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العنوان
Studies on Drought Tolerance in Barley /
المؤلف
Abd El-Latief, Hend Ali Mahmoud.
هيئة الاعداد
باحث / هند على محمود عبد اللطيف
مشرف / السيد حامد السيد الصعيدى
مناقش / حسام الدين محمد السيد ابراهيم
مناقش / امجد عبد الغفار الجمال
الموضوع
Agronomy. Barley - Drought Tolerance.
تاريخ النشر
2019.
عدد الصفحات
58 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
علوم النبات
تاريخ الإجازة
11/11/2019
مكان الإجازة
جامعة طنطا - كلية الزراعة - Agronomy
الفهرس
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Abstract

Studies on drought tolerance in barley The present study was carried out at Agronomy Department, Faculty of Agriculture, Tanta University. The field experiment was conducted at the experimental Farm, Sakha Agricultural Research Station, A. R. C., Kafr El- Sheikh Governorate, Egypt, during 2014/2015 and 2015/2016 seasons to study the Reponses of twelve barley genotypes under normal and stress irrigation. The aims of the present work, was to examine some barley genotypes under normal and drought condition using some growth and yield measurement to determine the most tolerance one could be used to obtained high biological and grain yield under water stress conditions. Plant materials: Twelve barely genotypes i.e. Giza 117, Giza 118, Giza 121, Giza 123, Giza 124, Giza 125, Giza 126, Giza 2000, Giza 132, Giza 133, Giza 127 and Giza 128 were chosen for the study based on their reputed differences in yield performance under normal and stress conditions. The obtained results could be summarized as follows: 4.1. Analysis of variances: All the studied characters were significantly affected by water stress in both growing seasons and their combined analysis, except for total chlorophyll content in both seasons, 1000-grain weight in both seasons and combined analysis, maturity date and harvest index in the first season. The results indicated that, the normal irrigation exceed the stress irrigation for all studied traits in both seasons and their combined analysis, except total chlorophyll content and harvest index in both seasons and their combined analysis and 1000-grain weight in the first season. B-Mean performances: 1. Total chlorophyll content: It could be clear that Giza 127 seemed to be the most stable one among all tested genotypes where, it gave the highest values of Total chlorophyll under normal condition both seasons and the combined data respectively. These values insignificant increased under stress condition in both seasons and the combined data respectively. On the other side, the behavior of all others genotypes differed from environment to another and ranked differently from stress to normal irrigation. Also, the results showed that Giza 2000 genotypes seemed to be the most sensitive one to water stress among all tested genotypes in this traits in both seasons and the combined data. 2. Days to maturity: The results showed that that Giza 121 and Giza 132 were the earliest among all tested genotypes under normal irrigation in both season and the combined data, While, Giza 2000, Giza 132 and Giza 133 were the earliest among all tested genotypes under stress irrigation in both season and the combined data. On the other side, Giza 125 under normal and stress irrigation was the latest one among all tested genotypes in both season and the combined data. Our data indicated that Giza 128 showed high stability under both irrigation environments. On the other hand, Giza 125 was the most sensitive one among all tested genotypes in this trait to water stress condition. 3. Plant height: It could be detected that Giza 118, Giza 121, Giza 123 and Giza 124 were the tallest among all tested genotypes under normal and stress irrigation in both season and the combined data. Giza 123 was the most sensitive one among all tested genotypes in this trait to water stress. 4. Spikes number/m2: The two barley cultivars Giza 2000 and Giza 132 gave the highest number of spikes/m2 among all tested genotypes under normal and stress irrigation in both season and the combined data. Giza 118 was the most sensitive one among all tested genotypes in this trait to water stress condition. 5. Spike length: The three barley cultivars Giza 125, Giza 2000 and Giza 132 showed the highest spike length among all tested genotypes under normal irrigation in both season and the combined data, While, Giza 118, Giza 123, Giza 124 and Giza 2000 had the highest spike length among all tested genotypes under stress irrigation in both season and the combined data. Giza 125 was the most sensitive one among all tested genotypes in this trait to water stress condition. 6. Grains number per spike: The result showed that Giza 125, and Giza 127 had the highest number of grains/spike among all tested genotypes under normal irrigation in both season and the combined data, While, Giza 121, Giza 123 and Giza 127 had the highest number of grains/spike among all tested genotypes under stress irrigation in both season and the combined data. Giza 125 was the most sensitive one among all tested genotypes in this trait to water stress condition. 7. 1000-grain weight (g): The result showed that Giza 124, Giza 126 and Giza 128 had the highest 1000-grain weight among all tested genotypes under normal and stress irrigation in both season and the combined data. Giza 133 was the most sensitive one among all tested genotypes in this trait to water stress condition. In the contrast of Giza 133 among all tested genotypes showed an increase in 1000-grain weight under stress irrigation compared with normal irrigation in both seasons and the combined data. 8. Biological yield: The Results indicated that highly significant different among irrigation treatments in both seasons, where the irrigated treatment out yielded the stressed treatment. the result showed that Giza 118, Giza 126 and Giza 2000 had the highest biological yield among all tested genotypes under normal irrigation in both season and the combined data, While, Giza 126 and Giza 132 had the highest biological yield among all tested genotypes under stress irrigation in both season and the combined data.. Giza 126 was the most sensitive one among all tested genotypes in this trait to water stress. 9. Grain yield: The result indicate that Giza 126, Giza 2000 and Giza 127 had the highest grain yield among all tested genotypes under normal irrigation in both season and the combined data, While, Giza 2000, Giza 132 and Giza 127 had the highest grain yield among all tested genotypes under stress irrigation in both season and the combined data. Giza 126 was the most sensitive one among all tested genotypes in this trait to water stress condition stress irrigation in both seasons and their combined data respectively. 10. Harvest index: The result showed that Giza 133 and Giza 127 give the highest harvest indices among all tested genotypes under normal and stress irrigation in both season and the combined data. Our data indicated that harvest indices of all tested genotypes increase under stress irrigation compared to normal irrigation in both season and the combined data. Generally, this study showed that, the best genotypes of barley for yield parameters and some of its components under drought conditions were Giza 118, Giza 126, Giza 2000, Giza 132 and Giza 127 in both seasons and the combined data.