Genetic behavior for yield components in a dwarf maize population
DOI:
https://doi.org/10.29312/remexca.v0i26.2943Keywords:
diallel analysis, genetic effects, heritabilityAbstract
Yields components are important variables to make indirect selection towards productivity. In maize, yield is correlated with ear length, hectoliter weight and grain size. This research analyzed the results of a diallel that underwent yield trials in two locations during 2016, formed with five lines representative of a dwarf maize population. The above to estimate the genetic effects and heritability of yield through three components of yield, in order to outline the improvement strategy to be used in each component. Genetic analysis was performed using the Griffing’s Method III Model II. The results showed that the variance of the additive type governs the behavior of the ear length and yield variables. The type of non-additive gene action is responsible for the phenotypic behavior of hectoliter weight, while the reciprocal effects (maternal and non-maternal) are the ones that most influence phenotypic expression of grain depth. In addition, high heritability values were found with an estimated of 0.56 for ear length and 0.58 for yield, while for hectoliter weight and grain depth the heritability found is low 0 and 0.07, respectively. It is suggested that the full-sib improvement scheme be used for ear length and yield, for hectoliter weight and grain depth it is preferable to use selfed progenies.
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