In vitro propagation of Cinchona officinalis L from seeds Nelson Ramiro Lima Jiménez, Moreno Serrano Moreno Serrano, Víctor Hugo Eras Guamán, Julia Minchala Patiño, González Zaruma González Zaruma, Magaly Yaguana Arévalo, Cristian Valarezo Ortega 168-178 2018-04-27