GRAPHIC ANALYSIS VS STABILITY PARAMETERS IN THE DISCRIMINATION OF CORN GENOTYPES

Abstract

The purpose of this study was to compare the correspondence and efficiency of the graphic analysis against the use of stability parameters, in the discrimination of genotypes, when the environmental conditions of the testing locations are known.
In the corn program far the south part of the State of Nuevo León three groups of genotypes initially selected according to their maturity ranges were evaluated in seven locations; 32 genotypes were selected from them for this study taking into account their yield capacity and adapta­tion within the zone. In the graphic analysis comparisons are made with the mean yield of the evaluation group against the particular yield of each genotype in the different loca­tions. Results indicated that when the environmental condi­tions of each location are known the graphic analysis makes a better genotype discrimination.