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| Pierozzi,Pedro Henrique Braga; Ribeiro,Aliny Simony; Moreira,José Ubirajara Vieira; Laperuta,Larissa Di Cássia; Rachid,Breno Francovig; Lima,Wilmar Ferreira; Arias,Carlos Alberto Arrabal; Oliveira,Marcelo Fernandes de; Toledo,José Francisco Ferraz de. |
| Asian soybean rust (ASR), caused by the phytopathogenic fungi Phakopsora pachyrhizi, has caused large reductions in soybean (Glycine max) yield in most locations in Brazil where it has occurred since it was first reported in May 2001. Primary efforts to combat the disease involve the development of resistant cultivars, and four dominant major genes (Rpp1, Rpp2, Rpp3 and Rpp4) controlling resistance to ASR have been reported in the literature. To develop new long-lasting soybean ASR resistance genes, we used field experiments to assess ASR leaf lesion type in 11 soybean genotypes (BR01-18437, BRS 184, BRS 231, BRS 232, BRSGO Chapadões, DM 339, Embrapa 48, PI 200487, PI 230970, PI 459025-A and PI 200526) and the 55 F2 generations derived from their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Disease resistance; Genetic inheritance; Major genes; Phakopsora pachyrhizi. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300018 |
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| Ribeiro,Aliny Simony; Toledo,José Francisco Ferraz de; Arias,Carlos Alberto Arrabal; Godoy,Cláudia Vieira; Soares,Rafael Moreira; Moreira,José Ubirajara Vieira; Pierozzi,Pedro Henrique Braga; Vidigal,Maria Celeste Gonçalves; Oliveira,Marcelo Fernandes de. |
| Soybean is one of the most important crops in Brazil and continuously generates demands for production technologies, such as cultivars resistant to diseases. In recent years, the Asian rust fungus (Phakopsora pachyrhizi Syd. & P. Syd 1914) has caused severe yield losses and the development of resistant cultivars is the best means of control. Understanding the genetic control and estimating parameters associated with soybean (Glycine max) resistance to P. pachyrhizi will provide essential information for cultivar selection. We investigated quantitative genetic control of P. pachyrhizi and estimated parameters associated to soybean yield in the absence and presence of this phytopathogen. Six cultivars and their 15 diallel derived F2 and F3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic components; Genetic potential; Yield prediction. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100018 |
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| Laperuta,Larissa Di Cássia; Arias,Carlos Alberto Arrabal; Ribeiro,Aliny Simony; Rachid,Breno Francovig; Pierozzi,Pedro Henrique Braga; Toledo,José Francisco Ferraz de; Pípolo,Antonio Eduardo; Carneiro,Geraldo Estevam de Souza. |
| O objetivo deste estudo foi desenvolver testes de alelismo, inclusive cruzamentos entre um grupo de genótipos resistentes à ferrugem, do banco de germoplasma de soja da Embrapa, e as duas fontes de resistência com os genes Rpp2 e Rpp4. A ferrugem-asiática-da-soja, causada pelo fungo Phakopsora pachyrhizi, tem gerado perdas significativas na produtividade da cultura e preocupado os agricultores brasileiros. Até recentemente, existiam quatro genes de resistência descritos na literatura, mas somente Rpp2 e Rpp4 continuam efetivos no Brasil. Vinte e seis fontes com resistência a P. pachyrhizi foram cruzadas com PI 230970 e PI 459025 (fontes dos genes Rpp2 e Rpp4, respectivamente), e as plantas da geração F2 foram infectadas com uma suspensão com 2,5x10(4)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herança; Resistência vertical. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001200014 |
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