Agronomic performance of new popcorn hybrids in Northwest of Paraná State, Brazil - DOI: 10.4025/actasciagron.v31i1.4142

• Autor(a) principal: Vieira, Rafael Augusto
• Data de Publicação: 2009
• Outros Autores: Rodovalho, Marcos de Araújo, Scapim, Carlos Alberto, Tessmann, Dauri José, Amaral Júnior, Antônio Teixeira do, Bignotto, Lucas Souto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4142
• topic: Zea mays L.; grain yield; popping expansion; leaf diseases; Zea mays L.; rendimento de grãos; capacidade de expansão; doenças foliares

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.