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Se realizó la caracterización y evaluación morfológica de una colección del tomate tipo “cereza”, conocido comúnmente como "pajarito", o "vagabundo" (Lycopersicon esculentum var. cerasiforme), comparándola con el cultivar obsoleto de frutos de mesa de tamaño grande 'Marglobe' (Lycopersicon esculentum var. esculentum ). El estudio se llevó a cabo en el Centro de Investigación “La Selva”, de la Corporación Colombiana de Investigación Agropecuaria, Corpoica, ubicado a 2.120 msnm, con temperatura promedio de 170C, en un área perteneciente a la formación ecológica de bosque húmedo montano bajo. Para el efecto, se registraron 39 variables de índole cualitativa y 11 de naturaleza cuantitativa. Se encontró polimorfismo en 34 de los 39 atributos cualitativos y en los 11de naturaleza cuantitativa. Los análisis de conglomerados cualitativos, cuantitativos y cualitativo-cuantitativo, no indicaron un patrón claro de distribución entre accesiones del Centro de Origen (Perú-Ecuador) y del Centro de Domesticación (México-Mesoamérica), con intercalamiento en los fenogramas de estos materiales y materiales de otras zonas del mundo. Los resultados señalaron amplia variabilidad cualitativa y cuantitativa y diversos niveles de arreglo de las variables a nivel de accesiones individuales, lo cual señala un amplio potencial de utilización per se de la colección y para programas de mejoramiento. EI fenograma cualitativo-cuantitativo, transformando la última categoría de variables a escalas aditivas binarias, con un máximo de cuatro intervalos por característica, permitió discriminar entre la variedad botánica cerasiforme y el cultivar de tomates grandes 'Marglobe', lo cual no fue tan evidente a nivel del fenograma cualitativo, construido en escala binaria, y el cuantitativo con base en distancias derivadas de variables estandarizadas.


 

Tomate cereza, Tomate pajarito, Caractetización, Evaluación, Fenogramas, Cherry tomato

Clara Inés Medina, Corporación Colombiana de Investigación Agropecuaria (Agrosavia)

Programa de Biotecnología y Recursos Genéticos Vegetales, C.I. La selva, A.A. 470, Rionegro, Antioquia.

Mario Lobo, Corporación Colombiana de Investigación Agropecuaria (Agrosavia)

Programa de Biotecnología y Recursos Genéticos Vegetales, C.I. La selva, A.A. 470, Rionegro, Antioquia.
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