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The response of drought-tolerant sugar beet to salinity stress under field and controlled environmental conditions

Author:
Abbasi, Zahra, Golabadi, Maryam, Khayamim, Samar, Pessarakli, Mohammad
Source:
Journal of plant nutrition 2018 v.41 no.20 pp. 2660-2672
ISSN:
1532-4087
Subject:
breeding programs, drought tolerance, environmental factors, genotype, greenhouse experimentation, greenhouses, nitrogen content, potassium, salt stress, salt tolerance, sodium, sugar beet, sugar content, white sugar
Abstract:
Thirty-four sugar beet drought-tolerant half-sib families were screened in greenhouse experiment under saline (16 dSm⁻¹) and normal conditions, and a subset of 10 tolerant genotypes were selected for evaluating of yield-related traits, Na⁺, K⁺, and α-amino-N nitrogen contents under saline field condition (12 dSm⁻¹). Drought-tolerant genotypes showed a different tolerance level under salt stress. Significant correlation was observed between EP2ₛ and STIEP2 in greenhouse with root yield (RY) in saline field condition. It should be possible that a simple measurement at 16 dSm⁻¹ in the greenhouse can be used as main part of sugar beet salt-tolerant breeding program. In total, genotypes SBSI-DR I-HSF14-P.23 (# 16) and 436B-HSF9-P.27 (# 26) were recognized as salt- and drought-tolerant genotypes with low Na⁺ and K⁺ contents in root and high white sugar content (WSC) and RY in field. A larger panel of genotypes to validate this kind of association is necessary.
Agid:
6296040