Assessment of Salinity Stress Tolerance in Some Barley Genotypes

Abstract

This study examined seven barley genotypes in two evaluation experiments; the 1st under normal condition at Sakhastation while the 2nd under salt stress at the El-Hosinia station, during two growing seasons (2016/2017 and 2017/2018)and made Laboratory experiment at Seed Technology Research Unit in Mansura, Dakahalia Governorate, Field CorpsResearch Institute, Agricultural Research Center, Egypt. During 2017 season to study the efficacy of barley seed withcharacters under different salinity levels(0, 10, 12, 14 and 16 dSm-1) using Rashid salt. The randomized complete blockdesign with 3 replications was used for each experiment. Nine traits were recorded, days to heading, days to maturity,plant height (cm), spike length(cm), No. of spikes m-2, No. of grains spike-1, straw yield (t. ha-1), grain yield (t.ha-1) andharvest index (HI). Other five traits were recorded in Laboratory experiment; shoot length, root length, seedling dryweight (g), K+ content and N+ a content. Besides, eight stress tolerance indices were evaluated (TOL, MP, STI, GMP, Yr,DSI, YSI, YI). The combined analysis of variance for years, locations, genotypes, and interaction was significant andhighly significant for all studied traits; Results revealed that Line 4, Line 2 and line1 gave the highest values under twoconditions in both seasons for grain yield (t.ha-1). For indices of salinity tolerance, the Productivity MP Values obtainedby Line4; Line2; Giza123 and Line1. Moreover, these four tolerant genotypes recorded high values for GMP, STI, YSI,and YI. Significant differences were observed between salinity levels, whereas level (10dSm-1) was lowest harmful inconnection. Compared with other Salinity levels. On the other hand, the highest harmful of parameters was obtained bySalinity level(16 dSm-1).