Within-field Pathogenic Diversity of Phytophthora sojae in Commercial Soybean Fields in Iowa

Thumbnail Image
Supplemental Files
Date
2009-09-08
Authors
Robertson, Alison
Cianzio, Sylvia
Cerra, Sarah
Pope, Richard
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Plant Pathology and Microbiology
Abstract

Phytophthora root and stem rot (PRR), caused by the oomycete Phytophthora sojae, is an economically important soybean disease in the north central region of the United States, including Iowa. Previous surveys of the pathogenic diversity of P. sojae in Iowa did not investigate whether multiple pathotypes of the pathogen existed in individual fields. Considering the many pathotypes of P. sojae that have been reported in Iowa, we hypothesized multiple pathotypes could exist within single fields. In the research reported herein, several soil samples were collected systematically from each of two commercial fields with a history of PRR in Iowa, and each soil sample was baited separately for isolates of P. sojae. Numerous pathotypes of P. sojae were detected from both fields. As many as four pathotypes were detected in some soil samples (each consisting of six to eight soil cores), which suggests that a single soybean plant could be subjected to infection by more than one pathotype. This possibility presents important implications in breeding resistant cultivars and in the management of PRR.

Comments

This article is published as Robertson, A. E., Cianzio, S. R., Cerra, S. M., and Pope, R. O. 2009. Within-field pathogenic diversity of Phytophthora sojae in commercial soybean fields in Iowa. Online. Plant Health Progress doi: 10.1094/PHP-2009-0908-01-RS. Posted with permission.

Description
Keywords
Citation
DOI
Copyright
Thu Jan 01 00:00:00 UTC 2009
Collections