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Comprehensive Evaluation of Virulence and Resistance Data: A New Analysis Tool

July 2012 , Volume 96 , Number  7
Pages  1,060 - 1,063

Gabriel A. Schachtel, Biostatistik am FB09, Justus-Liebig University of Giessen, Germany; Amos Dinoor, Department of Plant Pathology and Microbiology, the Robert H. Smith Faculty of Agriculture, Food and the Environment, Hebrew University of Jerusalem, Rehovot, Israel; Antje Herrmann, Institute of Crop Science and Plant Breeding, Christian-Albrechts University of Kiel, Germany; and Evsey Kosman, Institute for Cereal Crops Improvement, the George S. Wise Faculty of Life Sciences, Tel-Aviv University, Israel

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Accepted for publication 17 February 2012.

The functioning and features of the new software package VAT (Virulence Analysis Tool) are introduced. VAT provides a range of methods for the analysis of plant pathosystems. The techniques are applicable to other binary data sets that are organized in large two-way tables, e.g., molecular marker data. The main features are data entry, descriptive tools, and inference statistics by resampling. About 50 well-established or newly developed indices allow a detailed diversity analysis of sexually and asexually reproducing populations. VAT facilitates a comprehensive, effective, and logically consistent evaluation and presentation of virulence and resistance data. A translation option simplifies the comparison of results from differently coded pathotypes. The software package comes with a detailed manual and is freely available on the internet at and at

© 2012 The American Phytopathological Society