Detached-leaflet evaluation of tomato germplasm for late blight resistance and its correspondence to field and greenhouse screenings

Majid R. Foolad, Matthew T. Sullenberger, Hamid Ashrafi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Breeding for disease resistance requires efficient techniques for screening large plant populations. Late blight (LB), caused by the oomycete Phytophthora infestans, is one of the most devastating diseases of tomato (Solanum lycopersicum) worldwide, and there is a great interest in developing cultivars with resistance to this pathogen. Screening for LB resistance is commonly conducted under field or greenhouse conditions using whole plants. In a previous study, we demonstrated correspondence between field and greenhouse screening of tomato for LB resistance. Here, we report the use of a detached-leaflet assay for such screening. Seventytwo genotypes from two tomato species, varying in degree of resistance and susceptibility to LB, were evaluated in two replicated experiments for response to LB in a detached-leaflet assay, and the results were compared with those previously obtained from field and greenhouse screening of the same genotypes. There were significant (P < 0.001) positive correlations between replications (average r = 0.75) and experiments (average r = 0.72), suggesting that the detached-leaflet experiments were consistent. Further, there were significant (P < 0.001) positive correlations between responses in the detached-leaflet assay and those from field (r = 0.82) and greenhouse screenings (r = 0.84), suggesting reliability of the detached-leaflet assay. The results indicate the utility of the detachedleaflet assay for evaluating tomato for LB resistance, which may facilitate screening of large breeding populations.

Original languageEnglish (US)
Pages (from-to)718-722
Number of pages5
JournalPlant disease
Volume99
Issue number5
DOIs
StatePublished - May 1 2015

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Phytophthora infestans
germplasm
tomatoes
screening
greenhouses
assays
genotype
Oomycetes
breeding
Solanum lycopersicum
disease resistance
pathogens
cultivars

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Plant Science

Cite this

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title = "Detached-leaflet evaluation of tomato germplasm for late blight resistance and its correspondence to field and greenhouse screenings",
abstract = "Breeding for disease resistance requires efficient techniques for screening large plant populations. Late blight (LB), caused by the oomycete Phytophthora infestans, is one of the most devastating diseases of tomato (Solanum lycopersicum) worldwide, and there is a great interest in developing cultivars with resistance to this pathogen. Screening for LB resistance is commonly conducted under field or greenhouse conditions using whole plants. In a previous study, we demonstrated correspondence between field and greenhouse screening of tomato for LB resistance. Here, we report the use of a detached-leaflet assay for such screening. Seventytwo genotypes from two tomato species, varying in degree of resistance and susceptibility to LB, were evaluated in two replicated experiments for response to LB in a detached-leaflet assay, and the results were compared with those previously obtained from field and greenhouse screening of the same genotypes. There were significant (P < 0.001) positive correlations between replications (average r = 0.75) and experiments (average r = 0.72), suggesting that the detached-leaflet experiments were consistent. Further, there were significant (P < 0.001) positive correlations between responses in the detached-leaflet assay and those from field (r = 0.82) and greenhouse screenings (r = 0.84), suggesting reliability of the detached-leaflet assay. The results indicate the utility of the detachedleaflet assay for evaluating tomato for LB resistance, which may facilitate screening of large breeding populations.",
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Detached-leaflet evaluation of tomato germplasm for late blight resistance and its correspondence to field and greenhouse screenings. / Foolad, Majid R.; Sullenberger, Matthew T.; Ashrafi, Hamid.

In: Plant disease, Vol. 99, No. 5, 01.05.2015, p. 718-722.

Research output: Contribution to journalArticle

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