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| Mafra,Gabrielle Sousa; Amaral Junior,Antonio Teixeira do; Vivas,Marcelo; Santos,Juliana Saltires dos; Silva,Fernando Higino de Lima e; Guimarães,Amanda Gonçalves; Pena,Guilherme Ferreira. |
| ABSTRACT The present study resulted from the lack of information on the genotypic expression ruling the resistance to rust and on the main traits of economic importance to the herein addressed crop. The combining ability of 16 popcorn lines and hybrids was assessed in partial diallel cross in two representative locations in Rio de Janeiro State, Brazil, where forty simple hybrids were obtained. The experiments followed a completely randomized block design with four repetitions and were conducted under natural infestation conditions in order to test the southern rust severity in the entire plant (SSW) and in the leaf of the first ear (SFPE), as well as the morpho-agronomic traits of greater interest: grain yield (GY) and popping expansion (PE). Additive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Circulant diallel; General and specific combining ability; Southern rust. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400519 |
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| CASELA,CARLOS R.; FERREIRA,ALEXANDRE S.. |
| The main objective of this work was to evaluate the variability of the southern rust pathogen Puccinia polysora in Brazil, based on its virulence on a set of maize (Zea mays) cultivars. Sixty single pustule isolates, from different areas of occurrence of southern rust, were evaluated for their virulence to 50 maize experimental hybrids. Six cultivars showed a clear distinction between susceptible and resistant reaction, and were used to characterize the variability of the pathogen. Seventeen virulence patterns were identified among the 60 isolates tested. The most frequent virulence patterns identified, were observed in all locations of sampling, which suggests the absence of geographical differentiation among prevalent populations of P. polysora in Brazil. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Southern rust; Virulence. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000400015 |
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