Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 414405
Title Genetic and phenotypic diversity of Sclerotium rolfsii Sacc. in groundnut fields in central Vietnam
Author(s) Le, N.C.; Mendes, R.; Kruijt, M.; Raaijmakers, J.
Source Plant Disease 96 (2012)3. - ISSN 0191-2917 - p. 389 - 397.
Department(s) Laboratory of Phytopathology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) teleomorph athelia-rolfsii - stem rot - mycelial compatibility - comparative growth - peanut cultivars - 1st report - pentachloronitrobenzene - incompatibility - tebuconazole - variability
Abstract Groundnut (Arachis hypogaea L.) is an economically important legume crop in Vietnam and many other countries worldwide. Stem and pod rot, caused by the soil-borne fungus Sclerotium rolfsii Sacc., is a major yield limiting factor in groundnut cultivation. To develop sustainable measures to control this disease, fundamental knowledge of the epidemiology and diversity of S. rolfsii populations is essential. In this study, disease incidence was monitored in eight groundnut areas in central Vietnam with a total of 240 observational field plots. The results showed that 5-25% of the field-grown groundnut plants were infected by S. rolfsii. Based on ITS-rDNA sequence analyses, three distinct groups were identified among a total of 103 randomly selected S. rolfsii field isolates, with the majority of the isolates (n=90) in one ITS group. S. rolfsii isolates originating from groundnut, tomato and taro were all pathogenic on groundnut and relatively sensitive to the fungicide tebuconazole, but displayed substantial diversity of various genetic and phenotypic traits including mycelial compatibility, growth rate, and sclerotial characteristics.
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