Differences in the sucrose synthase gene SUS1 expression pattern between Solanum lycopersicum and wild tomato species

2019 ◽  
Vol 31 (4) ◽  
pp. 455-462
Author(s):  
Maria A. Slugina ◽  
Anna V. Shchennikova ◽  
Elena Z. Kochieva
Keyword(s):  
Solanum Lycopersicum ◽  
Expression Pattern ◽  
Sucrose Synthase ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species

scholarly journals Tolerance Even to Lethal Strain of Potato Spindle Tuber Viroid Found in Wild Tomato Species Can Be Introduced by Crossing

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 575
Author(s):  
Takashi Naoi ◽  
Tatsuji Hataya
Keyword(s):  
Solanum Lycopersicum ◽  
Wild Species ◽  
Systemic Infection ◽  
Potato Spindle Tuber Viroid ◽  
Natural Resistance ◽  
F1 Hybrids ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Tomato Breeding

To date, natural resistance or tolerance, which can be introduced into crops by crossing, to potato spindle tuber viroid (PSTVd) has not been reported. Additionally, responses to PSTVd infection in many wild tomato species, including some species that can be crossed with PSTVd-susceptible cultivated tomatoes (Solanum lycopersicum var. lycoperaicum), have not been ascertained. The aim of this study was to evaluate responses to PSTVd infection including resistance and tolerance. Accordingly, we inoculated several cultivated and wild tomato species with intermediate and lethal strains of PSTVd. None of the host plants exhibited sufficient resistance to PSTVd to render systemic infection impossible; however, these plants displayed other responses, including tolerance. Further analysis of PSTVd accumulation revealed low accumulation of PSTVd in two wild species, exhibiting high tolerance, even to the lethal strain. Additionally, F1 hybrids generated by crossing a PSTVd-sensitive wild tomato (Solanum lycopersicum var. cerasiforme) with these wild relatives also exhibited tolerance to the lethal PSTVd strain, which is accompanied by low PSTVd accumulation during early infection. These results indicate that the tolerance toward PSTVd in wild species is a dominant trait and can be utilized for tomato breeding by crossing.

A new genetic linkage map of tomato based on a Solanum lycopersicum × S. pimpinellifolium RIL population displaying locations of candidate pathogen response genes

Genome ◽  
2009 ◽  
Vol 52 (11) ◽  
pp. 935-956 ◽  
Author(s):  
Hamid Ashrafi ◽  
Matthew Kinkade ◽  
Majid R. Foolad
Keyword(s):  
Genetic Variation ◽  
Disease Resistance ◽  
Linkage Map ◽  
Solanum Lycopersicum ◽  
Crop Improvement ◽  
Genetic Maps ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Ril Population

The narrow genetic base of the cultivated tomato, Solanum lycopersicum L., necessitates introgression of new variation from related species. Wild tomato species represent a rich source of useful genes and traits. Exploitation of genetic variation within wild species can be facilitated by the use of molecular markers and genetic maps. Recently we identified an accession (LA2093) within the red-fruited wild tomato species Solanum pimpinellifolium L. with exceptionally desirable characteristics, including disease resistance, abiotic stress tolerance, and high fruit lycopene content. To facilitate genetic characterization of such traits and their exploitation in tomato crop improvement, we developed a new recombinant inbred line (RIL) population from a cross between LA2093 and an advanced tomato breeding line (NCEBR-1). Furthermore, we constructed a medium-density molecular linkage map of this population using 294 polymorphic markers, including standard RFLPs, EST sequences (used as RFLP probes), CAPS, and SSRs. The map spanned 1091 cM of the tomato genome with an average marker spacing of 3.7 cM. A majority of the EST sequences, which were mainly chosen based on the putative role of their unigenes in disease resistance, defense-related response, or fruit quality, were mapped onto the tomato chromosomes for the first time. Co-localizations of relevant EST sequences with known disease resistance genes in tomato were also examined. This map will facilitate identification, genetic exploitation, and positional cloning of important genes or quantitative trait loci in LA2093. It also will allow the elucidation of the molecular mechanism(s) underlying important traits segregating in the RIL population. The map may further facilitate characterization and exploitation of genetic variation in other S. pimpinellifolium accessions as well as in modern cultivars of tomato.

Effect of newly developed interspecific hybrid rootstocks on mineral nutrient composition and fruit quality in tomato (Solanum lycopersicum L.)

2021 ◽  
Author(s):  
A. Kabas ◽  
I. Celik
Keyword(s):  
Solanum Lycopersicum ◽  
Fruit Quality ◽  
Interspecific Hybrids ◽  
Nutrient Composition ◽  
Mineral Nutrient ◽  
Tomato Production ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Lycopene Content

AbstractTomato (Solanum lycopersicum L.) is one of the important vegetables in the world due to large production area and consumer interest. Biotic and abiotic stresses have negative effect on tomato production. Utilisation of rootstocks conferring resistance to biotic stresses can be considered as the most effective and environment friendly solution in tomato production to overcome this problem. Although wild tomato species is a good rootstock candidate due to its resistance to multiple plant diseases, effects of wild tomato species as rootstock on mineral nutrient composition and fruit quality are not clear. In the present study, effects of interspecific hybrids derived from two wild tomato species (Solanum habrochaites and Solanum penellii) as rootstock on tomato fruit mineral nutrient composition (phosphor (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), manganese (Mn), and copper (Cu)) and fruit quality traits (soluble solids content (SSC), pH, percent titratable acidity (TA), and lycopene content) were evaluated. In the study, Amaron, Armstrong, and Arazi commercial rootstocks were used as control and AK0004 F1 (candidate tomato hybrid) was used as a source of scion. As result, only lycopene content was affected by different rootstocks. S. penellii was found to be with more potential for lycopene content. For mineral nutrient composition, all hybrids and controls had similar contents of potassium, phosphor, calcium, and magnesium. Manganese and copper contents decreased in all plants. S. habrochaites had more potential regarding nitrogen, iron, and zinc contens than S. penellii. This is the first study to evaluate two interspecific hybrids derived from S. habrochaites and S. penellii, and the results might be useful to understand effects of rootstocks derived from wild tomato species on mineral nutrient content and fruit quality.

scholarly journals Bactericera cockerelli resistance in the wild tomato Solanum habrochaites is polygenic and influenced by the presence of Candidatus Liberibacter solanacearum

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Carlos A. Avila ◽  
Thiago G. Marconi ◽  
Zenaida Viloria ◽  
Julianna Kurpis ◽  
Sonia Y. Del Rio
Keyword(s):  
Recombinant Inbred Lines ◽  
Chromosome 8 ◽  
Bactericera Cockerelli ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Cultivar Development ◽  
In The Wild ◽  
Candidatus Liberibacter ◽  
Complex Inheritance

Abstract The tomato-potato psyllid (TPP), Bactericera cockerelli, is a vector for the phloem-limited bacterium Candidatus Liberibacter solanacearum (Lso), the causative agent of economically important diseases including tomato vein-greening and potato zebra chip. Here, we screened 11 wild tomato relatives for TPP resistance as potential resources for tomato (Solanum lycopersicum) cultivar development. Six accessions with strong TPP resistance (survival <10%) were identified within S. habrochaites, S. pennelli, S. huaylasense, S. chmielewskii, S. corneliomulleri, and S. galapagense. Two S. pennelli and S. corneliomulleri accessions also showed resistance to Lso. We evaluated recombinant inbred lines (RILs) carrying resistance from S. habrochaites accession LA1777 in the S. lycopersicum background and identified major quantitative trait loci (QTLs) responsible for adult TPP mortality and fecundity in several RILs carrying insertions in different chromosomes, indicating the polygenic nature of these traits. Analysis of a major resistance QTL in RIL LA3952 on chromosome 8 revealed that the presence of Lso is required to increase adult TPP mortality. By contrast, the reduced TPP oviposition trait in LA3952 is independent of Lso. Therefore, resistance traits are available in wild-tomato species, although their complex inheritance and modes of action require further characterisation to optimise their utilisation for tomato improvement.

scholarly journals Germplasm Evaluation of Tomato for Resistance to the Emerging Wilt Pathogen Fusarium Equiseti

2018 ◽  
Vol 5 (4) ◽  
pp. 174
Author(s):  
Asma Akbar ◽  
Shaukat Hussain ◽  
Gul Shad Ali
Keyword(s):  
Genetic Difference ◽  
Fusarium Species ◽  
The Other ◽  
Resistant Variety ◽  
Fusarium Equiseti ◽  
Tomato Variety ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Genetic Pool

Fusarium wilt caused by different Fusarium species is a devastating disease causes heavy loss to tomato plantation worldwide. In this study 13 tomato varieties were screened against F. equiseti to explore the resistance potential of the varieties against the disease. Out of 13 varieties only 2 varieties Roma and Hybrid showed resistance to the disease, while the other 69% were highly susceptible. Based on cluster analysis for genetic diversity it was reported that susceptible varieties are only 8% genetically different and share same genetic pool. We reported that the wild species of tomato Solanum pimpinellifolium (Sp- 2093) showed complete immunity and were remain unaffected having 25% genetic difference with other varieties tested. Thus wild tomato species may provide the source of resistance required to develop resistant variety against the emerging wilt pathogen F. equiseti. The data regarding virluence structure and resisatnt variety that is presented in this study will suport more focused efforts in the management of tomato wilt caused by Fusarium species and that resistant features of wild tomato variety Sp-2093, could be accumulated with other desirable characteristics of different germplasm in one cultivar, which will reduce the chances for new virulent species to evolve.

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