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In order to evaluate the genetic diversity of sugar beet half sib families (48 lines and one control cultivar) to water stress in field conditions were used randomized complete block design with three replications in Khorasan Razavi Agricultural and Natural Resources Research and Education Center in 2015. In this research, traits such as root yield, sugar yield, sugar content of root, leaf number, index of difference between the temperature of air and leaf, succulence index, leaf relative water content, specific leaf weight, leaf color score, leaf growth score, postural leaf, root growth score and ratio of length to width of root were measured. The results showed that there were significant differences (p≤0.01) between studied genotypes for all traits. In this research, there were significant positive correlations between root yield and sugar yield. Significant and positive correlations were obtained between root yield and leaf color score and root growth score. While, significant and negative correlations were observed between root yield, leaf number and ratio of length to width of root. The dendrogram generated from the cluster analysis for sugar yield classified genotypes into four main groups. Factor analysis led to four loading factors which explained 73.2 percent of total variation. Hf4 s1 genotype showed superiority for root yield, sugar yield and leaf color score than the other genotypes and in other words, has a high potential for drought tolerance

Type of Study: Research | Subject: General

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