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Revista Colombiana de Ciencias Hortícolas
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  This is an Open Access Journal Open Access journal
ISSN (Print) 2011-2173 - ISSN (Online) 2422-3719
Published by Universidad Pedagógica y Tecnológica de Colombia Homepage  [10 journals]
  • Selection of stevia elite genotypes aiming at the development of cultivars
           adapted to the Brazilian Savanna

    • Authors: Fellipe Celestino de Castro, Fábio Gelape Faleiro, Jamile da Silva Oliveira, Renato Fernando Amabile, João Victor Pinheiro Melo
      Abstract: In this work, the objective was to evaluate morphoagronomic traits, correlate and select elite genotypes of Stevia rebaudiana (Bert.) Hemsley with high productivity, and adapted to Brazilian Savanna conditions. A total of 230 genotypes were evaluated, from the Embrapa Cerrados Working Collection, from 2018 to 2019, with 24 evaluations, carried out in six cuts, with each cut representing a certain moment of generation of the response data of the analyzed genotypes. Four traits were analyzed: green biomass production (g), plant height (cm), tillering number and juvenile period of each individual. The means of the characteristics of each genotype were correlated according to Pearson's correlation coefficient. The Mulamba and Mock index was applied, with a selection intensity of 10%, to choose the superior genotypes. There are high positive correlations between juvenile period, height and green biomass production. The selected population were 23 superior genotypes, based on the application of rank sum resulting in high selection gains for the traits of interest. Finally, the selection of elite stevia genotypes with high production of green biomass, greater insensitivity to length of the daily light period, as well as taller plants, are essential for the continuity of the stevia breeding program on the Brazilian Savanna.
      PubDate: 2022-09-01
      DOI: 10.17584/rcch.2022v16i3.14727
      Issue No: Vol. 16, No. 3 (2022)
       
  • Effect of rootstock/scion compatibility on fruit and foliar nutrient
           composition in avocado (Persea americana Mill.) cv. Hass in Colombia

    • Authors: Álvaro de Jesús Tamayo-Vélez, Jorge Alonso Bernal-Estrada, Cipriano Arturo Díaz-Díez, Lucas Esteban Cano-Gallego, Oscar de Jesús Córdoba-Gaona
      Abstract: There is limited information in Colombia on the effect of rootstock compatibility on the amount and concentration of nutrients in avocado cv. Hass. This study aimed to determine the effect of rootstock/scion compatibility on fruit and leaf nutritional concentration. This experiment was developed in 9-year-old commercial avocado ‘Hass’ orchards in three locations with a moderately cold climate in Colombia (Rionegro, El Peñol, and Anserma). The scion cv. Hass was grafted on rootstocks with an Antillean origin. 15 trees were selected and marked in each orchard and location, and 25 fruits per tree and per treatment were taken at random (compatible and incompatible grafting). Subsequently, the fresh and dry weight of the skin (epicarp), the pulp (mesocarp), seed, and the seedcoat were obtained. The concentration of major and minor elements was analyzed in each tissue. There was no significant effect on the concentration of nutrients in the fruits from trees with and without compatibility between rootstock and scion. Statistical differences were observed at three locations in the concentration of nutrients in the different parts of the fruit. The nutrient with the highest concentration in the four fruit tissues was K, followed by N. The seed coat had the highest concentration of nutrients for all locations. The embryo had the lowest concentration of the major elements, such as N, K, Ca, Mg, S, and P. The order of the concentration in the fruit tissues was: K> N> Mg> P> Ca> S> Fe> B> Zn > Mn. The compatibility did not show significant differences between the leaf mineral content, nor did it affect the nutrient balances for each element at the foliar level.
      PubDate: 2022-09-01
      DOI: 10.17584/rcch.2022v16i3.14833
      Issue No: Vol. 16, No. 3 (2022)
       
  • Morphological responses of Andean blueberry (Vaccinium meridionale Swartz)
           plants growing in three environments at different altitudes

    • Authors: Andrés David Becerra, Santiago Quevedo-Rubiano, Stanislav Magnitskiy, Héctor Orlando Lancheros
      Abstract: The Andean blueberry (Vaccinium meridionale Swartz) is a promising fruit crop that has gained importance in the market because of its nutritional and medicinal properties; however, there are few studies on the optimal conditions for growth and production. In this study, the vegetative growth of Andean blueberry plants was evaluated for 200 days in three sites at different altitudes in the Department of Cundinamarca (Colombia): municipality of San Francisco (1,885 m a.s.l.), Bogota (Universidad Nacional de Colombia - UNAL, 2,556 m a.s.l.), and Cruz Verde páramo (3,298 m a.s.l.). For the evaluation, 2-year-old plants were used that were propagated in vitro. The experiment had a repeated measures design, with 3 treatments (locations) and 5 data collection times, with destructive measurements at the beginning and at the end of the trial. Data for leaf area per plant, plant height, stem width, number of primary branches, branch length, and chlorophyll contents in leaves were taken. The tallest plants, with the largest leaf area and most dry matter, were found at the UNAL (2,556 m a.s.l.). Morphological and physiological variations were observed in response to each of the environments, with correlations between the growth variables and the environmental variables. The highest percentage distribution of dry matter in leaves was in the plants from the Cruz Verde páramo (3,298 m a.s.l.), while the percentage distribution of dry weight in the stem was higher in the plants from San Francisco (1,885 m a.s.l.). The percentage distribution of root dry weight was greater in the plants from San Francisco than those from other locations. The results indicated that the Andean blueberry plants had the most suitable conditions for vegetative growth at altitudes close to 2,556 m a.s.l.
      PubDate: 2022-09-01
      DOI: 10.17584/rcch.2022v16i3.15034
      Issue No: Vol. 16, No. 3 (2022)
       
  • Potential use of electrochemically synthesized silver nanoparticles on
           Rice Panicle Blight Pathogen Burkholderia glumae

    • Authors: Giovanni Chaves-Bedoya, Hilda Angélica Padilla, Luz Yineth Ortiz-Rojas, Gabriel Peña-Rodríguez
      Abstract: Burkholderia glumae is the main causal agent of Bacterial Panicle Blight (BPB) in rice (Oriza sativa L.), a disease that generates losses in production worldwide. Despite its economic importance, effective control measures and varieties of rice with complete resistance to the disease have not yet been available. In this study, the antimicrobial activity of electrochemically synthesized silver nanoparticles (AgNPs) against B. glumae was evaluated. For the AgNPs synthesis, a DC power supply (UNI-T®) regulated at 24 V was used, which was connected to two cylindrical electrodes of high purity silver (Aldrich-99.99%), using distilled water as electrolyte. The concentration of AgNPs was determined by measuring the total dissolved solids (TDS) through the multiparameter HandyLab 680 FK. The antibacterial activity of these nanoparticles against B. glumae was determined by the method of broth macrodilution method, at different concentrations (1-10 mg L-1). The Minimum Inhibitory Concentration (MIC) was determined in 5 mg L-1 of AgNPs. The results of this study revealed that AgNPs could be considered as promising nanopesticide to control BPB disease in rice.
      PubDate: 2022-09-01
      DOI: 10.17584/rcch.2022v16i3.14738
      Issue No: Vol. 16, No. 3 (2022)
       
 
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