LINKAGE RELATION OF RESISTANCE TO CLADOSPORIUM LEAF MOLD (Cf-2) AND ROOT-KNOT NEMATODES (Mi) IN TOMATO AND A NEW GENE FOR LEAF MOLD RESISTANCE (Cf-11)

1980 ◽  
Vol 22 (2) ◽  
pp. 183-186 ◽  
Author(s):  
E. A. Kerr ◽  
Elizabeth Kerr ◽  
Z. A. Patrick ◽  
J. W. Potter
Keyword(s):  
Lycopersicon Esculentum ◽  
Resistance Gene ◽  
High Resistance ◽  
Chromosome 6 ◽  
Cladosporium Fulvum ◽  
Linkage Relation ◽  
Leaf Mold ◽  
New Gene ◽  
Indian River ◽  
Mold Resistance

Mi derived from Anahu and Cf-2 derived from Indian River are approximately at locations 35 and 43 on the long arm of chromosome 6 of the tomato (Lycopersicon esculentum Mill.). Ontario 7716 contains the leaf mold resistance gene Cf-11 which was derived from an aberrant plant of Mass. #2. Both Cf-2 and Cf-11 confer immunity from Cladosporium fulvum Cke. races 1 and 10. Cf-11 confers high resistance to race 6 and slight tolerance to race 12 whereas Cf-2 does not confer any resistance to these races of C. fulvum.

scholarly journals Investigation of Disease Resistance and Cold Tolerance of Solanum lycopersicoides for Tomato Improvement

HortScience ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Lingxia Zhao ◽  
Chengxiang Qiu ◽  
Jingfu Li ◽  
Yourong Chai ◽  
Guoyin Kai ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Low Temperature ◽  
Lycopersicon Esculentum ◽  
Cold Tolerance ◽  
Genetic Improvement ◽  
Genetic Resource ◽  
Agronomic Traits ◽  
Cladosporium Fulvum ◽  
Leaf Mold ◽  
Solanum Lycopersicoides

Solanum lycopersicoides is a valuable genetic resource for tomato (Lycopersicon esculentum) genetic improvement. However, there are few reports on its agronomic traits such as disease resistance and cold tolerance. In this paper, the resistance to cucumber mosaic virus (CMV) and leaf mold (Cladosporium fulvum Cooke) and cold tolerance of five lines of S. lycopersicoides were studied through investigation of disease inoculation and electrolyte leakage analysis. The results showed that S. lycopersicoides was highly resistant or immune to CMV and leaf mold and more tolerant to low temperature than L. esculentum. This study is helpful for the genetic improvement of tomato by using S. lycopersicoides as breeding materials.

scholarly journals Comparative transcriptome analysis between resistant and susceptible tomato lines uncovers the response mechanism of Cf-16-mediated resistance to Cladosporium fulvum

2019 ◽  
Author(s):  
Dongye Zhang ◽  
Huanhuan Yang ◽  
Xiangyang Xu
Keyword(s):  
Transcriptome Analysis ◽  
Early Stage ◽  
Cladosporium Fulvum ◽  
Comparative Transcriptome ◽  
Response Mechanism ◽  
Resistance Response ◽  
Tomato Production ◽  
Comparative Transcriptome Analysis ◽  
Leaf Mold ◽  
Mold Resistance

Abstract Background Leaf mold disease caused by Cladosporium fulvum is a major disease in cultivated tomato plants and affects global tomato production. Some Cf genes, of which Cf-16 is an effective gene for resisting tomato leaf mold, are associated with leaf mold resistance; however, the molecular mechanism is largely unknown. Results we used comparative transcriptome analysis of C. fulvum-resistant (cv. Ontario7816, including the Cf-16 gene) and C. fulvum-susceptible (cv. Moneymaker) tomato lines to identify differentially expressed genes (DEGs) at 4 and 8 days postinfection with C. fulvum. We found that the number of DEGs in the Cf-16 tomatoes was significantly higher than the number of DEGs in the Moneymaker tomatoes. In addition, 1,350 DEGs were shared among Cf-16 groups at 4 and 8 dpi, suggesting the existence of a common core of DEGs in response to C. fulvum infection. Upregulated DEGs were mainly associated with defense processes and phytohormone signaling, including salicylic acid (SA) and jasmonic acid (JA), in the Cf-16 tomato. Moreover, the SA and JA contents significantly increased in the Cf-16 tomato at the early stages of C. fulvum infection. Comprehensively, more upregulated DEGs were found in the Cf-16 tomato than in the Cf-10 and Cf-12 tomatoes at the early stage of C. fulvum infection. However, the significantly enriched defense-signaling pathways involved in Cf-16 had some distinctions from those in Cf-10 and Cf-12. Conclusion Our results provide new insights into the resistance response mechanism of Cf genes to C. fulvum, especially the unique characteristics of Cf-16 in response to C. fulvum infection.

Accumulation of phytoalexins in the compatible interaction between Cladosporium fulvum and tomato in relation to colonization

1991 ◽  
Vol 69 (4) ◽  
pp. 822-830 ◽  
Author(s):  
Ulisses G. Batista ◽  
Verna J. Higgins
Keyword(s):  
Suspension Culture ◽  
Germ Tube ◽  
Plant Cells ◽  
Cladosporium Fulvum ◽  
In Vitro Experiments ◽  
Compatible Interaction ◽  
Leaf Mold ◽  
Production And Distribution ◽  
Fulvia Fulva

The production and distribution of the phytoalexin falcarindiol in tomato foliage infected with leaf mold was examined to determine how the fungus Cladosporium fulvum is able to colonize and sporulate in an apparently antifungal environment. In a compatible interaction (cv. Potentate – C. fulvum race 2.3), by 12 and 15 days after inoculation, solvent-extractable falcarindiol and two other phytoalexins from tomato, compound 2 (probably falcarinol) and compound 3 (unidentified), reached concentrations considerably in excess of ED50 values for inhibition of the fungus. In contrast, intercellular (apoplastic) fluids obtained from similarly infected leaflets contained only traces of falcarindiol. ED50 values for germination and germ-tube growth of C. fulvum increased as the incubation time was extended, suggesting that adaptation or recovery was possible at the concentrations tested. In in vitro experiments, C. fulvum appeared to readily metabolize falcarindiol, as did a Lycopersicon cell suspension culture. Binding of falcarindiol to living and dead fungal and plant cells was also observed. Falcarindiol, injected into tomato leaflets, decreased rapidly and was only recovered in trace amounts by 24 h. The results suggest that falcarindiol and probably the two other phytoalexins do not reach sufficient concentrations in the apoplast of an infected susceptible leaf to have an effect on growth and sporulation of C. fulvum. Key words: leaf mold, Fulvia fulva, falcarindiol, falcarinol.

scholarly journals Resistance gene naming and numbering: is it a new gene or not?

2015 ◽  
Vol 71 (3) ◽  
pp. 569-571 ◽  
Author(s):  
Ruth M. Hall ◽  
Stefan Schwarz
Keyword(s):  
Resistance Gene ◽  
New Gene ◽  
Gene Naming

Long-range physical maps of two loci (Aps-1 and GP79) flanking the root-knot nematode resistance gene (Mi) near the centromere of tomato chromosome 6

1993 ◽  
Vol 23 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Raymond A. J. J. van Daelen ◽  
Frans Gerbens ◽  
Fred van Ruissen ◽  
Jac Aarts ◽  
Jan Hontelez ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Long Range ◽  
Nematode Resistance ◽  
Chromosome 6 ◽  
Root Knot Nematode ◽  
Physical Maps ◽  
Nematode Resistance Gene ◽  
Tomato Chromosome

Identification of RFLPs Flanking a Scald Resistance Gene on Barley Chromosome 6

1995 ◽  
Vol 86 (2) ◽  
pp. 152-154 ◽  
Author(s):  
D. C. Abbott ◽  
E. S. Lagudah ◽  
A. H. D. Brown
Keyword(s):  
Resistance Gene ◽  
Barley Chromosome ◽  
Chromosome 6
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