Comparative study of pairing, chaining crossing methods in intra-population improvement of the maize hybrid PMC-863 (Zea Mays L.)

Abstract

The objective of this work was to carry out a comparative study of two methods of intra-population crosses (in pairs and in chain) in the PMC-863 maize hybrid developed by INIA of Peru, to determine which allows obtaining a greater genetic gain in yield. The experiment was conducted at the locations of La Molina and Cañete during one agricultural season. Grain yield was evaluated as the main variable and genetic parameters were estimated. The results indicated the possibility of obtaining theoretical gains of 0.844 and 0.710 Tn/Ha by means of pair crosses and chain crosses, respectively. Chain crosses showed a slightly higher gain. Heritability values were moderate to high. It is concluded that both methods have potential to increase the frequency of favorable alleles in maize populations.