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Desempenho agronômico de novos híbridos de milho-pipoca no Noroeste do Estado do Paraná

2009; Editora da Universidade Estadual de Maringá (Eduem); Volume: 31; Issue: 1 Linguagem: Inglês

10.4025/actasciagron.v31i1.4142

1807-8621

Rafael Augusto Vieira, Marcos de Araújo Rodovalho, Carlos Alberto Scapim, Dauri José Tessmann, Antônio Teixeira do Amaral Júnior, Lucas Souto Bignotto,

Crop Yield and Soil Fertility

In maize, variations on agronomic performance in distinct environments are common and more evident for one-way hybrids. The objective of this work was to evaluate the performance of new one-way popcorn hybrids developed by the Breeding Program of the State University of Maringá, in northwestern Paraná. The characteristics evaluated were: grain yield, popping expansion, plant height, ear height and the intensity of Southern rust (Puccinia polysora), Northern leaf blight (Exserohilum turcicum), and phaeosphaeria leaf spot (Phaeosphaeria maydis/Pantoea ananas). The assay was carried out into randomized block design with three replications in Maringá, state of Paraná, Brazil, during the 2006/2007 cropping season. The treatments were 27 simple popcorn hybrids obtained from S5 endogamic inbreds and commercial cultivars BRS Angela, IAC 112 and Jade. Significant differences (p ≤ 0.05) were verified among hybrids for all characteristics. The hybrid from C and K inbreds presented better indexes for grain yield and popping expansion; and was susceptible to Southern rust. About diseases, the hybrids from the L, H and K inbreds showed greater resistance levels to Southern rust, and hybrids from G inbred had better Northern leaf blight resistance. Hybrids from L and M inbreds showed better phaeosphaeria leaf spot resistance.