First Report of Phytophthora sojae and its Pathotypes Affecting Soybean in Uruguay

Authors

  • Agustina Sans Universidad de la República, Facultad de Agronomía
  • Marcelo Rodríguez INIA La Estanzuela. Ruta 50 km 11, 70000 Colonia, Uruguay
  • Paula Silva INIA La Estanzuela. Ruta 50 km 11, 70000 Colonia, Uruguay
  • Silvina Stewart INIA La Estanzuela. Ruta 50 km 11, 70000 Colonia, Uruguay

DOI:

https://doi.org/10.31285/AGRO.21.1.10

Keywords:

resistant genes, avirulence genes, Rps, Phytophthora stem and root rot

Abstract

Stem and root rot caused by Phytophthora sojae is a disease that causes important losses in soybean worldwide and regionally. This is the first report of this pathogen affecting soybean in Uruguay. Using an international 14 differential set, seven different races/pathotypes were determined out of the 14 isolates of P. sojae obtained from symptomatic plants. Fifty seven percent of these belonged to a single pathotype (vir1b, 3a, 3b, 5), and the remaining six isolates resulted each a unique pathotype including some races known as 4, 14 and 25. Knowing which pathotypes predominate in the country is crucial to select for resistance within a soybean breeding program, and also to test their compatibility on commercial varieties.

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Published

2017-06-01

How to Cite

1.
Sans A, Rodríguez M, Silva P, Stewart S. First Report of Phytophthora sojae and its Pathotypes Affecting Soybean in Uruguay. Agrocienc Urug [Internet]. 2017 Jun. 1 [cited 2024 Mar. 5];21(1):89-94. Available from: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/178

Issue

Section

Plant protection
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