Abstract

In order to compare and evaluate different genotypes of sugar beet suffering from Rhizoctonia diseases, an experiment was conducted in a randomized complete block design with four replications in the Agricultural and Natural Resources Research Station of Miandoab, Iran, in 2014. The experimental materials were 16 sugar beet genotypes. Analysis of variance of data showed that there were significant differences among genotypes for all traits, except root sodium content, alkalinity and sugar extract percentage. Based on the results of mean comparison, SBSI-1 genotype had the highest infestation percentage and 31868 and 31870 genotypes showed the lowest infestation percentage. In addition, F 20654 and 31079 genotypes had higher root yield, white sugar content, gross sugar yield and white sugar yield compared with other genotypes. In the present study, there was positive correlation among the white sugar yield with root yield, gross sugar content, white sugar content, gross sugar yield and extract percentage; and significant negative correlation with the traits of infestation percentage, root sodium content and alkalinity. Finally, according to the analysis of data, the 31873, F-20655 and 31079 genotypes were identified as suitable genotypes for cultivation in the presence of Rhizoctonia infestations.