Abstract

This experiment was designed in order to find out the feasibility of winter sowing and identifying resistant genotypes to bolting in Moghan during 2011–12. In this study, 25 genotypes were evaluated as a completely randomized block design with four replications in Moghan region, Iran. The measured characters were flowering stem percentage, root yield, sucrose content, sodium, potassium, harmful nitrogen content, basicity coefficient, molasses sugar, gross sugar yield, extractable white sugar, white sugar yield and extraction coefficient. There were significant differences between genotypes in the measured traits. Bolting phenomenon was not observed in Superma, Azba, Luante, Giada, HI 1114, ST 12038, Chimne and Munatono cultivars but HI 1059 and (FC607*474)*Pool-PC.F2-HSF60-P.3 genotypes showed the highest bolting percentage (61.73 and 66.44, respectively). Javaher, HI 0549, HI 0541, Nexus, HI 0826 and Antek cultivars were in a group for root yield (with an average of 84.35 t/ha). Also, (FC607*474)*Pool-PC.F2-HSF60-P.3 genotype with 37.60 t/ha had the lowest root yield. Since low sugar content of root is the problem of Moghan sugar factory, results showed that winter sowing showed that HI 1059 cultivar had 18.46% sugar and the average of yield in all of the genotypes was 15.45%.