Data/hora: 02/06/2024 18:59:42

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Genetic variability of Brazilian rice landraces determined by SSR markers	
Autores: 	Borba,Tereza Cristina de Oliveira; Mendes,Clistiane dos Anjos; Guimarães,Élcio Perpétuo; Brunes,Tuliana Oliveira; Fonseca,Jaime Roberto; Brondani,Rosana Vianello; Brondani,Claudio.	
Data: 	2009-07-01	
Ano: 	2009	
Palavras-chave: 	Oryza sativa; Genotyping; Microsatellites; Participatory breeding; Rice breeding.	
Resumo: 	The objective of this study was to evaluate the genetic variability of rice (Oryza sativa) landraces collected in Brazilian small farms. Twelve simple sequence repeat (SSR) markers characterized 417 landraces collected in 1986, 1987 and 2003, in the state of Goiás, Brazil. The number of landraces with long and thin grain type increased in the evaluated period, probably due to market demand. Based on the molecular data, the genetic variability increased during this period and, as per to the factorial correspondence analysis, most of the accessions were grouped according to the year of collection. The incorporation of modern rice cultivars in landrace cultivation areas and the selection carried out by small farmers are the most probable factors responsible for increasing landrace genetic variability, during the evaluated period. Genotype exchange between farmers, selection practice and local environmental adaptation are able to generate novel adapted allele combinations, which can be used by breeding programs, to reinitiate the process.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700009	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2009000700009	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.44 n.7 2009	
Fonte: 	info:eu-repo/semantics/openAccess