Data/hora: 11/06/2024 16:31:04

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Genetic variability of rice recurrent selection populations as affected by male sterility or manual recombination	
Autores: 	Pinheiro,Letícia da Silveira; Rangel,Paulo Hideo Nakano; Vianello,Rosana Pereira; Brondani,Claudio.	
Data: 	2012-06-01	
Ano: 	2012	
Palavras-chave: 	Oryza sativa; Allele variation; Rice breeding; Molecular markers; Population improvement.	
Resumo: 	The objective of this work was to determine the effect of male sterility or manual recombination on genetic variability of rice recurrent selection populations. The populations CNA-IRAT 4, with a gene for male sterility, and CNA 12, which was manually recombined, were evaluated. Genetic variability among selection cycles was estimated using14 simple sequence repeat (SSR) markers. A total of 926 plants were analyzed, including ten genitors and 180 individuals from each of the evaluated cycles (1, 2 and 5) of the population CNA-IRAT 4, and 16 genitors and 180 individuals from each of the cycles (1 and 2) of CNA 12. The analysis allowed the identification of alleles not present among the genitors for both populations, in all cycles, especially for the CNA-IRAT 4 population. These alleles resulted from unwanted fertilization with genotypes that were not originally part of the populations. The parameters of Wright's F-statistic (F IS and F IT) indicated that the manual recombination expands the genetic variability of the CNA 12 population, whereas male sterility reduces the one of CNA-IRAT 4.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000600011	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2012000600011	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.47 n.6 2012	
Fonte: 	info:eu-repo/semantics/openAccess