alireza khodashenas
Abstract
In order to evaluate grain yield of wheat cultivars in two planting dates and determination of proper cultivars for autumn and entezari culture, a study is carried out during two years, between 2015 and 2017 in Torogh research station in Mashhad. Two planting dates of autumn and entezari culture are ...
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In order to evaluate grain yield of wheat cultivars in two planting dates and determination of proper cultivars for autumn and entezari culture, a study is carried out during two years, between 2015 and 2017 in Torogh research station in Mashhad. Two planting dates of autumn and entezari culture are the main plot and 16 genotypes of wheat (14 cultivars and 2 promising lines), including Baran, Rasad, Sardari, Sabalan, Crosssabalan, Rijav, Karim, Koohdasht, Dehdasht, Azar2, Homa, Ohadi, Ghaboos, and Aftab cultivars are the subplot. Results show that significant difference exist between cultivars in terms of agronomic characteristics and grain yield. Flowering date of cultivars differ and no cultivar start flowering in the optimum temperature range for flowering. Cultivars of Karim and Rijav with mean yield of 1430 and 1326 kg/ha, respectively, have had the maximum yield and cultivars of Ohadi and Rasad with mean yield of 893 and 925 kg/ha, respectively, the minimum. The difference between maximum and minimum grain yield is about 60%. Delay in planting leads to delay in pollination in all cultivars; therefore, autumn planting date could be recommended. Also for autumn planting, cultivars of Karim and Rijav can be advised and for entezari planting date only spring cultivars such as Karim and Aftab are recommended.
Gholamhasan Movahed; Nهئش Ahmadi; Ahmad Moieni; Amin Nasiri
Abstract
In order to evaluate self and cross-incompatibility in two ecotypes of Damask rose (Rosa damascena Mill.), this experiment was performed based on randomized complete block design (RCBD) with four replications at the research field of Tarbiat Modares University in 2012-2013. In this ...
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In order to evaluate self and cross-incompatibility in two ecotypes of Damask rose (Rosa damascena Mill.), this experiment was performed based on randomized complete block design (RCBD) with four replications at the research field of Tarbiat Modares University in 2012-2013. In this experiment, twice pollinations were performed 24-hour interval, after doing in vitro testing pollen grain germination. Pollens collected from Kashan and Azaran ecotypes and Dog rose (Rosa canina) were applied as pollinizer for self- and cross-artificial pollination on both ecotypes. Determination of self and cross incompatibility were conducted with two methods of field controlled pollination and microscopic studies. Results obtained from percentage of hip development, hip weight and length, as well as seed production per hip showed that cross pollination with Dog rose pollen had the highest compatibility, comparing to pollen of Kashan and Azaran ecotypes that showed incompatibility. Also, twice pollinations had better result in comparison to one-time pollination. Field results were supported by microscopic studies based on growing pollen tube in style. According to growing pollen tube in style, just pollen tube of Dog rose could get to end of style. The concentration of acid boric (50 mg/kg) showed the highest pollen germination after 24 h, while 200 mg/kg acid boric increased pollen tube growth. According to the present results, selection of suitable pollinizer and repetition of pollination were important factors affecting Damask rose crossing, as twice controlled cross pollination by Dog rose pollen had most appropriate results on hip characteristics.
Mohammad Kamalpouradib; Vahid Rouhi; Saadollah Houshmand; Abdolrahman Mohammadkhani; Hamid Zargari
Abstract
Pollen storage could facilitate the date palm hand pollination through saving time and space. The main concern is maintaining pollen viability, which is greatly cultivar dependent and is influenced by storage condition. In this study, to address this issue, the effects of cultivar, storage ...
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Pollen storage could facilitate the date palm hand pollination through saving time and space. The main concern is maintaining pollen viability, which is greatly cultivar dependent and is influenced by storage condition. In this study, to address this issue, the effects of cultivar, storage temperature, and time on pollen germination were investigated. A factorial experiment was laid out in a completely randomized design with three replicates using four cultivars ‘Kazeroon (7013)’, ‘Lar (7035)’, ‘Darab (7016)’ and ‘Qyr-va Karzin (7021)’, four storage temperatures (RT (20 ± 5), 4, -20 and -80°C) and six storage periods (60, 120, 150, 180, 210 and 375 days). Anova of data showed significant effects of variety, storage temperature, storage time and their interactions on pollen germination. The pollen germination rate increased with decreasing temperature. When pollens were stored for up to 150 days, the germination rates of all varieties initially increased then decreased. Overall, the optimum temperature for preserving pollen grains of tested cultivars is -80°C and the highest pollen grain longevity is related to ‘Qyr-va Karzin (7021)’ after one year.
Abdollah Khadivi-Khub
Abstract
This investigation was carried out in a commercial orchard in Ashtian city, Markazi province. The effect of N-phenyl-phthalamic acid and nutrition on fruit quantity and quality of plum cv. Maragheh was studied with the aim of increasing yield. The N-phenyl-phthalamic treatments (concentrations, 0, 500 ...
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This investigation was carried out in a commercial orchard in Ashtian city, Markazi province. The effect of N-phenyl-phthalamic acid and nutrition on fruit quantity and quality of plum cv. Maragheh was studied with the aim of increasing yield. The N-phenyl-phthalamic treatments (concentrations, 0, 500 and 1000 mg/l) were performed at full bloom (80 % flowering) on 29 March. Also, nutrition was conducted on 18 May using perfect liquid fertilizer (Plant Green). As a result of this process, the yield amount was increased, when N-phenyl-phthalamic acid 500 and 1000 mg/l treatment were used without fertilization comparison to control. But fruit quality parameters (weight, length, and width) were decreased in comparison to control. However, treatments N-phenyl-phthalamic acid 500 and 1000 mg/l with fertilization not only increased fruit setting but also increased fruit quality characters (weight, length, and width). According to the present results, N-phenyl-phthalamic acid (500-1000 mg/l) along nutrition can be used for the improvement of fruit quantity and quality of plum.