Comparison of Yield and Silage Quality of some SorghumBicolor L. Cultivars and Corn under Salinity StressAbouzar Asadi** Plant Improvement and Seed Production Research Center, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran*Corresponding author e-mail: asadi.abzr@gmail.comReceived: 28 October 2021 Accepted: 10 January 2022AbstractSorghum is an excellent alternative forage to corn silage in unfavorable environmental conditions. In order to evaluate eight sorghum cultivars and one corn cultivar (S.C 704 as control) under salinity stress (EC: 10.8 ds/m in soil and 5 ds/m in water), a randomized complete block design with three replicates was used during 2017-2018 cropping season at Fajr Isfahan Agricultural and Livestock CO. research field. Seven morphological traits, forage yield, and dry matter (DM) were determined and 15 traits related to silage were measured after ensiling in a plastic cylinder. The results showed that the Hannibal and Pegah cultivars had the highest forage yield with an average yield of 56.9 and 53.4 tons/h, respectively, whereas corn had the lowest forage yield with an average of 20.5 tons/h under test conditions. Hannibal and Sucrose Photo one BMR cultivars had the highest DM with 26.7% and 26.6%, respectively. Corn silage had the highest amount of crude protein, non-fibrous carbohydrates, total digestible nutrients, digestible energy, metabolizable energy, net energy lactation, crude fat, and the lowest amount of ash, acidity, the insoluble fiber in acid detergent and insoluble fiber in neutral detergent. This is followed by Pegah cultivar with a slight difference. It seems that the Pegah cultivar due to higher fodder yield, same silage quality as corn, more tolerance to drought, salinity, and heat than corn, and considerably less water requirement is a suitable alternative for corn in many salinity and water-scarce regions of Iran. پرونده مقاله

In Vitro Callogenesis and Regeneration of Cucumber Plants from Hypocotyl and Cotyledon Abouzar Asadi1* 1- Assistant Professor, Plant Improvement and Seed Production Center and Department of Plant Genetic and Production Engineering, Azad University, Isfahan, Iran. *Corresponding email address: asadi.abzr@gmail.com Received: 5 November October 2022 Accepted: 18 January 2023 Abstract In vitro culturing of cotyledon and hypocotyl can serve various purposes such as gene transfer and asexual reproduction. This study aimed to regenerate plants from cotyledon and hypocotyl explants of cucumber cultivars, the Iranian landrace Isfahan and Beta Alpha F1 hybrid. The experiment was carried out in the tissue culture laboratory of Azad University of Isfahan in 2023. It employed a factorial completely randomized design with two genotypes and 10 media in the three replicate dishes. The media consisted of MS supplemented with BAP (1, 2, 3, and 4 mg/l) combined with NAA (0.05, 0.1, 0.2, and 0.5 mg/l). The results showed that callus was successfully induced in both cotyledon and hypocotyl explants in both genotypes. The highest percentages of regeneration from cotyledons were observed in 3 mg/l BAP and 0.5 mg/l NAA and 4 mg/l BAP and 0.1 mg/l NAA, with 65% and 60%, respectively, for the Isfahan genotype and in 1 mg/l BAP and 0.2 mg/l NAA and 1 mg/l BAP and 0.5 mg/l NAA, both exhibiting a 60% regeneration rate for Beta Alpha. Furthermore, when Isfahani and Beta-alpha’s hypocotyl explants were cultured in MS supplemented with 2 mg/l BAP and 0.1 mg/l NAA, and 1 mg/L BAP and 0.2 mg/L NAA had 30% and 55% rate of regeneration, respectively. The present findings indicate that induced callus or shoot regeneration depended on genotype and explants. Each genotype requires specific callogenesis and regenerated media to achieve desirable results. Overall, the results suggest that cotyledons in the Isfahan genotype and hypocotyls in the Beta-alpha variety exhibited better regeneration when tested with these plant growth regulators. پرونده مقاله