Agronomic performance of super-sweet corn genotypes in the north of Rio de Janeiro

• Main Authors: Pedro Henrique Araújo Diniz Santos, Messias Gonzaga Pereira, Roberto dos Santos Trindade, Keila Silva da Cunha, Geovana Cremonini Entringer, Julio Cesar Fiorio Vettorazzi
• Format: Article
• Language: English
• Published: Brazilian Society of Plant Breeding 2014-03-01
• Series: Crop Breeding and Applied Biotechnology
• Subjects: Zea mays; super-sweet corn; intervarietal hybrids; heterosis
• Online Access: http://www.sbmp.org.br/cbab/siscbab/uploads/bd5371c1-4295-c092.pdf

We investigated the agronomic performance of super-sweet corn genotypes. Super-sweet corn genotypes were backcrossed with regionally adapted field varieties (CIMMYT 8 and Piranão 8). Eight morphological and yield-related traits were evaluated. A significant effect of interaction was observed between the five groups of genotypes (donor parents; super-sweet backcrossed parents; super-sweet intervarietal hybrids; common intervarietal corn hybrids; and field corn populations). Despite the low yield of genotype SH2 Piranão, the hybrids resulting from interbreeding of the backcrossed parents for the improvement of super-sweet corn were promising. The agronomic performance of the super-sweet parents and their hybrids indicates the possibility of breeding lines with high genetic value to obtain single-cross hybrids and cultivars of super-sweet corn adapted to the northern region of the State of Rio de Janeiro.