We studied five parental forms of tomato (Solanum Lycopersicum L.). Were obtained twenty F 1 hybrids by the complete diallel scheme (5×5) and used to study inheritance of the average weight of the fruit. Were used as parental forms in the system of diallel crosses according to Hayman V. I. and Jinks I. J.: the line №477 (sp, u), variety Alya (sp) and three collection samples with high lycopene content in fruits: Dark green (hp -2 dg ), MO 112 (hp) and T-3627 (B c ). The results of the evaluation are given of the general and specific combining ability of the five parental forms of tomato of the average weight of the fruit, established the character of inheritance. In the course of research it was found that the average weight of the fruit is controlled by the additive-dominant genetic system. Inheritance occurs by type of incomplete dominance. The main role in the genetic control of the trait is played by the additive effects of genes, which allows for selection, starting with the second hybrid generation. The direction of dominance varies from the dominance of genes that reduce the manifestation of the trait to its absence. The highest reliable effects of general combining ability (GCA) had the variety Alya, which must be used to create heterosis hybrids. From hybrid combinations with his participation in the future it is possible to make selections for creation of varieties.
Purpose. To indentify the best shallot cultivars and local forms by growing period length, bulb yield, leaf productivity, and bulb weight and number per clump in the Right-Bank Forest-Steppe of Ukraine. Methods. Statistical processing, field assessments, computational and analytical methods. Results. Collection shallot accessions were evaluated for growing period lengthand, bulb weight, number and performance. Earlyripening accession ‘Sh-8’ with a vegetation period of 74 days was selected. Local form ‘Sh-1’ from the Kyivska Oblast region turned out to be the best in terms of the mean bulb weight per clump (26.7 g). Accessions from Kyivska (‘Sh-1’, ‘Sh-2’), Dnipropetrovska (‘Sh-6’, ‘Sh-9’), and Chernihivska (‘Sh-10’) Oblasts yielded the most (30.5, 25.4, 18.9, 18.1, and 19.4 t/ha, respectively). The check cultivar, ‘Lira’, yielded 15.5 t/ha. The smallest yields were harvested from the following accessions: ‘Sh-4’ (12.2 t/ha), ‘Sh-7’ (12.0 t/ha), ‘Sh-11’ (11.9 t/ha), ‘Sh-12’ (13.8 t/ha ha), ‘Sh-13 (13.2 t/ha), and ‘Sh-14’ (13.0 t/ha). Two accessions, which came from the Kyivska (‘Sh-3)’ and Dnipropetrovska (‘Sh-6’) Oblasts were found to be best adapted to the environmental conditions of the Right-Bank Forest-Steppe of Ukraine. Their Lewis’s phenotypic stability factors were close to 1. A local form from the Dnipropetrovska Oblast, ‘Sh 9’ was the worst adapted accessions, as its Lewis’s phenotypic stability factor was as high as 1.2. The maximum leaf length was recorded for accessions from the Kyivska (‘Sh-1’, ‘Sh-2’; 38.0 and 35.8 cm, respectively) and Chernihivska (‘Sh-10’; 36.2 cm) Oblasts. Conclusions. Due to this study, shallot accessions with short growing periods, great weights and numbers of bulbs and yield were selected for the conditions in the Right-Bank Forest-Steppe of Ukraine. ‘Sh-1’ sample originating from the Kyivska Oblast showed the best results in terms of the bulb weight (26.7 g) and yield (30.5 t/ha). However, it turned out to be late-ripening (86 days), and only formed on average 4 bulbs per clump. The maximum leaf length was 38 cm was. ‘Sh-8’, a local form from the Dnipropetrovska Oblast, was the most early-ripening (74 days).
Potted citrus plants are in constant demand, but the propagation of such plants requires the use of a winter greenhouse and several well-developed mother plants to obtain planting material. The use of microclonal propagation can accelerate the production of seed material though it requires detailed development of in vitro cultivation techniques. The aim of the research was to study the effectiveness of sterilizing substances and methods of sterilization on the yield of viable micro shoots of lime plants (Citrus aurantifolia) as well as Meyer and Jubilee lemon varieties and their growth in vitro. The research was conducted in the interdepartmental "Biotechnological Laboratory" of the Agrobiotechnological Faculty of Bila Tserkva NAU. The source material was microshoots from lime plants (Citrus aurantifolia), and lemon varieties (Citrus lemon) Meyer and Jubilee. The objects of the study were selected according to the diversity of genotypes, development type and varietal characteristics. The possibility of using different parts of plants for reproduction is a feature of in vitro culture. We used microshoots with a bud in our research. To neutralize the exogenous bacterial and fungal microflora, we used 70 % ethanol solution C2 H5 OH, sodium hypochlorite 5 %, 15 % solution of hydrogen peroxide H2 O2 , sulema (0.1) and washed the material in sterile water (for 5–10 min) under several schemes. The study revealed the influence of different sterilization regimes for obtaining sterile explants and the introduction into plant culture of explants of the species of lime Citrus aurantifolia as well as Meyer and Jubilee lemon varieties. It was found that the use of step sterilization using 2.5 % solutions of sodium hypochlorite gives a high percentage of sterile viable material – 27.7 %, which is significantly higher than in other variants of the experiment. Key words: microshoots, lime, sterile material, micropropagation, sterilization, hydrogen peroxide, viability of explants.
The influence of weather conditions on vegetable crops plays an important role in the cucumber production. The biggest amount of cultivated fields is situated in the areas that are under risk for agriculture. Our research aim is to study different cucumber heterozygous hybrid varieties. Their chemical composition, crop formation, growing season, stem thickness near the root collar, main stem length, leaf area, leaf number per plant are of great importance to form clusters, the samples of which could give the highest cucumber productivity under Ukraine Right-Bank Forest-Steppe conditions. The samples of 36 cucumber heterozygous hybrid varieties of Ukrainian and foreign breeding (Russian, Italian, French) have been studied at Bila Tserkva National Agrarian University Training and Production Center. The variety estimation of 36 heterozygous samples shows that they have 17 traits. It has allowed us to subdivide them into five clusters at the lowest level under Ukraine Right-Bank Forest-Steppe conditions. In the plant nursery, all cucumber varieties are presented by six the most common hybrid samples. There are three samples that have been bred in Ukraine (Suvenir F1, Lyaluk F1, Vodogray F1), 1 in Poland (Sremski F1) and 2 in The Netherlands (Masha F1, Crispina F1).
<p> Five parental forms of tomato (Solanum lycopersicum L.) and twenty hybrids F1, were studied which were obtained by the complete diallel scheme (5 x 5). For genetic analysis (by Hayman, 1954; Jinks,1954) was used line №477 (sp,u), variety Alya (sp) with reduced duration of vegetation period and three collection samples with the high lycopene content in fruits: Dark Green (hp-2dg), МО 112 (hp), Т˗3627 (Bc). The effects of the general (GCA) and specific combining ability (SCA) of the duration of vegetation period were determined and established character of inheritance. According to the results of research, the duration of vegetation period is controlled by additive-dominant genetic system. Inheritance occurs by type of over dominance, and in dry and hot summers which led to the prolongation of the duration of vegetation period, there is a tendency to incomplete dominance, but it is apocryphal. In genetic control a major role play non-additive effects of genes. The best reliable effects of the general combining ability (GCA) had line №477 and variety Alya. They can be recommended for the creation of heterotic hybrids and varieties.</p>
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