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| Nihei,Thiago Hideyo; Ferreira,Josué Maldonado. |
| O objetivo deste trabalho foi identificar o tipo de ação gênica predominante para resistência a Exserohilum turcicum, Phaeosphaeria maydis, Physopella zeae e Puccinia polysora, e determinar o potencial genético de linhagens endogâmicas de milho (Zea mays) para a obtenção de híbridos com elevado desempenho agronômico e resistência a doenças foliares. Os 41 híbridos F1, provenientes de cruzamentos dialélicos entre dez linhagens endogâmicas, e as testemunhas P3069, P30F90, BG7060, Balu761 e Dow2A120 foram avaliados em quatro locais, tendo-se utilizado o delineamento experimental de blocos ao acaso, com três repetições. Os híbridos LGS3xLGS9, LGS2 xLGS6, LGS2xLGS4 e LGS2xLGS3 apresentaram excelente desempenho em comparação às testemunhas, quanto aos diferentes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exserohilum turcicum; Phaeosphaeria maydis; Physopella zeae; Puccinia polysora; Zea mays; Efeito genético. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300008 |
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| Vieira,Rafael Augusto; Scapim,Carlos Alberto; Tessmann,Dauri José; Hata,Fernando Teruhiko. |
| Ten popcorn inbred lines were crossed in a circulant partial diallel matching scheme (group of lines derived from IAC 112 × group of lines from 'Zaeli'). The hybrids were evaluated in respect to grain yield (GY), popping expansion (PE), and resistance to southern rust (Puccinia polysora, Pp), in randomized block design, with three replications. Data was examined by analyses of variance and Kempthorne and Curnow's diallel analysis. General combining ability (GCA) was significant (p < 0.10) in the set 2-Zaeli for GY, PE, and partial resistance to Pp. This indicated that additive gene effects are predominant, and therefore breeding methods of recurrent selection are recommended. However, none of lines had outstanding GCA for GY and PE. The line P8.5 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; General and specific combining ability; Puccinia polysora; Plant breeding. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000300025 |
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| Giordani,Willian; Scapim,Carlos Alberto; Ruas,Paulo Maurício; Ruas,Claudete de Fátima; Contreras-Soto,Rodrigo; Coan,Marlon; Fonseca,Inês Cristina de Batista; Gonçalves,Leandro Simões Azeredo. |
| ABSTRACT Maize is one of the species with greater genetic diversity among cereals and possibly the most diverse crop species known. Accessing this variability is essential for maize breeding, allowing breeders to achieve progress of yield increasing, overcome environmental challenges or deal with pests and diseases. Among the maize diseases, southern rust is one of the most important, causing significant losses in yield and presenting severe epidemics worldwide. In the present study, the AFLP technique was applied to analyze population structure and genetic diversity among 145 tropical maize inbred lines, and to test for preliminary evidence of association between AFLP markers and the reaction to southern rust. Disease severity was evaluated in two crop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Gwas; Association studies; Cluster analysis; Genetic distance; Puccinia polysora. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200183 |
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| Godoy,Cláudia V.; Amorim,Lílian; Bergamin Filho,Armando; Silva,Herbert P.; Silva,Willian J.; Berger,Richard D.. |
| The progress of the severity of southern rust in maize (Zea mays) caused by Puccinia polysora was quantified in staggered plantings in different geographical areas in Brazil, from October to May, over two years (1995-1996 and 1996-1997). The logistic model, fitted to the data, better described the disease progress curves than the Gompertz model. Four components of the disease progress curves (maximum disease severity; area under the disease progress curve, AUDPC; area under the disease progress curve around the inflection point, AUDPCi; and epidemic rate) were used to compare the epidemics in different areas and at different times of planting. The AUDPC, AUDPCi, and the epidemic rate were analyzed in relation to the weather (temperature, relative humidity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Temporal analysis of epidemics; Staggered plantings; Puccinia polysora. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000300008 |
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