Cyclical phenotypic selection methods such as mass selection in open-pollinated (OP) cultivars were used widely in plant breeding until the inbred-hybrid approach began in the first half of the twentieth century. Mass selection was very effective to breed distinct OP cultivars but not for selecting high-yielding cultivars. This failure was due to selecting individual plants for a low heritability trait such as edible yield, low correlation of traits used in selection with edible yield, inappropriate male gamete control resulting from weak plot isolation, and poor plot techniques unable to control local environmental effects. Hence, population improvement methods, such as recurrent selection aiming to increase the frequency of favorable alleles by selecting the superior individuals in a population, intermating them, and selecting the best among their offspring, were sought in plant breeding (Hallauer et al. 2010). Recurrent selection differs from mass selection because selected individuals from the base population undergo progeny testing, and thereafter those selected based on this progeny testing data are intermated with each other to form the new population. Selection ensuing from recurrent selection can be further used in pedigree breeding for recycling inbred lines.