1. Graduate Student, Dept. Genetics and Plant Production, Laboratory for Agronomy and Environment (DGA-CSIC), Estación Experimental de Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain. E-mail: farida@eead.csic.es
2. Tenured Scientist, Dept. Genetics and Plant Production, Laboratory for Agronomy and Environment (DGA-CSIC), Estación Experimental de Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain (corresponding author). E-mail: playan@eead.csic.es
3. Tenured Scientist, Dept. Genetics and Plant Production, Laboratory for Agronomy and Environment (DGA-CSIC), Estación Experimental de Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain. E-mail: jcavero@eead.csic.es
4. Tenured Scientist, Dept. Genetics and Plant Production, Laboratory for Agronomy and Environment (DGA-CSIC), Estación Experimental de Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain. E-mail: macoan@eead.csic.es
5. Researcher, Dept. of Soils and Irrigation, Laboratory for Agronomy and Environment (DGA-CSIC), Centro de Investigación y Tecnología Agroalimentaria, DGA, Apdo. 727, 50080 Zaragoza, Spain. E-mail: jfaci@aragob.es