Effect of F-1 and F-2 generations on genetic variability and working steps of doubled haploid production in maize - Couto, Evellyn Giselly de Oliveira; Cury, Mayara Neves; Souza, Massaine Bandeira e; Granato, Italo Stefanine Correia; Vidotti, Miriam Suzane; Garbuglio, Deoclecio Domingos; Crossa, Jose; Burgueno, Juan; Fritsche-Neto, Roberto (PLOS ONE, 2019)