Data/hora: 16/06/2024 06:03:01

Biblioteca(s): 	Embrapa Café.	
Data corrente: 	29/09/2020	
Data da última atualização: 	07/10/2020	
Autoria: 	MAIA, T. A.; MACEL-ZAMBOLIM, E.; CAIXETA, E. T.; MIZUBUTI, E. S. G.; ZAMBOLIM, L.	
Afiliação: 	T. A. MAIA, Departamento de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa; E. Maciel-Zambolim, Departamento de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa; EVELINE TEIXEIRA CAIXETA MOURA, CNPCa; E. S. G. Mizubuti, Departamento de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa; L. Zambolim, Departamento de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa.	
Título: 	The population structure of Hemileia vastatrix in Brazil inferred from AFLP.	
Ano de publicação: 	2013	
Fonte/Imprenta: 	Australasian Plant Pathology, v. 42, n. 5 , p. 533-542, 2013.	
DOI: 	https://10.1007/s13313-013-0213-3	
Idioma: 	Inglês	
Conteúdo: 	Efforts to obtain durable resistant cultivars to coffee leaf rust have a long history of disappointment because of the lack of information on the Hemileia vastatrix evolutionary potential. In this study, the AFLP marker was used to analyze the genetic structure of a field population of H. vastatrix from different coffee genotypes cultivated in a wide geographic region of Brazil?s main production areas. A total of 91 isolates were sampled from genotypes of Coffea arabica, C. canephora and Híbrido de Timor/Icatu derivatives. Each isolate exhibited unique multilocus AFLP genotypes with no identical isolates obtained from the same geographical and host origins. This finding was corroborated by a small correlation between genetic similarity and geographic distance (Rxy=0.31, P=0.23). The analyses showed a low genetic differentiation (GST=0.026) between the populations defined by a host and AMOVA analysis, most of the genetic variance (99.56 %) was attributed to differences within populations. In addition, based on the index of association (IA), the random mating possibility was not rejected (IA=0.225, P=0.123) for the population of H. vastatrix derived from C. canephora. This result suggested that H. vastatrix in Brazil behaves as a large undifferentiated population with a high level of genotypic diversity that is unstructured with regard to its geographic and host origins.	
Palavras-Chave: 	Coffee leaf rust; Durable resistance.	
Thesagro: 	Coffea Arábica; Coffea Canephora.	
Thesaurus Nal: 	Population genetics.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Café (CNPCa)	
Exemplares: 	CNPCa - (1444-1) - UPC - AP - DD -  -  -  - DIS