Table of Contents
ISRN Agronomy
Volume 2012, Article ID 349565, 10 pages
http://dx.doi.org/10.5402/2012/349565
Research Article

Field Evaluation of Twelve Clones of Oregano Grown in the Main Production Areas of Argentina: Identification of Quantitative Trait with the Highest Discriminant Value

1Cátedra de Genética, Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Avenida Valparaíso s/n, Ciudad Universitaria, CC 509, 5000 Córdoba, Argentina
2EEA La Consulta, INTA, Ex Ruta 40 km 96, La Consulta, San Carlos, Mendoza, Argentina

Received 24 April 2012; Accepted 28 May 2012

Academic Editors: O. Ferrarese-Filho and I. Vasilakoglou

Copyright © 2012 Lorena E. Torres et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In Argentina, oregano (Origanum spp.) is one of the most important aromatic species. Leaves and flowering tops are used as seasoning, targeting the retail consumer, industrial and less to export. Local production has low-average yields due to the variability of cultivated material, the vegetative propagation methods used, and the lack of knowledge and adaptive experimentation on advanced cultivation practices. Clones of oregano grown in the country were collected in order to characterize the germplasm used in Argentina. Twelve oregano clones, sanitized by meristems culture and micropropagated in vitro, were field evaluated in three different growing locations. Regardless of growing site, the quantitative variables with more discriminating value were essential oils yield, internode length, length of the longest branch, fresh weight, dry weight of leaf and stem, leaf/stem ratio, and leaf area. Based on the quantitative traits, oregano clones can be classified into four groups. From the observations based on botanical characteristics, it was determined that the evaluated clones belong to three different taxa: Origanum vulgare ssp. vulgare, Origanum vulgare ssp. hirtum, and Origanum x majoricum (hybrid). Within each group, the clones belong to the same taxon.