scholarly journals Study of some economically valuable characteristics of genotypes of cotton that was selected by photosynthetic test signs in combination with classical selection methods

2020 ◽  
Vol 2 (1) ◽  
pp. 8-17
Author(s):  
Asliddin T Sadikov
Keyword(s):  
Total Yield ◽  
Selection Methods ◽  
Fiber Yield ◽  
Cotton Genotypes ◽  
Early Ripening

The article discusses the main results of research on the study of 28 cotton genotypes obtained from crossing ecological and geographical distant parental forms based on the principle, a set of economically useful traits. According to the obtained data, introgressive hybrids were characterized by more early ripening, yield and fiber yield in comparison with the zoned Khisor variety, which was used as a standard. It was established that the highest yielding genotypes differed: ALC-86/6 x Dusti-IZ, Cocer-4104 x Sorbon, Cocer-4104 x Ziroatkor-64, Cocer-4104 x Dekhkon, NAD-53 x Ziroatkor-64, NAD-53 x Dusti-IZ, NAD-53 x Dehkon, DP-4025 x Ziroatkor-64, DP-4025 x Dehkon, NAK-99/1 x Ziroatkor-64, which have a total yield of 90.0-100.0 g/plant, and prefrost 64.5-71.3 g/plant, which significantly exceeds the standard Khisor variety (by 45.8-55.8 g/plant and 31.3-38.1 g/plant). The same pattern also manifests itself in the yield of fiber combinations: Cocer-4104 x Sorbon (44.0%), Cocer-4104 x Dehkon (44.0%), NAD-53 x Dusty-IZ (44.0%), Nazilli-84-S x Dehkon (44.0%), AC-4 x Dusti-IZ (43.8%), Nazilli-84-S x Ziroatkor-64 (43.5%) and NAD-53 x Ziroatkor-64 (43.1%), outstand with more significant indicators (by 7.9-8.8%.), relatively to the zoned Khisor cultivar.

scholarly journals Adaptability and Stability of Cotton Genotypes Regarding Fiber Yield and Quality Traits

Crop Science ◽  
2019 ◽  
Vol 59 (2) ◽  
pp. 518-524 ◽  
Author(s):  
Paulo Eduardo Teodoro ◽  
Francisco José Correia Farias ◽  
Luiz Paulo de Carvalho ◽  
Larissa Pereira Ribeiro ◽  
Moysés Nascimento ◽  
...  
Keyword(s):  
Quality Traits ◽  
Yield And Quality ◽  
Fiber Yield ◽  
Cotton Genotypes

scholarly journals Effect of water and resource saving technologies of cotton growing on cotton yield

2021 ◽  
Vol 244 ◽  
pp. 02012
Author(s):  
Sabirjan Isaev ◽  
Sayidjakhon Khasanov ◽  
Yusufboy Ashirov ◽  
Tokhtakhon Karabaeva ◽  
Azim Gofirov
Keyword(s):  
Mineral Fertilizers ◽  
Cotton Yield ◽  
Resource Saving ◽  
Cotton Crop ◽  
Effect Of Water ◽  
Fiber Yield ◽  
Net Profit ◽  
Early Ripening ◽  
Available Resources

In this article, in the conditions of light gray soils of Andijan-37 and Sultan varieties of cotton, before additional application of mineral fertilizers (every 3 years) 6,000 kg of bentonite per hectare is cultivated with Andijan-37 variety of 1,000 seeds weighing 2-3 g/ha, fiber yield 0,7%, increase in cotton yield by 3.0-3.5 q/ha, in the Sultan variety of cotton the weight of 1000 seeds by 5 g, fiber yield by 1.4%, cotton yield by 4.1-4.5 q/ha observed an increase in Due to the early ripening of the cotton crop 7-10 days and its 90-100% compliance with the requirements of the first industrial variety, saving 20-25% of available resources, the net profit per hectare is 150-105-75 kg/ha of mineral fertilizers used in the Sultan variety of cotton. There is information that in comparison with the usual technology fed on norms increased by 192,197 and 553,113 UZS, cotton of Andijan-37 variety increased by 468,048 and 553,148 UZS.

scholarly journals The breeding method and its influence on the intensification of the tomato selection process

2020 ◽  
pp. 43-48
Author(s):  
M. D. Маkоvеi
Keyword(s):  
High Temperature ◽  
Selection Process ◽  
Total Yield ◽  
Vegetation Period ◽  
High Temperature Stress ◽  
Selection Methods ◽  
Breeding Method ◽  
High Productivity ◽  
Temperature Regimes ◽  
Heat Treated

Relevance. The article presents the results of using three different selection methods to obtain new forms of tomato that combine high productivity with resistance to high-temperature stress factor.Methods. Eleven hybrid combinations were used as experimental material. Selections were made starting with the offspring of the F1 generation. Three different methodological approaches were used: 1 – step-by-step alternation of sporophytic-gametophytic selections under high temperature pressure; 2 – only gametophytic selection using heat-treated pollen for pollination; 3 – traditional selections based on a high value of indicators of the studied traits. In each of the variants of the experiment, we studied: the heat resistance of offspring at different stages of ontogenesis – "sporophyte-gametophyte"; the duration of the vegetation period of plants; the fruit formation; the total yield. The offspring of the most stable and productive plants isolated from different hybrid combinations were combined in the populations in each variant of the experiment and a comparative analysis and evaluation of the effectiveness of the methods used was carried out.Results. It is shown that the combination of step-by-step sporophyte-gametophyte selections under the action of high-temperature regimes (43°C and 45°C), at early stages (F1–F3) lead to more stable, productive offspring in F5-F7 both for sporophyte and gametophyte traits, compared to using only gametophyte selections and stronger differences relative to the control variant. The gradual alternation of selections at different stages of ontogenesis also leads to the production of offspring with a shorter period of passage of the phenophases "seedling-flowering" – "floweringmaturation" and a stable manifestation of signs that determine the quality of the fruits. Using only gametophytic selections and traditional methods of selection was less effective than alternating sporophyte-gametophyte ones.Conclusions. The differentiating ability of the selection methods used and their influence on obtaining more resistance and productive genotypes was established. The advantage of the method of step-by-step alternation of sporophyte-gametophyte selections, which led to the production of new lines (118/1, 124/1, 133-11/1, 133-12/1, 134/1, 110/1 and 7/1) with high resistance at different stages of ontogenesis (sporophyte-gametophyte), shorter vegetation period and high fruit-forming capacity in three different years of research (2015-2017).

scholarly journals Plant Spacing and Cultivar Affects Yield Components, Qualitative Traits and Early Ripening of Tomato (Lycopersicon esculentum)

2013 ◽  
Vol 5 (4) ◽  
pp. 494-498 ◽  
Author(s):  
Ebrahim MAMNOIE ◽  
Ali DOLATKHAHI
Keyword(s):  
Lycopersicon Esculentum ◽  
Agricultural Research ◽  
Block Design ◽  
Total Yield ◽  
Fruit Weight ◽  
Plant Spacing ◽  
Randomized Block Design ◽  
Weight Yield ◽  
Early Ripening ◽  
Set Up

Two-year field trial was set up on sandy clay soil in the Jiroft and Kahnouj Agricultural Research Center with the objective to determine the effect of plant spacing and different cultivars on the yield and qualitative characteristics of tomato (Lycopersicon esculentum). This experiment was performed as split plot based on complete randomized block design with 3 replications. The main plots were in – row spacing in 4 levels include 0.3, 0.4, 0.5 and 0.6 m and the subplots were cultivars naming ‘Shef ’, ‘Peto Early CH’ and ‘FDT 202’. The results showed that, fruit length to diameter ratio, total acidity, fruit number per plant, mean fruit weight, yield per plant, total yield and first harvest to total harvests ratio were significantly affected by plant spacing. In addition, cultivars showed significant effect on all traits evaluated (p

scholarly journals ESTIMATION OF FAST-RIPENING SAMPLES OF THE STAMPING VARIETY OF TOMATO IN THE DRY SUBTROPICS CONDITIONS

2018 ◽  
pp. 44-46
Author(s):  
N. J. Nurmatov ◽  
E. A. Jumayev
Keyword(s):  
Total Yield ◽  
Source Material ◽  
Standard Variety ◽  
Valuable Source ◽  
Experimental Station ◽  
Small Fruit ◽  
Short Period ◽  
Early Ripening ◽  
Early Harvest ◽  
Selection Of

The excretion and inculcation of stamped varieties of tomato and hybrids into production are of particular value in conditions of dry subtropics. In this regard, during 2013-2015 in the Surkhandarya Scientific Experimental Station of the Research Institute of Vegetable and Melon Crops and Potatoes, a collection of tomato strains was studied for biological and economic precocity, maturity, etc. For the duration of the «young growthflowering» period, the best were No.86, Yamal, GemState, and Sever. Blooming on the first brush, they come in 8-13 days before the standard variety. The Argo, Chelnyok, Ion-N, Alpatyeva 905а, L-923-92 samples with a duration of 38-40 days have a short period of «flowering-ripening». Maturation of the first fruit (fetus) occurs 1-3 days earlier than the standard. By weight of the fetus, the samples studied can be divided into two groups: medium fruit (61-93 g) – L-923-92, Argo; small fruit (28-58 g) – GemState, Ion-N, Sever, Nevsky, etc., only 10 samples. The total yield varies from 16.4 to 55.5 t/ha, depending on the variety. Samples No.86 and Chelnok are 7.7 and 12.3% higher than the standard for the general harvest. The lowest overall yield is GemState, Ion-N, Sever, Nevsky, Yamal, Argo, L-923-2, with a yield of 16.4-34.1 t/ha, which is 33.2- 69.0% of the standard. The only sample No.86 for the early harvest is 32% higher than the standard. As a result of the study and a comprehensive assessment of tomato stamping varieties, the biologically early ripened ones are Sever, Nevsky, Ion-N, Otradny, GemState, the sprouting-maturing period of which is 95-99 days; economically early ripened – No.86; amity of ripening of samples – Yamal, Sever, Ion-N, Nevsky, Stamped Alpatyeva 905a, GemState, with maturity ripeness from 69 to 90%. They are a valuable source material for selection of stamped, early-ripening, amity of ripening varieties of tomato for dry subtropics conditions of Uzbekistan.

scholarly journals Comparative assessment of cucumber hybrids of semko-junior company by yield in the taiga zone of Omsk region

2021 ◽  
Vol 37 ◽  
pp. 00133
Author(s):  
Alyona Krasovskaya ◽  
Maria Krasovskaya ◽  
Vladimir Kumpan ◽  
Anna Kling
Keyword(s):  
Total Yield ◽  
Control Sample ◽  
Weather Conditions ◽  
Comparative Assessment ◽  
High Yield ◽  
Taiga Zone ◽  
Early Ripening ◽  
Early Production ◽  
Commercial Yield ◽  
High Yields

Comparative assessment of cucumber hybrids of a Semko-Junior farm firm located in a taiga zone of Omsk Region showed that on average over 2 years the cucumber hybrids – F1 Otello and F1 Lastochka – which button stage was noted 2 days earlier in comparison with ultra-early F1 Tviksi and 1 day earlier in comparison with the control sample, were the most early-ripening variety. The longest period of “seedling-button stage” – 46 days – was characteristic of the hybrids F1 Semkross and F1 Kaskader. F1 Otello hybrid gave the highest total (7.53 kg/m2) and commercial yield (7.10 kg/m2), as well as early products yield. On average over 2 years the highest percentage of commercial yield – 93.9 was obtained with F1 Otello hybrid, the lowest – 84.6 – with F1 Semkross hybrid. In 2016, the highest yield – 60.5% of the total amount was harvested with regard to F1 Otello by August 9, more than 50% of the total yield was obtained from F1 Orlenok and F1 Lastochka, which also indicates their early ripening. In 2017, fruiting was later due to weather conditions, and by August 21 F1 Otello gave more than 50% of the yield, which confirmed its early ripening. The highest tasting assessment of buttons in fresh form was obtained for F1 Lastochka and F1 Otello. In the conditions of the taiga zone of Omsk Region, cucumber hybrids of the Semko-Junior farm firm – F1 Otello, as well as F1 Lastochka, which are distinguished by high yields and flavors, are recommended for vegetable growers to ensure early production and high yield.

Fairness reactions to selection methods: A Romanian study

2009 ◽  
Author(s):  
Dan Ispas ◽  
Alexandra Ilie ◽  
Dragos Iliescu
Keyword(s):  
Selection Methods

Study of the Kinetics of Thermal Destruction of Crossed Polyethylene

2019 ◽  
Vol 5 (12) ◽  
pp. 37-46
Author(s):  
K. Chalov ◽  
Yu. Lugovoy ◽  
Yu. Kosivtsov ◽  
E. Sulman
Keyword(s):  
Total Yield ◽  
Calorific Value ◽  
High Heat ◽  
Process Temperature ◽  
Optimum Process ◽  
Quantitative Composition ◽  
Pyrolysis Gas ◽  
Gaseous Products ◽  
Liquid Products ◽  
Kinetics Of

This paper presents a study of the process of thermal degradation of crosslinked polyethylene. The kinetics of polymer decomposition was studied by thermogravimetry. Crosslinked polyethylene showed high heat resistance to temperatures of 400 °C. The temperature range of 430–500 °C was determined for the loss of the bulk of the sample. According to thermogravimetric data, the decomposition process proceeds in a single stage and includes a large number of fracture, cyclization, dehydrogenation, and other reactions. The process of pyrolysis of a crosslinked polymer in a stationary-bed metal reactor was investigated. The influence of the process temperature on the yield of solid, liquid, and gaseous pyrolysis products was investigated. The optimum process temperature was 500 °C. At this temperature, the yield of liquid and gaseous products was 85.0 and 12.5% (mass.), Respectively. Samples of crosslinked polyester decomposed almost completely. The amount of carbon–containing residue was 3.5% by weight of the feedstock. With increasing temperature, the yield of liquid products decreased slightly and the yield of gaseous products increased, but their total yield did not increase. For gaseous products, a qualitative and quantitative composition was determined. The main components of the pyrolysis gas were hydrocarbons C1–C4. The calorific value of pyrolysis gas obtained at a temperature of 500 °C was 17 MJ/m3. Thus, the pyrolysis process can be used to process crosslinked polyethylene wastes to produce liquid hydrocarbons and combustible gases.

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