Data/hora: 03/06/2024 18:21:20

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Mapping of quantitative trait loci for thermosensitive genic male sterility in indica rice	
Autores: 	Alcochete,Antonio Alberto Neves de; Rangel,Paulo Hideo Nakano; Ferreira,Marcio Elias.	
Data: 	2005-12-01	
Ano: 	2005	
Palavras-chave: 	Oryza sativa; Microsatellite; Hybrid rice; Genetic map.	
Resumo: 	The objective of this work was to select and use microsatellite markers, to map genomic regions associated with the genetic control of thermosensitive genic male sterility (TGMS) in rice. An F2 population, derived from the cross between fertile and TGMS indica lines, was used to construct a microsatellite-based genetic map of rice. The TGMS phenotype showed a continuous variation in the segregant population. A low level of segregation distortion was detected in the F2 (14.65%), whose cause was found to be zygotic selection. There was no evidence suggesting a cause-effect relationship between zygotic selection and the control of TGMS in this cross. A linkage map comprising 1,213.3 cM was constructed based on the segregation data of the F2 population. Ninety-five out of 116 microsatellite polymorphic markers were assembled into 11 linkage groups, with an average of 12.77 cM between two adjacent marker loci. The phenotypic and genotypic data allowed for the identification of three new quantitative trait loci (QTL) for thermosensitive genic male sterility in indica rice. Two of the QTL were mapped on chromosomes that, so far, have not been associated with the genetic control of the TGMS trait (chromosomes 1 and 12). The third QTL was mapped on chromosome 7, where a TGMS locus (tms2) has recently been mapped. Allelic tests will have to be developed, in order to clarify if the two regions are the same or not.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005001200004	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2005001200004	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.40 n.12 2005	
Fonte: 	info:eu-repo/semantics/openAccess