Data/hora: 02/06/2024 11:44:29

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	20/08/2003	
Data da última atualização: 	25/10/2018	
Autoria: 	GRAVINA, G. de A.; SEDIYAMA, C. S.; MARTINS FILHO, S.; MOREIRA, M. A.; BARROS, E. G. de.	
Afiliação: 	Geraldo de Amaral Gravina, Universidade Federal de Viçosa - UFV/Departamento de Fitotecnia; Carlos Sigueyuki Sediyama, Universidade Federal de Viçosa - UFV/Departamento de Fitotecnia; Sebastião Martins Filho, Universidade Federal do Espírito Santo - UFES/Departamento de Engenharia Rural; Maurílio Alves Moreira, Universidade Federal de Viçosa - UFV/Departamento de Bioquímica e Biologia Molecular; Everaldo Gonçalves de Barros, Universidade Federal de Viçosa - UFV/Departamento de Biologia Geral.	
Título: 	Diallel analysis for frogeye leaf spot resistance in soybean.	
Ano de publicação: 	2003	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 6, p. 673-680, jun. 2003	
Idioma: 	Inglês	
Notas: 	Título em português: Análise dialélica da resistência à mancha olho-de-rã em soja.	
Conteúdo: 	Seven soybean cultivars (Bossier, Cristalina, Davis, Kent, Lincoln, Paraná and Uberaba), with different levels of resistance to Cercospora sojina, were crossed in a diallel design to determine the general (GCA) and specific (SCA) combining abilities relative to the inheritance of the resistance. Race 04 of the fungus was inoculated in the parents and in the 21 F1 hybrids in a greenhouse in a completely randomized design, with 12 replications. The reactions to the disease were evaluated 20 days after the inoculation, always on the most infected leaflet. Both GCA and SCA were significant for all the evaluated characters, being inferred that, for the expression of the characters, the additive, dominant and, possibly, epistatic genic actions were important. The largest values of estimated SCA effectwere observed in the hybrid combinations where at least one parent presented high GCA. Cristalina, Davis and Uberaba cultivars showed the largest estimates for GCA effect (), and from the analysis of , the contribution of these parents to heterosis of their hybrids will be towards the reduction of the disease symptoms. Therefore, these cultivars are indicated as parents in breeding programs that seek the development of soybean cultivars with resistance to frogeye leaf spot.	
Palavras-Chave: 	capacidade combinatória; combining ability; genetic parameters; heterose.	
Thesagro: 	Cercospora Sojina; Glycine Max; Parâmetro Genético; Resistência Genética.	
Thesaurus Nal: 	genetic resistance; heterosis.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/24777/1/v38n6a02.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (24777-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS