Mahtab Noori; Farangis Ghanavati; Gholam Reza Bakhshi khaniki; Hamid Sobhanian; Hamid Reza Fanay
Abstract
Objective: In order to investigate the effect of irrigation intervals, 15 selected Okra genotypes from the National Gene Bank of Iran were cultivated and evaluated in a randomized complete block design with three replications in the 2020-2021 crop year in the experimental research farm of the Seedling ...
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Objective: In order to investigate the effect of irrigation intervals, 15 selected Okra genotypes from the National Gene Bank of Iran were cultivated and evaluated in a randomized complete block design with three replications in the 2020-2021 crop year in the experimental research farm of the Seedling and Seed Breeding Research Institute in Karaj (Seed and Plant Improvement Institute).Methods: After the plants entered the three-leaf stage, irrigation was done once every 5 and 10 days.Results: The results of the analysis of variance showed that the effect of drought stress on all measured traits, including plant height, fruit yield, biological yield, number of ripe fruits, weight of ripe fruit, diameter of ripe fruit, number of seeds per ripe fruit, 1000-seed weight, sugar, and protein content, was statistically significant. Under drought-stress conditions, the mean of all evaluated traits (except soluble sugars) was reduced. The highest fruit yield (12.06 tons per hectare) belonged to genotype 10, which decreased by 37.5% compared to the non-stress conditions of this genotype. Genotypes 1 and 12 had the least change in protein content, genotypes 4 and 6 had the least change in sugar content, and genotypes 9 and 11 had the least change in biological function. Conclusion: Based on the results obtained from this experiment, the best genotype in terms of fruit yield was genotype 10, and in terms of biological function, genotypes 9 and 11 were recommended for use in areas with water shortages.
Hamid Jabbari; Hamid Reza Fanaei; Farnaz Shariati; Hamid Sadeghi Garmarodi; Mohamad Abasali; Amir Hasan Omidi
Abstract
This study evaluates the genetic diversity of 122 safflower genotypes from the institute of plant genetics and crop plant research (IPK) and International Maize and Wheat Improvement Center (CIMMYT). It compares their agronomic characteristics with five Iranian Safflower cultivars. Conducted at research ...
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This study evaluates the genetic diversity of 122 safflower genotypes from the institute of plant genetics and crop plant research (IPK) and International Maize and Wheat Improvement Center (CIMMYT). It compares their agronomic characteristics with five Iranian Safflower cultivars. Conducted at research field of Seed and Plant Improvement Research Institute in Karaj between 2017 and 2018, the experiment uses an Augmented with randomized complete block design. Results indicate high genetic variation in the germplasm. Among safflower genotypes, thirty-six genotypes without thistle, eighty-one genotypes with thorns, and ten genotypes with few thistle have been observed. Principal component analysis helps identifying three main components that account for 56.5% of the total variations. The first and second components account for 29.5% and 15.9% of the total variation, respectively. These are named as a yield components and phenology and plant architecture, respectively. Safflower genotypes are divided into four groups by principal components analysis (PCA). Genotypes in the first groups have the higher grain yield than others. Genotype No. 70 with the highest grain yield (5667 kg.ha-1) is placed in this group. Numerical values of yield components such as 1000-seed weight, number of heads, and number of seeds per plant in the third group stand higher than other groups. Generally, German genotype No. 70 with high yield and genotype No. 45 with early flowering can be used in safflower breeding programs.