Evaluating of salinity stress in sugar beet half-sib families under field and greenhouse experiment
کد مقاله : 1143-2ICH (R1)
نویسندگان:
زهرا عباسی *
گروه سبزی و صیفی، بخش علوم زراعی و باغی، مرکز تحقیقات کشاورزی و منابع طبیعی استان اصفهان، اصفهان - ایران
چکیده مقاله:
Genetic variation of sugar beet plants for salinity tolerance assessed under greenhouse and field conditions. 34 sugar beet half-sib families with high tolerant to drought were screened for seedling growth characteristics in the greenhouse experiment under saline (16 dS.m-1) and normal condition and, based on ranking, a subset of 10 tolerant genotypes were selected for evaluating under saline field condition (12 dS.m-1). In the field experiment, yield-related traits, Na+, K+, and α-amino-N nitrogen contents were recorded. The results showed that drought-tolerant genotypes had a different tolerance level under salt stress. There was wide variation in all the characters studied and the strongest inhibition (71.87 %) was observed for the final establishment percentage (EP2) in the greenhouse experiment. A significant correlation was observed between EP2s and salt tolerant index EP2 (STIEP2) in the greenhouse with root yield in saline field conditions. This association indicates that a simple measurement at 16 dS.m-1 in the greenhouse should be possible as the main part of a sugar beet breeding program for identifying more salt-tolerant genotypes. 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 root yield in the field. Further studies in the greenhouse and field as well are required using a larger panel of genotypes to validate this kind of association.
کلیدواژه ها:
salinity tolerance; field condition; screening; sugar beet (Beta vulgaris L.)
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