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Inheritance of agronomic and physiological characteristics of spring wheat (Triticum sativum L.) lines at salinity stress and normal conditions | ||
| Journal of Plant Physiology and Breeding | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 09 خرداد 1401 | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22034/jppb.2022.47207.1232 | ||
| نویسندگان | ||
Mehri Abbaszadeh1؛ Mohammad Moghaddam   2؛ Majid Norouzi 1؛ Ali Bandehhagh1
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| 1Department of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran | ||
| 2ِDepartment of Plant Breeding and Biotechnology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran; Center of Excellence for Cereal Molecular Breeding, University of Tabriz, Tabriz, Iran | ||
| چکیده | ||
| Inheritance of several physiological and agronomic traits in 92 F4 lines derived from the cross between two wheat (Triticum sativum L.) cultivars (Arg and Moghan3, tolerant and sensitive to salinity, respectively) was studied in a greenhouse under normal and salinity stress conditions using a hydroponic system in 2018. The experiment was carried out as a split-plot design based on randomized complete blocks with two replications. The two salinity levels (control and application of 150 mM NaCl at the three-leaf stage) were arranged in the main plots and the lines in the subplots. Analysis of variance showed significant differences among lines for all of the investigated characters except the K+/Na+ ratio. The line × salinity interaction was significant for the majority of the traits including grain yield. Salinity stress increased the magnitude of leaf temperature, electrolyte leakage, 1000-grain weight and Na+ content and decreased other characters significantly. Transgressive segregation was detected for some traits in both normal and salinity stress conditions. Under both normal and salinity stress conditions, broad-sense and narrow-sense heritability for the traits under study were estimated high (0.72 to 0.99) and moderate to low (0.11-0.62), respectively. The lowest broad-sense (0.72 and 0.66 under normal and salinity stress conditions, respectively) and narrow-sense heritability (0.13 and 0.11 under normal and salinity stress conditions, respectively) belonged to the grain yield. At both conditions, the magnitude of dominance genetic variance was higher than the additive genetic variance for the majority of the traits under study. The average degree of dominance for all traits in both conditions was greater than unity, which showed the existence of over-dominance gene action in controlling the traits under investigation. This research highlights the necessity of exploiting dominance gene effects in breeding programs of wheat under salinity stress conditions. | ||
| کلیدواژهها | ||
| Additive genetic variance؛ Broad-sense heritability؛ Degree of dominance؛ Dominance genetic variance؛ Narrow-sense heritability | ||
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آمار تعداد مشاهده مقاله: 17 |
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