Data/hora: 23/09/2024 02:13:57

Biblioteca(s): 	Embrapa Café.	
Data corrente: 	18/10/2011	
Data da última atualização: 	18/10/2011	
Autoria: 	MISSIO, R. F.; CAIXETA, E. T.; ZAMBOLIM, E. M.; PENA, G. F.; ZAMBOLIM, L.; DIAS, L. A. S.; SAKIYAMA, N. S.	
Afiliação: 	Universidade Federal do Paraná; EVELINE TEIXEIRA CAIXETA, SAPC; BioCafé; BioCafé; BioCafé; UFV; BioCafé/UFV.	
Título: 	Genetic characterization of an elite coffee germplasm assessed by gSSR and EST-SSR markers.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	Genetics and Molecular Research, v. 10, n. 4, p 2366-2381, 2011.	
Idioma: 	Inglês	
Conteúdo: 	Coffee is one of the main agrifood commodities traded worldwide. In 2009, coffee accounted for 6.1% of the value of Brazilian agricultural production, generating a revenue of US$6 billion. Despite the importance of coffee production in Brazil, it is supported by a narrow genetic base, with few accessions. Molecular differentiation and diversity of a coffee breeding program were assessed with gSSR and EST-SSR markers. The study comprised 24 coffee accessions according to their genetic origin: arabica accessions (six traditional genotypes of C. arabica), resistant arabica (six leaf rust-resistant C. arabica genotypes with introgression of Híbrido de Timor), robusta (five C. canephora genotypes), Híbrido de Timor (three C. arabica x C. canephora), triploids (three C. arabica x C. racemosa), and racemosa (one C. racemosa). Allele and polymorphism analysis, AMOVA, the Student t-test, Jaccard?s dissimilarity coefficient, cluster analysis, correlation of genetic distances, and discriminant analysis, were performed. EST-SSR markers gave 25 exclusive alleles per genetic group, while gSSR showed 47, which will be useful for differentiating accessions and for fingerprinting varieties. The gSSR markers detected a higher percentage of polymorphism among (35% higher on average) and within (42.9% higher on average) the genetic groups, compared to EST-SSR markers. The highest percentage of polymorphism within the genetic groups was found with gSSR markers for robusta (89.2%) and for resistant arabica (39.5%). It was possible to differentiate all genotypes including the arabica-related accessions. Nevertheless, combined use of gSSR and EST-SSR markers is recommended for coffee molecular characterization, because EST-SSRs can provide complementary information.	
Palavras-Chave: 	Genetic diversity; Microsatellite marker.	
Thesaurus Nal: 	Coffea; Discriminant analysis.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/43671/1/Genetic-characterization-of-an-elite-coffee.pdf	
Registro original: 	Embrapa Café (CNPCa)	
Exemplares: 	CNPCa - (294-1) - UPC - AP - DD -  -  -  - DIS