Affiliation: | (1) Department of Genetic Engineering, CINVESTAV, Campus Guanajuato, Apdo. Postal 629, C. P. 36821 Irapuato, Guanajuato, Mexico;(2) Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Campo Experimental General Terán, Nuevo León, Mexico |