Genetic analysis of a complex hypersensitive reaction to bacterial spot in tomato

Lycopersicon esculentum accession Hawaii 7998 is the only identified source of resistance to Xanthomonas campestris pv. vesicatoria. This resistance is based on a hypersensitive reaction. Interspecific progenies with L. pennellii were generated to analyze the inheritance of a hypersensitive reaction...

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Bibliographic Details
Published in:Phytopathology 1994-02, Vol.84 (2), p.126-132
Main Authors: Wang, J.F, Stall, R.E, Vallejos, C.E
Format: Article
Language:English
Subjects:
ADN
Agronomy. Soil science and plant productions
AMELIORATION DES PLANTES
Biological and medical sciences
FITOMEJORAMIENTO
Fundamental and applied biological sciences. Psychology
GENE
GENES
GENETICA
Genetics and breeding of economic plants
GENETIQUE
GENOTIPOS
GENOTYPE
HEREDITE
HERENCIA GENETICA
HIBRIDACION INTERESPECIFICA
HYBRIDATION INTERSPECIFIQUE
ISOENZIMAS
ISOENZYME
LOCI
LOCUS
LYCOPERSICON ESCULENTUM
LYCOPERSICON PENNELLII
MARCADORES GENETICOS
MARQUEUR GENETIQUE
Pest resistance
Plant pathogens
PODER PATOGENO
POUVOIR PATHOGENE
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
SINTOMAS
SYMPTOME
TECHNIQUE ANALYTIQUE
TECNICAS ANALITICAS
Varietal selection. Specialized plant breeding, plant breeding aims
XANTHOMONAS CAMPESTRIS
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Summary:Lycopersicon esculentum accession Hawaii 7998 is the only identified source of resistance to Xanthomonas campestris pv. vesicatoria. This resistance is based on a hypersensitive reaction. Interspecific progenies with L. pennellii were generated to analyze the inheritance of a hypersensitive reaction. This wild species is susceptible to bacterial spot and has a large number of allelic differences with respect to Hawaii 7998. Eighteen isozymes and a morphological marker were used to probe about 30% of the tomato genome for hypersensitive reaction factors. A rating scale was developed to evaluate the inoculation responses of the parental genotypes and the segregating progenies; evaluations were performed every 8 h after inoculation. Hourly rates of change in score were used to analyze the inheritance of hypersensitive reaction. Linkage between marker loci and hypersensitive reaction factors was tested with two-way contingency tables. Significant heterogeneity between genotypic classes for the relative proportion of plants that changed the necrosis score was interpreted as linkage between the marker locus and a hypersensitive reaction factor. Linkage to the same chromosome 1 markers was detected in the F2 and the BC1 to Hawaii 7998 but not in the reciprocal BC1; this region did not explain all the variation. These results indicated that the hypersensitive response in Hawaii 7998 is controlled by multiple nondominant factors
ISSN:0031-949X
1943-7684
DOI:10.1094/Phyto-84-126