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  • 1
    Electronic Resource
    Electronic Resource
    Resistance in Lycopersicon species to black leaf mold caused by Pseudocercospora Fuligena (1993)
    Springer
    Euphytica 71 (1993), S. 125-130 
    Details
    ISSN: 1573-5060
    Keywords: black leaf mold ; epidemiology ; host resistance ; Lycopersicon species ; Pseudocercospora Fuligena ; tomato
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Over 540 accessions of wild Lycopersicon species or their crosses with L. esculentum were screened for resistance in a series of trials. Forty-six accessions were selected for the final screening trial based on lower disease ratings in previous trials. Of these, L. hirsutum had the greatest number of resistant accessions, followed by L. esculentum and L. peruvianum. Twenty accessions were quantified for their levels of resistance based on leaf area infected, area under disease progress curve (AUDPC), and the degree of sporulation. There was a significant positive correlation between the AUDPC calculated from 20 accessions evaluated under growth room and field conditions. Five L. hirsutum accessions had no sporulation associated with leaf lesions, whereas L. esculentum accessions had an average of 1.6×104 conidia/cm2 of leaf tissue. There was significant positive correlation between the AUDPC values and the number of conidia per cm2 of leaf tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023475
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  • 2
    Electronic Resource
    Electronic Resource
    Inheritance of black leaf mold resistance in tomato (1995)
    Springer
    Euphytica 86 (1995), S. 111-115 
    Details
    ISSN: 1573-5060
    Keywords: inheritance ; black leaf mold ; Pseudocercospora fuligena ; host resistance ; tomato ; Lycopersicon esculentum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Inheritance of black leaf mold (BLM) (caused by Pseudocercospora fuligena) resistance was studied in four crosses involving two resistant Lycopersicon accessions (PI134417, L. hirsutum and PI254655, L. esculentum) and four susceptible Asian Vegetable Research and Development Center tomato lines (CLN657BC1F2-267-0-3-12-7, CL143-0-10-3-0-1-10, CLN698BC1F2-358-4-13 and CL5915-93D4-1-0-3). For each cross, six generations, i.e. P1, P2, F1, F2, BC1F1 and BC1F2 were evaluated following inoculations with isolate Pf-2 of P. fuligena. Chi-square analyses of the data based on the ratio of resistant to susceptible plants in the F2 in three of four crosses gave a good fit to a segregation ratio of 1 R : 15 S, and BC1F2 data in three of four crosses gave an acceptable fit to the segregation ratio of 1 R : 63 S. The results indicate that resistance to BLM may be conditioned by two recessive genes acting epistatically in both PI134417 and PI254655.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022016
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