f. nazarian

To study the effect of biochar and superabsorbent on the chemical composition of Satureja rechingeri Jamzad essential oil, under drought stress conditions, a factorial split-plot experiment was conducted in a randomized complete block design with three replications in 2018-2019 at the Medicinal Plant Research Farm of Lorestan University. Treatments included drought stress as the main plot at three levels (100, 80, and 60% of water requirement) and cow manure biochar at two levels (0 and 10 ton ha-1), and stockosorb hydrogel at three levels (0, 60, and 120 mg plant-1) as subplots. Twenty-four compounds were identified in aerial parts essential oil of the plant using GC-MS. The main constituents included carvacrol (76.6%), γ-terpinene (5.8%), p < /em>-cymene (3%), terpinen-4-ol (2.5%), 1,8-cineole (2%), and linalool (0.9%). The results showed that the highest amount of carvacrol (90.8%) was observed in severe moisture stress+biochar+60 mg stockosorb and the lowest (73.8%) was observed in stress-free control treatment with biochar+120 mg stockosorb. The results showed that interactions between drought stress and biochar had a significant effect on essential oil yield. Also, no correlation was observed between the presence and absence of stockosorb superabsorbent with different compounds of Satureja rechingeri essential oil.

To study genetic of some characters in bread wheat lines under dryland conditions, a diallel crossing design was conducted. Six lines were crossed unilaterally in spring of 2001. In the following year, parents and F1s were evaluated in RCB design with three replications in the Agricultural Research Field of Lorestan University. Plant height, heading date, leaf angle, leaf rolling, chlorophyll fluorescence, flag leaf length, awn length, plant biomass weight, number of seed per spike and spike harvest index were measured. Analysis of variance showed significant differences for all characters except for number of seed per spike and spike harvest index. Data were analyzed by Griffing (method II and model II) and Hayman's methods (Morley and lones method). General combining ability (GCA) was significant for all characters except for chlorophyll fluorescence. Specific combining ability (SCA) was also significant for all characters except for plant height, awn length and plant biomass weight. In general, genes additive effects revealed the effectiveness of selection for plant height. Additive and non additive effects together were effective for selection in segregating population for heading date, leaf rolling, flag leaf length and awn length. Finally non-additive effects were effective for chlorophyll fluorescence and leaf angle