Evaluation of intervarietal maize hybrids through partial diallel cross, considering four environments

Authors

  • Deoclécio Domingos Garbuglio Insituto Agronômico do Paraná
  • Pedro Mário de Araújo Insituto Agronômico do Paraná

DOI:

https://doi.org/10.5433/1679-0359.2006v27n3p379

Keywords:

Zea mays L, Combining ability, Open pollinated variety.

Abstract

In the summer season of 2004/2005, 12 intervarietal maize hybrids, crossed by the partial diallel scheme 3 x 4, the seven parental populations and three checks were evaluated at Iapar Experimental Stations in Londrina, Pato Branco, Ponta Grossa e Guarapuava. The objective was to identify crosses for future work with recurrent selection, inbred lines extraction and composite synthesis. For Heterosis variation cause, the differences were determined (P < 0.01) for traits grain yield and female flowering, indicating that crosses were superior in relation to parentals. Regarding General Combining Ability values for yield, the parentals from Group-1, PC 9407 and BR 106, showed values of 36.7 kg.ha-1 and 171.1 kg.ha-1, respectively, and the parentals from Group-2 presented values of 131.1 kg.ha-1 and 56.8 kg.ha-1, respectively,. For Specific Combining Ability, the largest values were from PC 9701 x BR 106 (205.4 kg.ha-1) e PC 9502 x PC 9407 (135.3 kg.ha-1) and, the largest values of grain yield average (9297 e 9018 kg.ha-1, respectively). Thepopulations PC 9701, BR 106, PC 9502 and PC 9407 are promising sources for inbred lines extraction aiming to superior maize hybrids development, composite synthesis and recurrent selection.

Author Biographies

Deoclécio Domingos Garbuglio, Insituto Agronômico do Paraná

Engº Agrº, Pós-Graduando em Genética e Melhoramento de Plantas - ESALQ / USP . Colaborador, IAPAR, Área de Melhoramento e Genética Vegetal – Programa Milho.

Pedro Mário de Araújo, Insituto Agronômico do Paraná

IAPAR, Pesquisador Dr. Área de Melhoramento e Genética Vegetal – Programa Milho.

Published

2006-06-30

How to Cite

Garbuglio, D. D., & Araújo, P. M. de. (2006). Evaluation of intervarietal maize hybrids through partial diallel cross, considering four environments. Semina: Ciências Agrárias, 27(3), 379–392. https://doi.org/10.5433/1679-0359.2006v27n3p379

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