Rahim Barzegar; Sadollah Hooshmand; Gholamali Peyvast
Abstract
In order to evaluation of squash (Cucurbita pepo) seed yield per fruit and its relations with other characteristics of fruit include: length, diameter, length: diameter ratio (fruit shape), flesh thickness, thousand seed weight and fruit weight, an experiment was conducted using 24 accessions of squash ...
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In order to evaluation of squash (Cucurbita pepo) seed yield per fruit and its relations with other characteristics of fruit include: length, diameter, length: diameter ratio (fruit shape), flesh thickness, thousand seed weight and fruit weight, an experiment was conducted using 24 accessions of squash as a randomized complete-block design with three replications. Morphological traits were evaluated according to UPOV descriptor and UPGMA clustering algorithm clustered the accessions in 4 groups (predominantly on the basis of fruit shape). Correlation, regression and path analysis were done for mentioned characteristics in 4 type-fruit groups. There was negative correlation between seed yield of individual fruit and its length and fruit length: diameter ratio. But fruit weight, fruit diameter, and thousand seeds weight had positive correlation with seed yield. Seed weight: fruit weight ratio had negative relationship with fruit weight. Therefore small size fruit is more suitable for seed yield per area. Path analysis was showed fruit weight had the most positive direct effect on seed yield per fruit in all groups.
Jamal-Ali Olfati; Gholamali Peyvast; Habibolhah Samizadeh; Babak Rabie; Seyyed Akbar Khodaparast
Abstract
Partial diallel design can be used to investigate the general and specific combining ability, and heterosis. Combining ability and heterosis were studied in a 6×6 partial diallel cross to see the nature of gene action for fruit quality indices in cucumber (Cucumis sativus L.) during 2007 to 2009. Analysis ...
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Partial diallel design can be used to investigate the general and specific combining ability, and heterosis. Combining ability and heterosis were studied in a 6×6 partial diallel cross to see the nature of gene action for fruit quality indices in cucumber (Cucumis sativus L.) during 2007 to 2009. Analysis of variance revealed highly significant differences among all the F1 hybrid means and their respective six parental values for all the traits examined. The mean squares of general combining ability (GCA) and specific combining ability (SCA) were also highly significant. SCA genetic variances were greater than GCA and more important for the seedcell size, showing the additive and non-additive gene action. Fruit color was controlled by additive type of gene action due to high GCA variances. Fruit shape and overall performance were controlled additively and non-additively due to high general combining ability. Line 605 and 118 were found to be the best general combiner and its utilization produced valuable hybrids with desirable SCA F1 hybrids.
Soheila Kamari; Gholamali Peyvast; Mahmood Ghasemnejad
Abstract
Humic acid, which has hormone- like activity , not only enhances plant growth and nutrients uptake but also improve stress tolerance. To determine the effect of humic acid on the yield and vegetative characteristics of tomato an experiment was conducted with tomato cv. `Isabela` in 2008 in a plastic ...
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Humic acid, which has hormone- like activity , not only enhances plant growth and nutrients uptake but also improve stress tolerance. To determine the effect of humic acid on the yield and vegetative characteristics of tomato an experiment was conducted with tomato cv. `Isabela` in 2008 in a plastic tunnel at the Agriculture Faculty, Guilan University using randomized completely design with four treatments (0, 1, 2, 3 mg l-1 humic acid) and three replications. Humic acid was sprayed four times during the vegetation period with 10- day intervals after three weeks of planting. Results showed that humic acid could affect significantly (P
Soheila Kamari; Gholam Ali Peyvast; Jamal Ali Olfati
Abstract
Abstract
Beneficial effects of humic substances on plant growth have been recognized by many researchers. A greenhouse experiment was conducted with humic acid (0, 20 and 50 mg/l) on lettuce cultivars ‘Lollorossa’ and ‘Javelina’ using completely randomized design at university of Guilan. Results ...
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Abstract
Beneficial effects of humic substances on plant growth have been recognized by many researchers. A greenhouse experiment was conducted with humic acid (0, 20 and 50 mg/l) on lettuce cultivars ‘Lollorossa’ and ‘Javelina’ using completely randomized design at university of Guilan. Results showed that humic acid affected (P
Mohammad Ahmadi Dahaj; Mahmood Ghasemnejad; Mohsen Zavareh; Gholam Ali Peyvast
Abstract
Abstract
Many preharvest and postharvest factors and conditions influence the nutritional value and storage life of horticultural commodities. The present study, the response of tomato fruits produced from different growing media, tea waste, tea waste + zeolite (1:1), tea waste + zeolite (3:1), tea ...
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Abstract
Many preharvest and postharvest factors and conditions influence the nutritional value and storage life of horticultural commodities. The present study, the response of tomato fruits produced from different growing media, tea waste, tea waste + zeolite (1:1), tea waste + zeolite (3:1), tea waste + zeolite (1:3), zeolite + perlite (1:2) (V/V) in soilless culture to two different storage temperature were investigated. The results showed that keeping quality of fruits such as antioxidant capacity and total phenolic compounds affected by storage temperature. The response to storage temperature was different among the fruits that produced on different growing media. Fruits weight loss was affected by storage temperature and growing media could not change it. The declining antioxidant capacity and phenolic losses were accelerated at higher temperatures (20°C) and longer storage durations. Fruits produced on tea waste have been showed the highest antioxidant capacity and phenolic compounds after two weeks storage.
Keywords: Tomato, Soilless culture, Quality & antioxidant capacity
Yaghub Mami; Gholamali Peyvast; Davoud Bakhshi; Habibollah Samizadeh
Abstract
Abstract
This study was performed in order to determine a suitable alternative substrate for peat in soilless culture in 2007. Different plant wastes including carbonized rice hull, saw dust and dry pine leaves (Pinus eldarica) were examined. Treatments were 100% peat as control, peat plus dry pine ...
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Abstract
This study was performed in order to determine a suitable alternative substrate for peat in soilless culture in 2007. Different plant wastes including carbonized rice hull, saw dust and dry pine leaves (Pinus eldarica) were examined. Treatments were 100% peat as control, peat plus dry pine leaves (1:1 v/v), peat plus carbonized rice hull (1:1 v/v) and peat plus saw dust (1:1 v/v). The study was conducted in the pot and tube culture system in the research Greenhouse of the College OF Agriculture, Guilan University. The results showed that the peat plus carbonized rice hull was the best one as FOLLOWS: the average total yield of Was 8.7 kg m-2; the marketable yield was 7.3 kg m-2; AND the most fruit set WAS 6.1 per plant and 70.6 of fruit per m-2. The highest total soluble solids (TSS) content WAS 4.2o Brix; also, Potassium content 400, Phosphorous 21.6, Calcium 13.3 and Magnesium 16.6 mg kg-1 were obtained from this substrate. Fruits and THE NUMBER OF LEAVES and magnesium content were higher at 1% and the other differences were obtained at 5%. Peat with the average of 38.6 cm had the most distance of the first inflorescence from substrate surface level, which was significantly higher than peat plus saw dust at level of 5%. There was no significant difference among the other characteristics. According to these results, mixed carbonized rice hull and peat (1:1 v/v) can be used as peat substitution in soilless culture substrates for tomato production.
Key word: Tomato, Peat, plant waste, soilless culture
