in Tomato, Pepper, and Eggplant: Genetic Resources Respond to Diverse Strains in the Ralstonia solanacearum Species Complex

Lebeau¹,

Daunay²,

Frary³

et al. 2011

Phytopathology®

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Bacterial wilt, caused by strains belonging to the Ralstonia solanacearum species complex, inflicts severe economic losses in many crops worldwide. Host resistance remains the most effective control strategy against this disease. However, wilt resistance is often overcome due to the considerable variation among pathogen strains. To help breeders circumvent this problem, we assembled a worldwide collection of 30 accessions of tomato, eggplant and pepper (Core-TEP), most of which are commonly used as sources of resistance to R. solanacearum or for mapping quantitative trait loci. The Core-TEP lines were challenged with a core collection of 12 pathogen strains (Core-Rs2) representing the phylogenetic diversity of R. solanacearum. We observed six interaction phenotypes, from highly susceptible to highly resistant. Intermediate phenotypes resulted from the plants' ability to tolerate latent infections (i.e., bacterial colonization of vascular elements with limited or no wilting). The Core-Rs2 strains partitioned into three pathotypes on pepper accessions, five on tomato, and six on eggplant. A “pathoprofile” concept was developed to characterize the strain clusters, which displayed six virulence patterns on the whole set of Core-TEP host accessions. Neither pathotypes nor pathoprofiles were phylotype specific. Pathoprofiles with high aggressiveness were mainly found in strains from phylotypes I, IIB, and III. One pathoprofile included a strain that overcame almost all resistance sources.

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A new source of resistance to bacterial wilt of eggplants obtained from a cross: Solanum aethiopicum L × Solanum melongena L

Cited by 39 publications

References 6 publications

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

Genetic mapping of a major dominant gene for resistance to Ralstonia solanacearum in eggplant

Eggplant and related species are promising genetic resources to dissect the plant immune response to Pseudomonas syringae and Xanthomonas euvesicatoria and to identify new resistance determinants

Bacterial Wilt Resistance in Tomato, Pepper, and Eggplant: Genetic Resources Respond to Diverse Strains in the Ralstonia solanacearum Species Complex

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