Journal of Crop Breeding

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Ghasemi M, Toorchi M, Aharizad S, Khorshid A. (2021). Evaluation of Biochemical Indices to Introduce Superior Genotypes of Sugar Beet (Beta Vulgaris L.) under Water Deficit Stress. J Crop Breed. 13(39), 219-227. doi:10.52547/jcb.13.39.219
URL: http://jcb.sanru.ac.ir/article-1-1268-en.html

    Water deficit is one of the main problems in reducing agricultural production. Due to arid and semi-arid climatic conditions, identifying genotypes tolerant to water deficit stress is of great importance in Iran. In this regard, this study was conducted at the University of Tabriz in 2019 by investigating the effect of water deficit stress on ten sugar beet genotypes in split plots based on randomized complete blocks design in three replications. The main factor consisted of two irrigation levels (optimal and water deficit), and the sub-factor included ten sugar beet genotypes. In this experiment, we planted sugar beet seeds in PVC tubes. The evaluated traits included malondialdehyde, hydrogen peroxide, proline content, chlorophyll a and b, carotenoids, and soluble sugars. Based on the analysis of variance, the effect of irrigation, genotype, and irrigation interaction × genotype for all traits was significant at the probability level of one percent. Water deficit stress reduced chlorophyll a, b, and carotenoid traits. Water deficit stress also increases the properties of malondialdehyde, hydrogen peroxide, proline content, and soluble sugars. The genotype of number five was identified as a tolerant genotype based on malondialdehyde, hydrogen peroxide, and proline content indices. Based on chlorophyll a, b, carotenoid, and soluble sugars indices, The genotype of number ten was identified as a genotype tolerant to water deficit stress. Due to the tolerance of genotype No. 10 to salinity stress, chlorophyll indices and soluble sugars can be used to select genotypes tolerant to water deficit stress.