Screening for Resistance Against Ralstonia Solanacearum in Commercially Available Colombian Potato Varieties
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Date
2023Author
Vargas, Christian David
Soto Suárez, Mauricio
Zuluaga, Paola
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Corporación colombiana de investigación agropecuaria - AGROSAVIAPalabras clave
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Abstract
Ralstonia solanacearum, the causal agent of bacterial wilt, is one of the most devastating bacterial diseases
worldwide. In potatoes and many other commercial species such as tomato, banana, plantain, and eggplant, among
others, there is a lack of efficient strategies to control this pathogen. Therefore, using resistant cultivars might be the
best strategy to prevent this disease. However, breeding for bacterial wilt resistance is challenging since latent
infections pose a significant limitation when evaluating resistance to this disease in plant germplasm. Part of the
diversity of potato genetic resources is maintained in the Colombian Central Collection (CCC) of potatoes,
Corporación Colombiana de Investigación Agropecuaria (Agrosavia). With its 2069 accessions, the CCC is a good
source for plant breeding programs. As a first attempt to identify bacterial wilt resistant/tolerant potato sources, 11
commercially available potato varieties were evaluated, representing Andigena and Phureja materials from the CCC.
To this end, plants were drench-inoculated with R. solanacearum. This strain was able to cause severe disease in six of
the 11 accessions tested. Thus, five highly R. solanacearum-resistant accessions were identified. These results represent
a preliminary assessment for identifying bacterial wilt resistance sources that will contribute to establishing a potato
breeding program to face this devasting pathogen before it arrives to Colombia.
Part of the journal
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Ciencia y Tecnología Agropecuaria; Vol 24, Núm.2 (2023): Ciencia y Tecnología Agropecuaria; p. 1-11.
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