Euphytica

, Volume 195, Issue 2, pp 287–300

Spanish onion landraces (Allium cepa L.) as sources of germplasm for breeding calçots: a morphological and molecular survey

Article

DOI: 10.1007/s10681-013-0995-y

Cite this article as:
Simó, J., Pascual, L., Cañizares, J. et al. Euphytica (2014) 195: 287. doi:10.1007/s10681-013-0995-y

Abstract

Calçots are the immature floral stems of second-year resprouts of the ‘Blanca Tardana de Lleida’ (BTL) onion landrace, and to date, breeding has used only a few populations. So, we aimed to increase our knowledge of the variability of BTL and to explore its characteristics and genetic dissimilarity with other varieties that might be used in calçot breeding programs. We analyzed the agronomic and morphological traits of four populations of BTL, two synthetic varieties of BTL, 20 prestigious Spanish landraces, and 4 exotic onion landraces. Furthermore, we used three combinations of AFLP primers and seven microsatellites to analyze their genetic background. The Spanish landraces (including BTL) shared a large part of their genetic background, which showed considerable variability (heterozygosity around 0.5). Morphological traits also had high variability, so multiple breeding strategies can be used, ranging from intravarietal selection to crossings between populations to take advantage of the heterosis, both for the bulb and for the calçot improvement.

Keywords

CalçotsOnionsAFLP-SSRSpanish landracesBreedingGermplasm

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • J. Simó
    • 1
  • L. Pascual
    • 2
    • 3
  • J. Cañizares
    • 3
  • F. Casañas
    • 1
  1. 1.Departament d’Enginyeria Agroalimentària i Biotecnologia, Escola Superior d’AgriculturaUniversitat Politècnica de Catalunya/Fundació Miquel AgustíCastelldefelsSpain
  2. 2.Unité de Génétique et Amélioration des Fruits et Légumes, UR1052INRAAvignonFrance
  3. 3.Instituto Universitario de Conservación y Mejora de la Agrodiversidad ValencianaUniversidad Politècnica de ValenciaValenciaSpain