Resumen

LAURA, Julio Cesar; DAVILA, Jesús  y  MERCADO, Hans. Evaluación del comportamiento agronómico de dos líneas promisorias de cebolla (Allium cepa L.) tolerantes a floración prematura en condiciones de altiplano, Centro Experimental Kallutaca. Info INIAF [online]. 2014, vol.1, n.3, pp. 79-85. ISSN 2308-250X.

The onion is a biennial plant that requires low temperatures to induce flowering. This is an unwanted commercial production of bulbs and bulb formation racing phenomenon. In the induction to flowering genotype, plant age and environmental factors interact. Given the need for a variety of onion bolting tolerant and adapted to the environmental conditions of the Bolivian altiplano, the National Institute of Agricultural and Forestry Innovation through the National Horticulture Program has developed red onion lines with tolerance to this factor. In order to evaluate the agronomic performance of these lines, an essay in Kallutaca Experimental Center located in the highlands of La Paz was performed, where two promising lines of onion with a control variety were compared. The onion Promising Line 2 noted for his performance of commercial bulbs, which was 39.3 t ha-1. The control variety had the highest percentage of flowering plants with 22.4 %, while promising lines presented both a percentage of 2.8 %, showing great tolerance to floral induction by cold. These materials still are under final development which is expected to become as variety in short-term.

Palabras llave : Promising lines; Allium cepa; Tolerance to bolting; Agronomic performance.