study the inheritance of water use efficiency in bread wheat (triticum aestivum) under drought stress condition
نویسندگان
چکیده
water use efficiency is positively correlated with grain yield, and being used for indirect selection of high wheat yield in drought prone environments. yet little is known about genetic control of water use efficiency. in this research, a half diallel mating design was generated from crosses between 8 bread wheat to study the genetic of water use efficiency. parents and f1 progenies were planted in drought stress condition in a randomized complete block design with four replications and water uptake, grain yield, water use efficiency, awn length, fertile tiller number, grains per spike, 1000-grain weight and harvest index were evaluated. additive and dominant effects were significant for all traits. non-additive variation was more important in genotypic disparity of water uptake, grain yield, water use efficiency, fertile tiller number, 1000-grain weight and harvest index. accordingly, bulk, single seed descent and double-haploid methods are suggested in breeding program for these characters. whereas, additive variation had imperative effect on genotypic variation of awn length and grains number per spike. thus, despite of mentioned breeding methods, pedigree and backcross are recommended for these traits. significant high correlation (r=0.88**) between grain yield and water use efficiency demonstrated the importance of water use efficiency in drought stress condition. therefore, selection for higher water use efficiency would improve grain yield in drought stress condition.
منابع مشابه
Genetic Analysis and QTLs Identification of Some Agronomic Traits in Bread Wheat (Triticum aestivum L.) under Drought Stress
In order to study the genetic conditions of some agronomic traits in wheat, a cross was made between Gaspard and Kharchia varieties. F2, F3 and F4 progenies with parents were evaluated under drought conditions. Three-parameter model [m d h] considered as the best fit for number of fertile tiller and flag leaf length using generations mean analysis method. For number of grain per spike and main ...
متن کاملGermplasm Enhancement for Water Stress Tolerance and Storage Insect Resistance in Bread Wheat (Triticum aestivum L.)
This study was carried out during three successive seasons 2004/05, 2005/06 and 2006/07, to evaluate fifty F derived lines (from the F diallel cross), with three check varieties under two different irrigation regimes. 3 2 Twenty different lines were selected from the fifty F lines under each level of irrigation and evaluated under 3 the same conditions in the F and F generations. Also, the effe...
متن کاملDifferential Physiological Responses of Portuguese Bread Wheat (Triticum aestivum L.) Genotypes under Aluminium Stress
The major limitation of cereal production in acidic soils is aluminium (Al) phytotoxicity which inhibits root growth. Recent evidence indicates that different genotypes within the same species have evolved different mechanisms to cope with this stress. With these facts in mind, root responses of two highly Al tolerant Portuguese bread wheat genotypes—Barbela 7/72/92 and Viloso mole—were investi...
متن کاملPhysiological assessment of drought tolerance in wheat (Triticum aestivum L.) varieties under moisture stress conditions
Drought is one of the major limiting factors in wheat production in Pakistan. Five commercial wheat varieties; Chakwal-97, Inqilab-91, Margalla-99, NR-234 and Wafaq2001 were grown in pots in glasshouse. Plants were subjected to three consecutive drought cycles at tillering, pre-anthesis and milky growth stages by withholding water till leaf rolling started. Measurements of physiological respons...
متن کاملgenotypic variation of the trait stem reserves in bread wheat (triticum aestivum l.) genotypes under post anthesis drought stress condition
0
متن کاملevaluation inheritance of drought stress tolerance score of bread wheat (triticum aestivum l.)
in order to increase drought tolerance in bread wheat, an appropriate breeding program based on inheritance of drought tolerance is recommended. in the present study, nine bread wheat cultivars and their f2 progenies were evaluated in a randomized complete block design under normal and drought stress conditions. nine sensitivity/tolerance indices were calculated for studied genotypes and stress...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
تولید گیاهان زراعیجلد ۷، شماره ۱، صفحات ۱۸۱-۱۹۹
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023