Data/hora: 09/06/2024 02:50:34

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Unidades Centrais.
Data corrente: | 23/01/2006
Data da última atualização: | 14/05/2022
Autoria: | ALCOCHETE, A. A. N. de; RANGEL, P. H. N.; FERREIRA, M. E.
Afiliação: | ANTONIO ALBERTO NEVES DE ALCOCHETE, UNIVERSIDADE AGOSTINHO NETO, Luanda-Angola; PAULO HIDEO NAKANO RANGEL, CNPAF; MARCIO ELIAS FERREIRA, Cenargen.
Título: | Mapping of quantitative trait loci for thermosensitive genic male sterility in indica rice.
Ano de publicação: | 2005
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, v. 40, n. 12, p. 1179-1188, dez. 2005.
Idioma: | Inglês
Conteúdo: | 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.
Palavras-Chave: | arroz híbrido; genetic map; Hybrid; hybrid rice; mapa genético; Microsatélite; microsatellite; microssatélite.
Thesagro: | Arroz; Melhoramento Genético Vegetal; Oryza Sativa.
Thesaurus Nal: | rice.

Categoria do assunto:

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G Melhoramento Genético

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/33855/1/40n12a04.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

AI-SEDE - (33855-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CENARGEN - (27815-1) - UPC - AP - DD - SP 19157 -  - 19157 - DIS
CNPAF - (23186-1) - UPC - AP - PP - 2005 -  - 2005 - DIS