Ayoub Jafari; MohammadReza Bihamta; Masoumeh Moghbel; Saeid Soufizadeh; Saeed Bazgeer; Mostafa Karimi
Abstract
Objective: To evaluate the effect of planting date on the morphological traits, growth indices and seed corn yield of three varieties, an experiment was carried out in the research farm of University of Tehran in Karaj city in 2019.
Methods: The experiment was conducted as a split-plot design based ...
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Objective: To evaluate the effect of planting date on the morphological traits, growth indices and seed corn yield of three varieties, an experiment was carried out in the research farm of University of Tehran in Karaj city in 2019.
Methods: The experiment was conducted as a split-plot design based on randomized complete blocks with four replications. In this experiment, planting date in 3 levels (May 24, June 21, and July 18) was considered as main plots and variety (early KSC400, medium-early KSC647, and late KSC704) as sub plots.
Results: The results showed the highest yield is related to the second planting date (11.98 ton/Kg-1), and the longest period until the appearance of the the tassel was belonged to the first planting date (63.7 days).
The third (129/7 days), the second (122/3 days) and first planting date (113/3 days) had the longest period of physiological maturity, respectively. Also, KSC704 had the highest plant height and stem diameter, and KSC647 had the highest number of leaves. Also, the maximum leaf area, the growth rate of crop in the flowering stage was related to the cultivar KSC704 on the second and third planting date, respectively, and the maximum relative growth rate and the net absorption rate in the first vegetative stages were related to the cultivar KSC704 on the third planting date and the second planting date.
Conclusion: Overall, the second planting date and KSC704 variety are suggested as the suitable date and variety for Karaj city.
Amin Arjmand; Mohsen Ebrahimi; MohammadReza Bihamta; Narges Moradi
Abstract
Objective: Marshmallow (Althaea spp.) is a plant belonging to the Malvaceae family and is native to Asia, South Africa, and America. It is found in Iranian natural pastures throughout the country. The purpose of this research is to identify the best ecotypes of Golkhtami in terms of phytochemical traits ...
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Objective: Marshmallow (Althaea spp.) is a plant belonging to the Malvaceae family and is native to Asia, South Africa, and America. It is found in Iranian natural pastures throughout the country. The purpose of this research is to identify the best ecotypes of Golkhtami in terms of phytochemical traits studied in this experiment and to introduce the best ecotypes for further research and to be used as crossbreeding parents in crossbreeding projects.
Methods: In this study which was investigated in nine ecotypes and three different species, phytochemical traits including total flavonoid content, total anthocyanin content, tyrosinase enzyme inhibitory activity, and cholinesterase inhibitory activity were evaluated in different ecotypes of marshmallow.
Results: The results showed that the Kermanshah ecotype of Althaea officinalis had the highest amount of flavonoids (18.47 mg of quercetin per gram of extract) and cholinesterase inhibitory activity (28.37 mg/ml based on IC50), while the Bushehr ecotype of A. ficifolia had the highest amount of anthocyanins (6.45 mg) and the Yazd ecotype of A. officinalis had the highest tyrosinase enzyme inhibitory activity (84.25 mg/ml based on IC50). Pearson's correlation coefficients revealed a positive and significant correlation between the investigated traits. In orthogonal comparisons, the Kermanshah, Mazandaran, and Isfahan ecotypes of A. officinalis had the highest levels of flavonoids and cholinesterase inhibitory activity. Cluster analysis by the WARD method showed that the ecotypes related to one species were placed in one group.
Conclusion: These findings suggest that the studied species and ecotypes have high diversity, which can be useful for improvement and selection of phytochemical traits in marshmallow. The investigated ecotypes can be used as the base population and initial parents of the cross in further experiments.
Mohsen Ebrahimi; Mohammad Golbashi; MohammadReza Bihamta; Abdolhadi Hossein zadeh; Manijeh Khiyalparast
Volume 13, Issue 2 , March 2012, , Pages 27-40
Abstract
To study the phenotypic and genotypic diversity of some important agronomic traits associated with yield in white beans, 30 genotypes of white bean were evaluated using a randomized complete block design with four replications in two environments under water stress and non stress conditions. Analysis ...
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To study the phenotypic and genotypic diversity of some important agronomic traits associated with yield in white beans, 30 genotypes of white bean were evaluated using a randomized complete block design with four replications in two environments under water stress and non stress conditions. Analysis of variance for most of the traits showed significant differences among genotypes, indicating the existence of genetic variation among varieties. Most traits were affected by the stress. The results indicated that grain yield, weight of pod, biological yield, number of grain per plant and number of pod per plant in white bean reduced under water stress condition whereas, evaluation of drought resistance in bean genotypes, showed that stress tolerance index (STI) and mean productivity (MP) and geometric mean productivity (GMP) were the best criteria for recognizing tolerant genotypes (21 and 30). Under both condition weight of pod was highly correlated with the grain yield. Factor analysis was performed for genotypes both under water stress and non stress conditions and under both conditions three common factor have been extracted, which described most of traits variations. Stepwise regression analysis showed that in water stress conditions, pod weight, harvest index, 100 grain weight and number of grain per plant and in non stress conditions pod weight, harvest index and biological yield have the highest effect on grain yield. Result of path analysis showed that the highest direct positive effect was related to weight of pod under both condition. In classification of genotypes based on phenotypic characteristics, using cluster analysis (UPGMA), all genotypes classification into three separate groups under non stress and stress condition.