Assessment of salinity stress tolerance in some barley genotypes

• Published in: Alexandria journal of agricultural research 2019-06, Vol.64 (3), p.195-206
• Main Authors: al-Wakil, Sali al-Mursi Ali, Abd al-Azim, Ashjan Muhammad, Mustafa, al-Shayma al-Sayyid Ibrahim
• Format: Article
• Language: ara ; eng
• ISSN: 0044-7250; 2535-1931
• DOI: 10.21608/alexja.2019.70133

This study examined seven barley genotypes in two evaluation experiments; the 1st under normal condition at Sakha station 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 Corps Research Institute, Agricultural Research Center, Egypt. During 2017 season to study the efficacy of barley seed with characters under different salinity levels (0, 10, 12, 14 and 16 dSm-1) using Rashid salt. The randomized complete block design 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) and harvest index (HI). Other five traits were recorded in Laboratory experiment; shoot length, root length, seedling dry weight (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 and highly significant for all studied traits; Results revealed that Line 4, Line 2 and line1 gave the highest values under two conditions in both seasons for grain yield (t.ha-1). For indices of salinity tolerance, the Productivity MP Values obtained by 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 in connection. Compared with other Salinity levels. On the other hand, the highest harmful of parameters was obtained by Salinity level (16 dSm-1). تم تقييم سبع تراكيب وراثية من الشعير في بيئتين مختلفتين، الأولي تحت الظروف الطبيعية في محطة بحوث سخا والثانية تحت ظروف الملوحة في محطة بحوث الحسينية خلال موسمي النمو (۲۰۱۷/۲۰۱٦ و۲۰۱۸/۲۰۱۷) وتم إجراء التجربة المعملية بقسم تكنولوجيا البذور بالمنصورة التابعين لمركز البحوث الزراعية. وذلك لدراسة مدي تأثر الإنبات والصفات الأخرى بالتعرض لمستويات مختلفة من الملوحة (٠ و١٠ و١٢ و١٤ و١٦) باستخدام ملح رشيد. وذلك باستخدام تصميم القطاعات الكاملة العشوائية في ثلاث مكررات. وقد تم قياس عشرة صفات هي عدد الأيام حتى طرد السنابل وعدد الأيام حتى النضج وطول النبات وطول السنبلة وعدد حبوب السنبلة وعدد السنابل /م٢ ومحصول الحبوب ومحصول القش ودليل الحصاد كما تم قياس خمسة صفات في التجربة المعملية وهي طول الجذ