Virulence diversity of Uromyces Appendiculatus in the Highlands of Guatemala

Authors: MORALES GONZALES, EMANUEL - University Of San Carlos Guatemala; ALDANA, LUIS - University Of San Carlos Guatemala; Pastor Corrales, Marcial - Talo

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Trade Journal
Publication Acceptance Date: 3/1/2016
Publication Date: 6/22/2016
Citation: Morales Gonzales, E.P., Aldana, L.F., Pastor Corrales, M.A. 2016. Virulence diversity of Uromyces Appendiculatus in the Highlands of Guatemala. Bean Improvement Cooperative Annual Report. 59:211-212.

Interpretive Summary:

Technical Abstract: The common bean is planted throughout Guatemala, especially in the highlands of the South East, North East, and South West regions. In these regions, temperatures fluctuate between 16 y 20 °C and the average rain precipitation is about 1000 mm. These conditions are optimum for the rust disease and bean rust is widespread and recurrent in these regions. The rust pathogen, Uromyces appendiculatus, has co-evolved for thousands of years with common beans in Mesoamerica, an area that includes Mexico and countries of Central America. Mesoamerican populations U. appendiculatus are characterized by their high virulence diversity and their capacity to produce rust in bean genotypes of Mesoamerican origin (1). Conversely, Andean common beans tend to be resistant to the Mesoamerican virulence diversity (1). Since little is known about the virulence diversity of U. appendiculatus in Guatemala, the objective of this study was to collect isolates in the highlands of Guatemala and study their virulence diversity.