Zamudio, F (reprint author), Univ Talca, Ctr Tecnol Alamo, Poplar Technol Ctr, 2 Norte 685,POB 747, Talca, Chile.Between 1999 and 2002 the Poplar Technology Center (PTC) introduced more than 2000 experimental poplar hybrids originated by the former Poplar Molecular Genetics Cooperative. Between 2002 and 2003, 12 nursery tests were established in central Chile. Initial growth and the presence of pests and diseases were recorded annually. At the end of 2005, about 100 hybrids were selected from nursery tests and planted in four candidacy tests during 2006. Genetic variation of growth and wood properties is still under study. Here, we present a summary of results obtained to date.