Data/hora: 27/07/2024 01:50:19

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Selection of alfalfa genotypes for resistance to the foliar pathogen Curvularia geniculata	
Autores: 	ÁVILA,MARIANA R.; DALL’AGNOL,MIGUEL; MARTINELLI,JOSÉ A.; SILVA,GERARDA B.P. DA; BREMM,CAROLINA; NUNES,TAMYRIS.	
Data: 	2017-09-01	
Ano: 	2017	
Palavras-chave: 	Lucerne; Invasive plants; Foliar pathogen; Forage legumes.	
Resumo: 	ABSTRACT Foliar diseases impose severe restrictions on the persistence and productivity of Medicago sativa, both of which may be increased by developing disease resistant and more competitive genotypes that can improve pasture quality. We found Curvularia geniculata as the principal alfalfa foliar pathogen in the Brazilian state of Rio Grande do Sul (RS). Growth chamber experiments evaluated the resistance of alfalfa genotypes ‘E1C4’, ‘CPPSul’, ‘ABT 805’ and ‘CUF-101’ to C. geniculata as compared the control ‘Crioula’ genotype. These genotypes were also evaluated in field trials at a sea level site in Eldorado do Sul in central RS and at two sites £200 m above sea level, one in Bagé municipality in south west RS and the other at a farm near the town of Alto Feliz in north east RS. Plants were spray-inoculated with 1.6 x 106 ml-1 of C. geniculata spores and visually evaluated for leaf damage 14 days later. The C. geniculata infection rates varied from zero to 100%. Alfalfa persistence and forage mean dry mass (DM) production at the Eldorado site were measured during different seasons from November 2013 to January 2015 by calculating the incidence of invasive plants and morphologically separating leaves from stems and calculating both leaf and stem DM. Data were analysed using mixed statistical models. The best results for persistence and forage DM were shown by the ‘CPPSul’ genotypes (DM = 16,600 kg ha-1) and ‘Crioula’ (DM = 15,750 kg ha-1). These two genotypes will be used for subsequent investigations and selection cycles.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401801	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201720170005	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.89 n.3 2017	
Fonte: 	info:eu-repo/semantics/openAccess