Data/hora: 06/06/2024 08:08:19

Provedor de dados: 	63	
País: 	Brazil	
Título: 	Characterization of type and genetic diversity among soybean cyst nematode differentiators	
Autores: 	Matsuo,Éder; Sediyama,Tuneo; Oliveira,Rosângela D'Arc de Lima; Cruz,Cosme Damião; Oliveira,Rita de Cássia Teixeira.	
Data: 	2012-04-01	
Ano: 	2012	
Palavras-chave: 	Glycine max; Heterodera glycines; Soybean breeding; Resistant cultivars.	
Resumo: 	The development of soybean cyst nematode, Heterodera glycines Ichinohe, resistant genotypes with high yields has been one of the objectives of soybean (Glycine max (L.) Merrill) breeding programs. The objective of this study was to characterize the pathotype of soybean cyst nematodes and analyze the genetic diversity of ten differentiator lines ('Lee 74', Peking, Pickett, PI 88788, PI 90763, PI 437654, PI 209332, PI 89772, PI 548316 and 'Hartwig'). Inoculum was obtained from plants cultivated in field soil in Viçosa, state of Minas Gerais, Brazil. Thirty-four days after inoculating each plant with 4,000 eggs, the number of females, female index, total number of eggs, number of eggs per female, reproduction factor, plant height, number of nodes, fresh and dry matter weights were assessed. The differential lines were first grouped with Scott-Knott test. Subsequently, the genetic diversity was evaluated using dendrograms, graphic analysis and the Tocher grouping method. The inoculum of H. glycines obtained from NBSGBP-UFV was characterized as HG Type 0. The differentiating lines were divergent, and PI 89772, PI 437654, 'Hartwig' and 'Peking' had the greatest potential for use in breeding programs.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000200010	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162012000200010	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.69 n.2 2012	
Fonte: 	info:eu-repo/semantics/openAccess