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| Costa,Rodrigo Véras da; Zambolim,Laércio; Silva,Dagma Dionísia da; Cota,Luciano Viana; Casela,Carlos Roberto. |
| O objetivo deste trabalho foi avaliar a eficiência do uso de multilinhas dinâmicas, por meio de misturas genéticas em populações de híbridos triplos, no manejo da antracnose do sorgo, causada pelo fungo Colletotrichum sublineolum. Foram obtidos 18 híbridos triplos a partir de sete linhagens que continham genes distintos para resistência à doença. Os 25 genótipos de híbridos e linhagens foram avaliados em campo. Verificou-se, em alguns híbridos, grau de resistência superior ao observado para a linhagem mais resistente utilizada nos cruzamentos, o que indica efeito aditivo dos genes de resistência das diferentes linhagens na composição da resistência final dos híbridos. O usodas multilinhas dinâmicas reduziu a intensidade da doença no campo e aumentou a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colletotrichum sublineolum; Sorghum bicolor; Híbridos triplos; Piramidação de genes; Resistência dilatória; Variabilidade genética. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000200004 |
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| Costa,Rodrigo Véras da; Silva,Dagma Dionísia da; Cota,Luciano Viana; Campos,Leonardo José Motta; Almeida,Rodrigo Estavam Munhoz de; Bernardes,Fernanda Pinheiro. |
| Abstract: The objective of this work was to evaluate the incidence of corn stunt disease and its effects on the grain yield of off-season corn (Zea mays) hybrids in different sowing seasons. The experiment was conducted in three sites in the state of Tocantins, in different sowing seasons, in a randomized complete block design, with 30 hybrids (treatments) and three replicates. Corn stunt disease incidence was assessed at 80 days after emergence, varying between hybrids and sowing seasons, with a marked effect of sowing season. The most resistant hybrids were: MG652 PW, Penta VIP, MG600 PW, NS90 PRO2, LG3040 VIP3, MG580 PW, and Defender VIP. The Fórmula VIP2 hybrid was the most susceptible to corn stunt disease. The incidence of the disease increased in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dalbulus maidis; Zea mays; Genetic resistance; Mollicutes; Phytoplasma; Spiroplasma. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102303 |
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| Costa,Rodrigo Véras da; Simon,Jones; Cota,Luciano Viana; Silva,Dagma Dionísia da; Almeida,Rodrigo Estevam Munhoz de; Lanza,Fabrício Eustáquio; Lago,Bruno Cocco; Pereira,Alan Alves; Campos,Leonardo José Motta; Figueiredo,José Edson Fontes. |
| Abstract: The objective of this work was to assess yield losses due to stalk rot in corn (Zea mays) hybrids, as well as to identify the main pathogenic fungi responsible for the disease during the off-season, in the state of Tocantins, Brazil. Two field experiments were carried out, one with five hybrids, in 2015, and another with four, in 2016. Ears of healthy and stalk rot-infected plants were collected from each plot, at harvest. Ear size, grain and ear weights, and grain moisture content were measured. From each diseased plant, a stalk piece with two to three nodes was removed for pathogen identification and quantification. The most common pathogens were: Fusarium graminearum, Stenocarpella maydis, and Macrophomina phaseolina. All yield parameters were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium graminearum; Zea mays; Lodging; Stalk breakage; Stem disease. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102300 |
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