Tomato early blight (Alternaria solani): the pathogen, genetics, and breeding for resistance

  title={Tomato early blight (Alternaria solani): the pathogen, genetics, and breeding for resistance},
  author={Reni Chaerani and Roeland E. Voorrips},
  journal={Journal of General Plant Pathology},
Alternaria solani causes diseases on foliage (early blight), basal stems of seedlings (collar rot), stems of adult plants (stem lesions), and fruits (fruit rot) of tomato. Early blight is the most destructive of these diseases and hence receives considerable attention in breeding. For over 60 years, breeding for early blight resistance has been practiced, but the development of cultivars with high levels of resistance has been hampered by the lack of sources of strong resistance in the… 

Related wild species for breeding of tomato resistant to early blight disease (Alternaria solani)

  • Chaerani
  • Physics, Biology
    IOP Conference Series: Earth and Environmental Science
  • 2020
This review presents sources of early blight resistance in wild species of tomato and efforts in dissectingEarly blight resistance QTL via linkage analysis with molecular markers, and strategies to obtain closely-linked markers and genomics-assisted breeding to facilitate the introgression of useful resistance genes to cultivated tomato are discussed.

Current Status of Early Blight Resistance in Tomato: An Update

The current understanding of causal agents of EB of tomato, resistance genetics and breeding, problems associated with breeding and future prospects are reviewed.

Characterization of Early Blight Resistance in a Recombinant Inbred Line Population of Tomato: I. Heritability and Trait Correlations

A recombinant inbred line (RIL) population of tomato was used, previously developed from a cross between S. pimpinellifolium accession LA 2093 and S. lycopersicum tomato breeding line NCEBR-1, to determine the inheritance of EB resistance.

Genetics, Genomics and Breeding of Late Blight and Early Blight Resistance in Tomato

This review will focus on the current knowledge of both LB and EB with respect to the causal pathogens, host resistances, and genetics and breeding progresses.

Resistance to Alternaria solani in hybrids between a Solanum tuberosum haploid and S. raphanifolium.

In this study, an early blight resistant clone of the diploid wild species S. raphanifolium was crossed as a male to a haploid (2n=2x) of cultivated potato to contribute genes for early blight resistance.

Efficacy of fungicides in the management of early blight of tomato (Alternaria solani).

During the last few years early blight has been occurring almost every year primarily due to the soil.

QTL identification for early blight resistance (Alternaria solani) in a Solanum lycopersicum × S. arcanum cross

A quantitative trait loci (QTL) mapping study was performed in F2 and F3 populations derived from the cross between the susceptible Solanum lycopersicum cv.

Characterization of early blight resistance in a recombinant inbred line population of tomato: II. Identification of QTLs and their co-localization with candidate resistance genes

The goals of this study were to identify quantitative trait loci (QTLs) conferring resistance to EB in a resistant accession (LA 2093) of the tomato wild 150 and discover putative candidate resistance genes and expressed sequence tags (ESTs) that co-localize with the QTLs.

Evaluation of tomato genotypes for early blight disease resistance caused by Alternaria solani in Pakistan

The moderately resistant germplasm with very poor horticultural traits can nevertheless be used in resistance breeding programmes for developing superior cultivars and hybrids having new resistance genes to EB with a wider genetic base.


The data revealed that early blight resistance was quantitatively controlled by more than one gene and the magnitude of the environmental factors on the total variation was revealed.



Mapping QTLs conferring early blight (Alternaria solani) resistance in a Lycopersicon esculentum×L. hirsutum cross by selective genotyping

This study identified and validated quantitative trait loci conferring EB resistance in an accession of the tomato wild species L. hirsutum Humb.

Identification of QTLs for early blight (Alternaria solani) resistance in tomato using backcross populations of a Lycopersicon esculentum × L. hirsutum cross

QTL results were highly consistent across generations, years and mapping approaches, and indicated the stability of the identified QTLs and their potential usefulness for improving tomato EB resistance using marker-assisted selection (MAS).

Heritability of early blight resistance in a Lycopersicon esculentum×Lycopersicon hirsutum cross estimated by correlation between parent and progeny

Sixteen-hundred BC1 plants of a cross between an early blight (EB) susceptible tomato and a resistant accession of the tomato wild species Lycopersicon hirsutum Humb.

Screening for resistance to early blight (Alternaria solani) in potato (Solanum tuberosum L.) using toxic metabolites produced by the fungus

SummaryThe phytotoxic components of the culture filtrate of the fungusAlternaria solani Sor, which causes early blight in potato, were used in this study to differentiate between resistant and

Genetics of resistance to early blight (Alternaria solani Sorauer) in tomato (Lycopersicon esculentum L.)

Evaluation of parents, F1, F2 and backcross generations of IHR1816 (resistance) × IHR1939 (Resistance) revealed that the early blight resistance genes in IHR 1816 (Lycopersicon esculentum NCEBR-1) and IHR 1939 (LyCopersicon pimpinellifolium L4394) are independent.

Genetic Resistance to Early Blight in Tomato Breeding Lines

Tomato (Lycopersicon esculentum Mill.) genotypes evaluated for early blight resistance included five tolerant breeding lines, a susceptible cultivar, and seven hybrids among them, indicating additive genetic control.

Assessment of early blight (Alternaria solani) resistance in tomato using a droplet inoculation method

A droplet inoculation method was used for evaluation of tomato resistance to early blight, a destructive foliar disease of tomato caused by Alternaria solani, and offered a fine discrimination of early blight resistance levels.

Comparison of Field, Greenhouse, and Detached-Leaflet Evaluations of Tomato Germ Plasm for Early Blight Resistance.

The overall results indicate the utility of greenhouse evaluation and the inadequacy of detached-leaflet assay for screening tomatoes for EB resistance and there were great correspondences between field and greenhouse resistance across genotypes.

Sources of resistance to early blight, Alternaria solani, and transfer to tomato, Lycopersicon esculentum

Tomato entries reported as early blight resistant were collected and evaluated under severe early blight infection in the warm rainy summer months of 1982-1985 in Mayaguez, Puerto Rico to identify

Parent-offspring correlation estimate of heritability for early blight resistance in tomato, Lycopersicon esculentum Mill.

The heritability (h2) of early blight (EB) resistance in filial progeny of a cross between a susceptible and a resistant tomato breeding lines is estimated, indicating that EB resistance of `NC39E' was heritable.