scholarly journals Production of New F1 Hybrids Cucumber (Cucumis sativus, L.) in Open Field

2020 ◽  
Vol 11 (2) ◽  
pp. 105-111
Author(s):  
Gehan Mohamed
Keyword(s):  
Cucumis Sativus ◽  
Open Field ◽  
F1 Hybrids ◽  
Cucumis Sativus L

Influence of fruit load per vine on seed quality in cucumber (Cucumis sativus L) grown under open field and protected environments

2021 ◽  
Vol 78 (1) ◽  
pp. 93-100
Author(s):  
Nakul Gupta ◽  
Sudhir Kumar Jain ◽  
Bhoopal Singh Tomar ◽  
Anjali Anand ◽  
Jogendra Singh ◽  
...  
Keyword(s):  
Cucumis Sativus ◽  
Open Field ◽  
Seed Quality ◽  
Cucumis Sativus L ◽  
Fruit Load

scholarly journals Inheritance of gynoecism in cucumber (Cucumis sativus L.) using genotype GBS-1 as gynoecious parent

Genetika ◽  
2015 ◽  
Vol 47 (1) ◽  
pp. 349-356 ◽  
Author(s):  
Kalidas Pati ◽  
Das Munshi ◽  
Kanti Behera
Keyword(s):  
Cucumis Sativus ◽  
Sex Expression ◽  
F1 Hybrids ◽  
Inheritance Pattern ◽  
Cucumis Sativus L ◽  
F2 Population ◽  
Monoecious Plant ◽  
Parental Lines ◽  
F2 Generation ◽  
Plant Sex

The inheritance pattern of gynoecious sex expression in cucumber was studied by utilizing a gynoecious line (GBS-1) and two monoecious lines (Pusa Uday and Punjab Naveen). Crosses were made between gynoecious line (GBS-1) and monoecious lines (Pusa Uday and Punjab Naveen). The F1 and F2 population along with parental lines were evaluated to study the inheritance of this trait. All F1 hybrids showed gynoecious sex in both crosses and in the F2 generation, the observed distribution of plant phenotypes fitted the expected mendelian ratio of 3 (gynocious plant) : 1 (monoecious plant). The segregation of plant sex types suggested monogenic dominant control of gynoecious sex form in cucumber using genotype GBS-1.

scholarly journals Genetic Diversity Assessment and Cultivar Identification of Cucumber (Cucumis sativus L.) Using the Fluidigm Single Nucleotide Polymorphism Assay

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 395
Author(s):  
Girim Park ◽  
Yunseo Choi ◽  
Jin-Kee Jung ◽  
Eun-Jo Shim ◽  
Min-young Kang ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Cucumis Sativus ◽  
Cultivar Identification ◽  
F1 Hybrids ◽  
Single Nucleotide Polymorphism Assay ◽  
Cucumis Sativus L ◽  
Single Nucleotide ◽  
Cultivar Groups ◽  
Population Structure Analysis ◽  
Diversity Assessment

Genetic diversity analysis and cultivar identification were performed using a core set of single nucleotide polymorphisms (SNPs) in cucumber (Cucumis sativus L.). For the genetic diversity study, 280 cucumber accessions collected from four continents (Asia, Europe, America, and Africa) by the National Agrobiodiversity Center of the Rural Development Administration in South Korea and 20 Korean commercial F1 hybrids were genotyped using 151 Fluidigm SNP assay sets. The heterozygosity of the SNP loci per accession ranged from 4.76 to 82.76%, with an average of 32.1%. Population genetics analysis was performed using population structure analysis and hierarchical clustering (HC), which indicated that these accessions were classified mainly into four subpopulations or clusters according to their geographical origins. The subpopulations for Asian and European accessions were clearly distinguished from each other (FST value = 0.47), while the subpopulations for Korean F1 hybrids and Asian accessions were closely related (FST = 0.34). The highest differentiation was observed between American and European accessions (FST = 0.41). Nei’s genetic distance among the 280 accessions was 0.414 on average. In addition, 95 commercial F1 hybrids of three cultivar groups (Baekdadagi-, Gasi-, and Nakhap-types) were genotyped using 82 Fluidigm SNP assay sets for cultivar identification. These 82 SNPs differentiated all cultivars, except seven. The heterozygosity of the SNP loci per cultivar ranged from 12.20 to 69.14%, with an average of 34.2%. Principal component analysis and HC demonstrated that most cultivars were clustered based on their cultivar groups. The Baekdadagi- and Gasi-types were clearly distinguished, while the Nakhap-type was closely related to the Baekdadagi-type. Our results obtained using core Fluidigm SNP assay sets provide useful information for germplasm assessment and cultivar identification, which are essential for breeding and intellectual right protection in cucumber.

scholarly journals Efficacy of fungicides in management of Downy mildew disease of Cucumber (Cucumis sativus L.) under open field conditions, in Dhading district of Nepal

2020 ◽  
Vol 3 (1) ◽  
pp. 240-252
Author(s):  
Shailesh Pandit ◽  
Hira Kaji Manandhar ◽  
Krishna Hari Dhakal ◽  
Sramika Rijal ◽  
Sandesh Bhandari ◽  
...  
Keyword(s):  
Downy Mildew ◽  
Cucumis Sativus ◽  
Open Field ◽  
Disease Incidence ◽  
Block Design ◽  
Trichoderma Viride ◽  
Field Conditions ◽  
Verticillium Lecanii ◽  
Cucumis Sativus L ◽  
Downy Mildew Disease

Downy mildew (Pseudoperonospora cubensis) is one of the most important disease of cucumber under open field conditions. Hence, the experiment was conducted to study the efficacy of fungicides in management of downy mildew disease of cucumber (Cucumis sativus L.) under open field in Chauradi-7 Dhading during spring season, 2019. Bhaktapur local variety of cucumber was used for the study. The experiment was laid out in single factor randomized complete block design with four replications. Three different bio-fungicides; Trichoderma viride + Trichoderma harzianum, Bacillus subtilis, Verticillium lecanii and one chemical fungicide; Krilaxyl (metalaxyl 8% + mancozeb 64%) were used as treatments. Normal water spray served as control. It was observed that bio-fungicides had insignificant effect in controlling the downy mildew. Pathological observation such as disease incidence percentage, severity percentage and AUDPC in bio-fungicides treated plots were not significantly different from water-sprayed control plots. Similarly, biometric attributes such as number of fruit, length and diameter of fruit, weight of fruit were also non-significant. Krilaxyl resulted significant effect in controlling downy mildew, providing maximum disease reduction (37.48%-50.72%) with lowest disease incidence (1.25-61.25%) and lowest value of AUDPC (138.7). Krilaxyl treated plots had higher number of fruit (6), longer length of fruit (17.15-18.95), higher diameter of fruit (4.16- 4.45 cm) and higher weight of fruit (677 - 759 g). Hence, chemical fungicide Krilaxyl was found better for the management of downy mildew disease in open field cucumber cultivation. Further, researches on bio-fungicides, especially of native strains are required for best result.

scholarly journals DH-plant production in culture of unpollinated ovules of cucumber (Cucumis sativus L.)

2019 ◽  
pp. 3-9
Author(s):  
E. A. Domblides ◽  
N. A. Shmykova ◽  
S. N. Belov ◽  
I. B. Korottseva ◽  
A. V. Soldatenko
Keyword(s):  
Cucumis Sativus ◽  
Plant Production ◽  
F1 Hybrids ◽  
Cucumis Sativus L ◽  
Line Production ◽  
High Productivity ◽  
Date Fruit ◽  
Homozygous Line ◽  
Cucurbitaceae Family

Relevance. The development of F1 hybrids distinguishing it from cultivars by high productivity, plant uniformity in ripening date, fruit sizes and quality is the promising trend in breeding program in cucumber (Cucumis sativus L.).The aim of the study was to optimize the gynogenesis induction condition in culture of unpollinated ovules in vitro in order to broad the generation of new breeding forms and to accelerate homozygous line production.Materials and methods. Eight promising cucumber accessions from Laboratory of Cucurbit Breeding and Seed Production (FSBSI FSVC) were taken for the study. The protocol developed in Laboratory of Biotechnology (FSBSI FSVC) for production of doubled haploid in Cucurbitaceae family was used in the experiment. The medium IMC with 30 g/L sucrose and 7g/L agar supplemented with 200 mg/L ampicillin and 0.2 mg/L thidiazuron (TDZ) was applied to induce gynogenic development.Results. The half-open bud or flower was shown to be the most suitable to be taken as an explant for cultivation. Highest number of embryo-like structures in all accessions developed from ovaries 2.1-2.6 cm long. Exposure to sterilization solution of sodium hypochlorite for 15 min made ovary wall softer and ovules can be then easily extracted without traumatizing. The traumatized ovule resulted in inhibited gynogenic development. Embryoids and calli had developed in all studied cucumber accessions, but well-formed plants were only obtained in six accessions. In total 26 plants were produced. The maximum gynogenesis induction equal to 63.1% was achieved in accession 1810. Maximum number of plant produced was twelve in accession 1763, but the greatest plant outcome 7.7% of the ovules with induced gynogenesis was observed in accession 1807. 

scholarly journals Effect of electromagnetic and Ultra Violate rays on production of Cucumis sativus L.

2014 ◽  
Vol 8 (1) ◽  
pp. 5-11
Author(s):  
Abedaljasim M. Al-Jibouri ◽  
Al-Bassam Suha M. ◽  
Al- Saadi Abas A.
Keyword(s):  
Electric Current ◽  
Cucumis Sativus ◽  
Open Field ◽  
Significant Interaction ◽  
Fruit Weight ◽  
Uv Exposure ◽  
Cucumis Sativus L ◽  
Fruit Length ◽  
Electronic Current ◽  
Flower Plant

Three American cucumber (Cucumis sativus L.) hybrids namely Lot Number (EM 285), labeled number 1, Hybrid super Green F1, labeled number 2 and Hybrid Top CAEEN F1, labeled number 3 were studied. Seeds of these hybrids were exposed to four frequencies of electric current (0, 1, 2, 2.5 ) amber(Am.) for 5 minutes and four periods of exposure for ultra-violate rays (UV) at 224 nanometer (nm) for (0,30,60 and 90) second. The treated seeds were sown on 2010 in open field that prepared and fertilized. The effect of electronic current Am and UV on the production of these hybrids was studied. Flowers number/ plant were recorded after 35 days of sowing; length, radius and weight of fruit were recorded after 46 days of sowing. Results showed significant differences between the hybrids in the studied parameters. Hybrid 3 showed a significant increase compared with hybrids 1 and 2 since it gave the highest number of flowers (19.97 flowers. Plant-1), tallest fruit length and radius of fruit (14.09 and 7.93 cm.fruit-1 respectively) and highest fruit weight 46.97 gm.fruit-1. While hybrid 2 gave 16.72 flower.plant-1, 10.35 cm.fruit-1, 5.72.fruit-1 cm (length and radius of fruit respectively ) and 30.2 g.fruit-1.The results also indicated a significant interaction between electric current and UV in all studied parameters. The 2 Am frequency and 60 sec of UV exposure gave highest flowers number (24.09 flower. plant-1) with an increase 85.16% compared with 2.5 Am frequency and 90 sec. of UV exposure. The results also showed a significant interaction between hybrids, electric current and UV. Hybrid 3 treated with 2 Am and 60 sec exposure gave highest fruit weight 86.33gm.fruit-1 with a significant increase for all tri- interactions.

scholarly journals Influence of seedling age on cucumber (Cucumis sativus L.) production

2016 ◽  
Vol 13 (2) ◽  
pp. 214-221
Author(s):  
G Jellani ◽  
MJ Atif ◽  
H Ullah ◽  
M Ali ◽  
M Musa
Keyword(s):  
Cucumis Sativus ◽  
Open Field ◽  
Agricultural Research ◽  
Direct Seeding ◽  
Research Center ◽  
Gross Margin ◽  
Cucumis Sativus L ◽  
Seedling Age ◽  
Experimental Area ◽  
Direct Seeded

Cucumber crop was evaluated for the influence of seedling age on its production during two consecutive years of 2011 and 2012 on experimental area of National Agricultural Research Center (NARC), Islamabad, Pakistan. Nursery of cucumber was raised in polythene tubes under protected structures (walk-in tunnels). Seedling transplantation of three different ages viz., 30, 45 and 60 days were compared with direct seeding in the open field. Seedling transplantation produced fruits earlier (22 days), increased availability period (41 days) as compared to direct seeded crop. Transplantation of 45 and 60 days old seedlings produced higher fruits yield of cucumber with higher gross return and gross margin. The results revealed that transplantation of 45 to 60 days old seedlings was suitable for achieving fruits earlier and profitable cucumber production technology.SAARC J. Agri., 13(2): 214-221 (2015)

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