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Screening of bread wheat (Triticum aestivum L.) genotypes for drought tolerance under field conditions
Other Title(s)
غربلة تراكيب وراثية من حنطة الخبز (Triticum aestivum L.) لتحمل الجفاف تحت ظروف الحقل
Dissertant
Thesis advisor
al-Sadawi, Ibrahim Shuayb
al-Shahwani, Iyad Wajih Rauf
Comitee Members
al-Shamma, Laith M. J.
al-Araji, Kazim Hashim Yasin
Yunus, Muayyad A.
University
University of Baghdad
Faculty
College of Science
Department
Department of Biology
University Country
Iraq
Degree
Master
Degree Date
2013
English Abstract
Field trial was conducted during the growing season of 2011-2012 at the Research Field, Department of Biology, College of Science, Baghdad University to test the performance of seven cultivars of wheat grown under different soil water stresses.
Several agronomic and physiological traits and yield and yield components of the test cultivars were determined. Field plots (1×2 m) were randomly made in the field equipped with rain fall shelter to avoid rains.
Grains of wheat cultivars were sown manually in their respective plots in rows with a distance of 20cm between rows and at seed rate of 3g per row (150 kg/ha).
The experiment was conducted in randomized complete block design (RCBD) under split plot arrangement with five replications.
The cultivars were kept in the sub plot, while water stress treatment was assigned as main plot.
The data were analyzed by analysis of variance (ANOVA).
The plots were fertilized by nitrogen and phosphorus fertilizers as recommended for wheat.
Water stress was applied by irrigated the plots to the soil field capacity then withheld next irrigation until the soil moisture of the respective plots depleted to 50 (control), 25 and 15% of soil field capacity. Results indicated that the water deficit stress significantly reduced yield and yield components of all test cultivars; in most cases, the reduction increased with the increased water stress.
Also, the drought stress significantly reduced biological yield, leaf area, plant height, number of tillers, relative water content (RWC), total chlorophyll for leaves, and increased harvest index (HI), proline accumulation in leaves, and protein content of grain. The results also showed significant differences in most of the studied parameters.
Cultivars Rabyaa, Latifiya and Abu-Graib 3 were 11 superior in grain and biological yields and most of yield components (number of spikes/m2, number of grains/spike and 1000-grain weight) compared to other cultivars including Sham 6 and IPA 99 which recorded lower values of these traits.
Subsequent analyses revealed that the superior cultivars (Rabyaa, Latifiya and Abu-Graib 3) exhibited higher leaf area, RWC, plant height, chlorophyll content, proline accumulation and HI compared to Sham 6 and IPA 99 cultivars.
This suggests that the aforementioned characters are useful criteria that may be used for screening wheat genotypes for drought tolerance.
Main Subjects
Topics
No. of Pages
48
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Literatures review.
Chapter Three : Materials and methods.
Chapter Four : Results.
Chapter Five : Discussion.
Conclusion and recommendations.
References.
American Psychological Association (APA)
al-Tamimi, Hamid Nuri Ghazal. (2013). Screening of bread wheat (Triticum aestivum L.) genotypes for drought tolerance under field conditions. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-597971
Modern Language Association (MLA)
al-Tamimi, Hamid Nuri Ghazal. Screening of bread wheat (Triticum aestivum L.) genotypes for drought tolerance under field conditions. (Master's theses Theses and Dissertations Master). University of Baghdad. (2013).
https://search.emarefa.net/detail/BIM-597971
American Medical Association (AMA)
al-Tamimi, Hamid Nuri Ghazal. (2013). Screening of bread wheat (Triticum aestivum L.) genotypes for drought tolerance under field conditions. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-597971
Language
English
Data Type
Arab Theses
Record ID
BIM-597971