Examinando por Autor "Medina Morales, Percy Edilberto"

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Collection and morphological characterization of 149 accessions of achiote (Bixa orellana L.) from seven departments in Perú
(Universidad Nacional Agraria La Molina, 2020-11-20) Nolasco Chumpitaz, Juan Luis; Ccoyllo Llacsa, Paul Andersson; Koc Sanchez, Gabriela Elena; Medina Morales, Percy Edilberto
The aim of this study was to characterize and identify groups of achiote (Bixa orellana L.) with characteristics related to increased yield and bixin content. A total of 149 achiote accessions were collected from the departments of Loreto, San Martin, Junín, Pasco, Huánuco, Ucayali, and Cusco, in Perú. These were then evaluated using ten quantitative and three qualitative capsule and seed descriptors. Undesirable characteristics such as high spinosity and dehiscence predominated, while none of the quantitative descriptors correlated significantly with bixin content. Principal component analysis indicates that the quantitative descriptors (except for bixin content) are statistically significant, forming four clusters. Notably, one of the clusters included accessions characterized by heavy seeds, and another cluster included accessions with high number of seeds and bixin content.
Evaluación de dos métodos de clonación de plantas superiores de achiote (bixa Orellana L.) para el establecimiento de un jardín clonal en la EEA Pichanaki – Junín.
(Instituto Nacional de Innovación Agraria, 2020-09) Medina Morales, Percy Edilberto
La presentación contiene el resumen de los resultados obtenidos en el proyecto PNIA 187_PI. Como logros del proyecto tenemos el jardín clonal establecido con 7 accesiones superiores en contenido de bixina (mayor al 3.625 g/100g). Un artículo científico relacionado a la caracterización morfológica de achiote en Perú presentado para su evaluación, un manual técnico del cultivo de achiote que contiene información sobre el manejo y recomendaciones técnicas para llevar a cabo una plantación exitosa y un vivero implementado en la EEA Pichanaki el cual sirvió para los experimentos del proyecto y será utilizado por esta estación para la producción de plantones de frutales, forestales, cacao y café, mejorando así la infraestructura de del INIA y generando una mayor fuente de ingresos.
Genetic diversity and population structure of a Peruvian cattle herd using SNP data
(Frontiers Media S.A., 2023-03-10) Corredor Arizapana, Flor Anita; Figueroa Venegas, Deyanira Antonella; Estrada Cañari, Richard; Salazar Coronel, Wilian; Quilcate Pairazamán, Carlos Enrique; Vásquez Pérez, Héctor Vladimir; Gonzales Malca, Jhony Alberto; Maicelo Quintana, Jorge Luis; Medina Morales, Percy Edilberto; Arbizu Berrocal, Carlos Irvin
New-generation sequencing technologies, among them SNP chips for massive genotyping, are useful for the effective management of genetic resources. To date, molecular studies in Peruvian cattle are still scarce. For the first time, the genetic diversity and population structure of a reproductive nucleus cattle herd of four commercial breeds from a Peruvian institution were determined. This nucleus comprises Brahman (N = 9), Braunvieh (N = 9), Gyr (N = 5), and Simmental (N = 15) breeds. Additionally, samples from a locally adapted creole cattle, the Arequipa Fighting Bull (AFB, N = 9), were incorporated. Female individuals were genotyped with the GGPBovine100K and ma les with the BovineHD. Quality control, and the proportion of polymorphic SNPs, minor allele frequency, expected heterozygosity, observed heterozygosity, and inbreeding coefficient were estimated for the five breeds. Admixture, principal component analysis (PCA), and discriminant analysis of principal components (DAPC) were performed. Also, a dendrogram was constructed using the Neighbor-Joining clustering algorithm. The genetic diversity indices in all breeds showed a high proportion of polymorphic SNPs, varying from 51.42% in Gyr to 97.58% in AFB. Also, AFB showed the highest expected heterozygosity estimate (0.41 ± 0.01), while Brahman the lowest (0.33 ± 0.01). Besides, Braunvieh possessed the highest observed heterozygosity (0.43 ± 0.01), while Brahman the lowest (0.37 ± 0.02), indicating that Brahman was less diverse. According to the molecular variance analysis, 75.71% of the variance occurs within individuals, whereas 24.29% occurs among populations. The pairwise genetic differentiation estimates (FST) between breeds showed values that ranged from 0.08 (Braunvieh vs. AFB) to 0.37 (Brahman vs. Braunvieh). Similarly, pairwise Reynold’s distance ranged from 0.09 (Braunvieh vs. AFB) to 0.46 (Brahman vs. Braunvieh). The dendrogram, similar to the PCA, identified two groups, showing a clear separation between Bos indicus (Brahman and Gyr) and B. taurus breeds (Braunvieh, Simmental, and AFB). Simmental and Braunvieh grouped closely with the AFB cattle. Similar results were obtained for the population structure analysis with K = 2. The results from this study would contribute to the appropriate management, avoiding loss of genetic variability in these breeds and for future improvements in this nucleus. Additional work is needed to speed up the breeding process in the Peruvian cattle system.
Implementación del riego automatizado y mejora de la calidad de aguas no seguras para la agricultura mediante un sistema de tratamiento de aguas con iones ferrato (VI) en el Centro Experimental La Molina
(Instituto Nacional de Innovación Agraria, 2020-07-30) Medina Morales, Percy Edilberto
El proyecto tuvo como propósito mejorar la calidad del agua para riego a través de la implementación de una unidad automatizada que remueve sustancias y microorganismos contaminantes, controla el pH y controla la frecuencia e intensidad de riego por goteo, evaluado a través del cultivo. Los objetivos específicos del mismo fueron: “Desarrollo de la unidad automatizada de tratamiento y riego para el Centro Experimental La Molina”, “Implementación e instalación de la unidad automatizada en el Centro Experimental La Molina y la Estación Experimental Agraria de Moquegua”, “Evaluación de la calidad del agua tratada con la unidad automatizada en el Centro Experimental La Molina”, Comparación de los efectos fisiológicos del cultivo del frijol canario 2000 regado con agua tratada frente al agua sin tratar en el Centro Experimental La Molina”, “Comparación de la calidad de lechuga y rabanito regado con agua tratada y con agua sin tratar en el Centro Experimental La Molina” y “Fortalecimiento del Centro Experimental La Molina y la Estación Experimental Agraria de Moquegua”