Revista de la Facultad de Agronomía de la Universidad del Zulia 2024-04-09T20:30:10+00:00 Jorge Vilchez Perozo Open Journal Systems <p>The Journal of the Faculty of Agronomy, Universidad del Zulia is a publication of the Agronomic Research Institute of the Faculty of Agronomy, Universidad del Zulia, published since 1968 and is supported by the Universidad del Zulia, in order to disseminate the results of researchers Venezuelans and other parts of the world, related to the agricultural field. The Rev. Fac. Agron. (LUZ) publishes four issues per year, i. e., every three months, under continuous publication format (rolling pass). , with original and unpublished scientific articles, technical notes, review articles, quick communications, extensive summaries of congresses and scientific meetings related to the agricultural area for the consideration of the Editorial Committee. The journal publishes research products of high scientific quality and promotes the exchange of publications and scientific activity at the agricultural level, in the areas of Plant Production, Animal Production, Food Technology and Socioeconomics. The topics included in these areas are: agrosystem management, environment, agricultural biotechnology, meat science, milk science, rural development, agricultural economics, agricultural entomology, fertilizers, post-harvest physiology, plant physiology, physiology and animal reproduction, pastures and forages, animal and plant genetics and improvement, weeds, animal nutrition, plant pathology, agri-food safety, agri-food systems and soils.</p> Molecular variation of lipoxygenase-associated genes in grain of commercial Mexican soybean cultivars 2024-03-17T19:40:07+00:00 Mónica López Ana Sifuentes Francisco Paredes Nicolás Maldonado Homar Gill <p>Lipoxygenase enzymes encoded by the <em>Lox</em>1, <em>Lox</em>2 and <em>Lox</em>3 genes play a crucial role in soybean grain, particularly in the development of off-flavors. Understanding molecular variation within <em>Lox</em> genes is essential for the improvement of soybean organoleptic traits. This study investigated the genetic variation in the internal regions of the <em>Lox</em>1, <em>Lox</em>2, and <em>Lox</em>3 genes in mature grain of commercially grown soybean cultivars in Mexico. Genomic DNA from a diverse panel of Mexican soybean cultivars was analyzed using resequencing techniques and <em>in-silico</em> analysis. Single nucleotide polymorphisms (SNP) within the <em>Lox</em>1, <em>Lox</em>2, and <em>Lox</em>3 genes were identified and characterized. The findings indicated that <em>Lox</em>3 gene displayed lower genetic variability compared to <em>Lox</em>1 and <em>Lox</em>2 genes, specifically, was identified a total of 26 SNPs in the <em>Lox</em>1 gene, 11 SNPs in the <em>Lox</em>2 gene, and 5 SNPs in the <em>Lox</em>3 gene among the examined cultivars. A non-synonymous SNP variant of the C/C genotype located in exon 6 of the <em>Lox</em>2 gene was associated with a destabilizing effect on the lipoxygenase 2 enzyme in the Guayparime S-10 and Huasteca 300 cultivars. These findings provide insights into the molecular variation of lipoxygenase-associated genes in Mexican soybean cultivars.</p> 2024-03-17T00:00:00+00:00 Copyright (c) Monica López Fernández, Ana María Sifuentes Rincón, Francisco Alejandro Paredes Sánchez, Nicolás Maldonado Moreno, Homar Rene Gill Langarica Physical and sensory quality of coffee dried in three prototypes of greenhouse solar dryers 2024-04-09T20:30:10+00:00 María Huamán-Murillo Shirley Mejía Silvia Murillo-Baca Fortunato Ponce-Rosas Maria Fuentes-Meza <p>Reducing the drying time of coffee without causing negative effects on cup quality has been the subject of several investigations. The objective was to determine the effect of three variants of a greenhouse-type solar dryer prototype on the physical, sensory and microbiological quality of coffee. The solar dryer prototype with three variants, prototype 1 (P1) greenhouse solar dryer, prototype 2 (P2) solar dryer with air extractor and prototype 3 (P3) solar dryer with air extractor and solar powered heaters, was compared to traditional drying (T0) (cement floor). Drying time, physical grain defects, yield, sensory and microbiological quality were evaluated. The best results were obtained in P3 with a drying time of 52 h (2 ¼ days), with dry parchment coffee beans without primary defects, higher yield in exportable gold coffee (83.24 %), sensory profile of 84.25 points qualified as specialty coffee (with Q Premium grade) and better safety than coffee obtained by traditional drying; demonstrating that the greenhouse type solar dryer with air extractor and solar energy heaters is a sustainable alternative to improve the efficiency of coffee drying while preserving its sensory quality, an essential value for producers to achieve better prices.</p> 2024-04-09T00:00:00+00:00 Copyright (c) 2024 María de Jesús Huamán-Murillo, Shirley Mayhory Mejía Garcia, Silvia María Murillo-Baca, Fortunato Candelario Ponce-Rosas, Maria Jose Fuentes-Meza