SciELO - Scientific Electronic Library Online

vol.17 issue1Polyphenols Extraction and Composition of Tannat Red Wines Produced by Prefermentative Maceration TechniquesFactors Underlying Spatial Variability in Rice (Oryza sativa L.) Grain Quality at Field and Regional Level author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links


Agrociencia (Uruguay)

Print version ISSN 1510-0839On-line version ISSN 2301-1548


GONZALEZ, Matías et al. Resistance to Bacterial Wilt in Solanum commersonii Dun. Agrociencia Uruguay [online]. 2013, vol.17, n.1, pp.45-54. ISSN 1510-0839.

The levels of resistance to bacterial wilt (BW) of potato caused by Ralstonia solanacearum (Rs) are limited. Solanum commersonii (cmm) is a wild tuber-bearing potato highlighted for its resistance to BW. This research aimed to (i) characterize cmm genotypes for resistance to Rs (race 3, biovar 2) using a soil inoculation method, (ii) determine to what extent resistance in cmm is transmissible through sexual reproduction to a susceptible genetic background, and (iii) determine the relationships between a set of Rs strains (race 3, biovar 2) and cmm genotypes in the expression of resistance. The screening was performed under controlled conditions of temperature and light. Accessions collected from different regions of Uruguay showed diversity for resistance to BW: some genotypes were asymptomatic in the response, while for others the symptoms were similar to the susceptible control. Two cmm genotypes with contrasting responses to BW were crossed, and an offspring of 121 genotypes was obtained. The distribution of BW resistance levels in the progeny suggested a polygenetic control for BW resistance; though this conclusion is preliminary regarding that one of the cmm parents was triploid. A factorial experiment using five R. solanacearum strains isolated in Uruguay and five cmm clones showed differences in the virulence between strains. There was no interaction between plant genotype and bacterial isolate, and therefore, under the conditions of this research, BW resistance in cmm was not dependent on the isolate of the pathogen


        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License