Atefeh Beilari; Jamal-Ali Olfati; Masood Esfahani; Nader Pirmoradian
Abstract
This study aims at evaluating the yield of cucumber genotypes in two seasons, and identifying cucumber genotypes with high yield and stability. The research has been carried out in the greenhouse of the Department of Horticultural Sciences, University of Guilan, as a factorial experiment in a completely ...
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This study aims at evaluating the yield of cucumber genotypes in two seasons, and identifying cucumber genotypes with high yield and stability. The research has been carried out in the greenhouse of the Department of Horticultural Sciences, University of Guilan, as a factorial experiment in a completely randomized design in autumn and spring seasons with nine cucumber genotypes in three replications. Results show that in terms of number of female flowers in autumn and spring, genotype C1 with an average of 16.7 per plant and genotype C8 with an average of 7.0 per plant have been the best, respectively. Also, in terms of leaf area, C10 genotype with an average of 2866.6 cm2 in autumn and C8 genotype with an average of 9340.990 cm2 in spring outperform the rest and can be used to achieve suitable hybrids for each growing season. Results of principal components analysis and population biplot show that C8 genotype is a suitable genotype for cultivation in two cropping seasons in terms of stability of yield-related traits and vegetative traits. Finally, in terms of number of fruits, genotype C1 with an average of 5.0 per plant in autumn, and C10 genotype with an average of 5.0 per plant in spring have been superior.
Hatam Hatami; Golamreza Mohsenabadi; Masoud Esfahani; Bahman Amiri garijani; Ali Aalami
Abstract
Dry matter remobilization, grain filling rate and duration has principle role on rice grain yield, and environment condition directly affect on them. For study the influence of climate factors a factorial field experiment in randomized complete blocks design with three replications conducted at Haraz ...
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Dry matter remobilization, grain filling rate and duration has principle role on rice grain yield, and environment condition directly affect on them. For study the influence of climate factors a factorial field experiment in randomized complete blocks design with three replications conducted at Haraz Extention and Technology Development Centre in Spring 2013. Treatments included rice cultivars namely; Samadi, Tarom Hashemi, Local Tarom, Shiroudi, Keshvari, Gohar and transplanting times (5th may, 20th may and 10th June). Results showed that dry matter remobilization rate, stem dry matter remobilization efficiency, grain filling rate and duration, and grain yield varied significantly among different transplanting times. Transplanting time on 5th may was higher than other two transplanting dates in all traits except for grain filling rate. Tarom Hashemi had highest and improved variety, Shiroodi had lowest grain filling rate. Dry matter remobilization rate, Stem dry matter remobilization efficiency, effective grain filling duration, and grain yield was higher in Shiroudi among rice cultivars. Grain yield negatively correlated with grain filling rate. Increasing in grain filling duration with increased dry matter remobilization had more effective role in rice cultivars grain yield. Increasing temperature in vegetative growth phase with increasing in accumulated growing degree day accompanied with decreasing in tiller number, less tiller number caused higher grain filling rate and lower grain filling duration and dry matter remobilization restriction that decreased grain yield.
Farnaz Faraji; Masoud Esfahani; Mohammad Reza Alizadeh; Ali Alami
Abstract
In order to evaluate the morphological characteristics and lodging related traits and carbohydrate content of culm and carbohydrate remobilization in traditional and improved rice cultivars, a field experiment was laid out in randomized complete block design with three replications at Rice Research Institute ...
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In order to evaluate the morphological characteristics and lodging related traits and carbohydrate content of culm and carbohydrate remobilization in traditional and improved rice cultivars, a field experiment was laid out in randomized complete block design with three replications at Rice Research Institute of Iran )Rasht( in 2012 and 2013. Rice genotypes included three native rice cultivars (Hashemi, Sangjo and Alikazemi) and six improved (Kadous, Gohar, Khazar, Sepidrood, Deylam and Dorfak) and three promising lines (831, 841 and 416). On the basis of this results, the greatest amount of breaking resistance were observed in third and fourth internods of Khazar. Furthermore, significant positive correlation were observed between average diameter of internode, fresh weight/length of internode and unsoluble carbohydrate content of culm in anthesis and maturity stages with breaking resistance of third and forth internods. Also, significant positive correlation was observed between number of parenchyma cells and unsoluble carbohydrate content of culm in anthesis and maturity stages. On the other hand, there was significant negative correlation between carbohydrate remobilization and breaking resistance of third and forth internods. Principal component analysis classified plant characteristics to two groups. The first factor was named as lodgigng resistance factor and included 71.01 percent of total variation. The second factor with 19.74 percent of total variation was named as morphological lodging sensitivity factor. According to the results of this experiment, it seems that average diameter, thikness and weight/length of internode, have major roles in rice plant resistance to lodging.
Seyyad Mohammad Reza Hashemi; Jafar Asghari; Masood Esfahani; Mohammad Rabiei
Volume 11, Issue 2 , November 2009, , Pages 75-82
Abstract
The effect of harvesting time on seed germination and seedling growth of six rapeseed (Brassica napus L.) cultivars were evaluated in field and laboratory in 2004-05. The experiment was conducted in a complete randomized block design based on split plot layout with four replications. The seeds of rapeseed ...
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The effect of harvesting time on seed germination and seedling growth of six rapeseed (Brassica napus L.) cultivars were evaluated in field and laboratory in 2004-05. The experiment was conducted in a complete randomized block design based on split plot layout with four replications. The seeds of rapeseed cultivars were harvested based on grain moisture content of the siliques of one third of the bottom main stem; 1) 40% and higher, 2) 30- 40% and 3) 20-30%. Standard germination test was conducted in a complete randomized block design based on split plot layout with three replications. Germinated seeds were counted daily for 7 days and germination indices were measured. Total germination, vigor index, germination index, germination rate, energy of germination and mean germination time were significantly different in harvesting times. All seed germination and seedling growth indices were higher in the third harvest and Hyola401 performed better germination indices.