Examinando por Autor "Almidon Ramirez, Karen Karina"

Mostrando 1 - 3 de 3

Desempeño agronómico de líneas de frijol común (Phaseolus vulgaris L.) bajo abonamiento orgánico en condiciones de casa malla, Chincha, Perú
(Decanato de Agronomía, Universidad Centroccidental Lisandro Alvarado (UCLA), Venezuela, 2026-05-01) Camargo Cobeñas, Marcos Antonio; Almidon Ramirez, Karen Karina; Rojas Meza, María Elena; Aybar Peve, Leandro Joel; Terán Rojas, José Alfonso
El frijol común (Phaseolus vulgaris L.) es un cultivo estratégico por su valor nutricional y su asociación con microorganismos fijadores de nitrógeno, aunque en regiones como Chincha (Perú) los rendimientos permanecen bajos, lo que demanda alternativas de manejo. Se evaluó la respuesta agronómica de las líneas Larán Mejorado y Waf 78/20 a la aplicación de compost y BlackSoil en dosis de 8 y 16 % (p/p), bajo un Diseño en Bloques Completos al Azar (DBCA) con arreglo factorial 2 × 2 × 2 y dos testigos, con cuatro bloques en condiciones de casa malla. Se evaluaron 12 variables agromorfológicas y la densidad aparente del sustrato, analizadas mediante efectos principales e interacciones, pruebas paramétricas y no paramétricas, coeficientes de correlación de Pearson y análisis de componentes principales (ACP). Se obtuvo que el factor genético fue la principal fuente de variación. Larán Mejorado destacó por una respuesta más uniforme, mayor precocidad y mejores componentes de rendimiento, favorecidos por la aplicación de compost; mientras que Waf 78/20 se asoció con mayor crecimiento vegetativo y mayor sensibilidad a cambios en la densidad aparente del sustrato; en esta línea, la aplicación de BlackSoil se relacionó con ciclos fenológicos más prolongados y menor peso de semilla. Los hallazgos evidencian que la genética determina en mayor medida la respuesta al abonamiento orgánico, resaltando la importancia del genotipo en prácticas de manejo; sin embargo, estos resultados deben validarse en condiciones de campo y múltiples ambientes.
Phenotypic diversity indices and multivariate analysis of Peruvian common bean (Phaseolus vulgaris L.) germplasm
(Agricultural Research Communication Centre (ARCC Journals), 2026-08-11) Chihuan Palomino, Evelin Analy; Almidon Ramirez, Karen Karina; Rojas Meza, María Elena; Terán Rojas, José Alfonso; Lobato Galvez, Roiser Honorio; Aybar Peve, Leandro; Valderrama Romero, Antonio; Camargo Cobeñas, Marcos Antonio
Background: Phaseolus vulgaris L. is a globally important legume due to its nutritional value and its contribution to food security and agricultural sustainability. Although Peruvian germplasm exhibits high phenotypic variability, information regarding accessions from the INIA Germplasm Bank remains limited. This study characterized the phenotypic diversity of 66 accessions using diversity indices and multivariate analyses under coastal Peruvian conditions. Methods: A total of 35 agro-morphological traits (18 qualitative and 17 quantitative) were evaluated using CIAT descriptors. Diversity was assessed using Shannon and Pielou evenness indices, as well as multivariate analyses including hierarchical clustering based on Gower distance, FAMD, PCA and MCA. Result: High phenotypic variability was observed, resulting in four distinct clusters. FAMD showed that hundred-seed weight, leaf width and length and primary seed color were the main contributors to total variance. PCA revealed a positive correlation between seed weight and leaf traits, whereas the number of pods per plant and seeds per pod showed a negative association with these variables. MCA and diversity indices highlighted seed color, growth habit and standard petal pigmentation as key discriminating traits. Cluster II exhibited the highest dispersion and phenotypic diversity, whereas Cluster IV showed higher yield-related components, demonstrating the potential of these accessions for use in breeding programs and genetic resource conservation.
Phenotypic variability and yield component analysis of lima bean (Phaseolus lunatus L.) genotypes under coastal conditions of Peru
(Agricultural Research Communication Centre (ARCC), 2026-05-05) Camargo Cobeñas, Marcos Antonio; Almidon Ramirez, Karen Karina; Rojas Meza, María Elena; Terán Rojas, José Alfonso
Background: Lima bean (Phaseolus lunatus L.) is an important grain legume cultivated in tropical and subtropical regions and contributes significantly to food security and local agriculture, particularly in Peru. However, information on the agronomic variability of lima bean germplasm under coastal conditions of Peru remains limited. This study aimed to evaluate the phenotypic variability and yield-related traits of lima bean genotypes from the INIA Germplasm Bank. Methods: Seven genotypes were evaluated under field conditions in Pisco, Ica (Peru), using a randomized complete block design with four replications. Twelve agronomic and morphological traits related to pod, seed and yield components were recorded. Data were analyzed using analysis of variance, Pearson correlation, principal component analysis and hierarchical clustering. Result: Significant differences among genotypes were observed for most traits, indicating considerable phenotypic variability. Grain yield per plant showed positive correlations with the total number of pods per plant and the number of marketable pods. The first two principal components explained 51.14% of the total variation and separated genotypes mainly according to yield components and morphological traits. Cluster analysis grouped the genotypes into three clusters, identifying genotype Ac4 as the most promising material due to its favorable association with yield-related traits and lower incidence of pest-infested pods.