Yield related key traits in the selection of super sweetcorn hybrids

Abstract

Super sweet corn breeding must develop hybrids that fully meet the expectations of the market. In this sense, the determination of keytraits for the selection of sweetcorn genotypes is a fundamental condition for breeding success. The objective of this work was to identify key traits for the selection of promising and contrasting genotypes of super sweet corn. The experiments were carried out in Guarapuava (PR), in two sowing dates. Seventeen traits related to the yield and quality of the ear were evaluated. To perform the multivariate analysis, data were subjected to diagnosis of multicolinearity, analysis of canonical variables, genetic divergence, hierarchical clusters, factor analysis, and canonical correspondence analysis. Grain yield, yield of dehusked ears, and number of commercial ears were considered related key traits in the identification of promising super sweet corn genotypes. Hybrid D3-20 × D5-41 presented higher averages than the others, considering the yield related keytraits.

Comparación de dulzura en maíz elotero con diferente fondo genético e incorporación del gen shrunken2

“…Con respecto al rendimiento de grano fresco rebanado, las poblaciones nativas normales Hgo-428 (Chalqueño) y C-Pue-185 (Cacahuacintle) fueron estadísticamente iguales (p≤ 0.05) al testigo comercial A7573 y numéricamente superiores a Sweeter 93. Zaluski et al (2021) consideraron el rendimiento de grano, el rendimiento de mazorcas deshojadas y el número de mazorcas comerciales como caracteres clave para la identificación de genotipos de maíces superdulces prometedores. Valdivia-Bernal et al (2010) encontraron que el criollo Jala fue sobresaliente en rendimiento de elote en comparación con el híbrido A7573.…”