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| Registros recuperados : 167 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
25/02/2008 |
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Data da última atualização: |
02/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RANGEL, P. N.; BRONDANI, R. P. V.; RANGEL, P. H. N.; BRONDANI, C. |
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Afiliação: |
PRISCILA NASCIMENTO RANGEL; ROSANA PEREIRA VIANELLO, CNPAF; PAULO HIDEO NAKANO RANGEL, CNPAF; CLAUDIO BRONDANI, CNPAF. |
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Título: |
Agronomic and molecular characterization of introgression lines from the interspecific cross Oryza sativa (BG90-2) x Oryza glumaepatula (RS-16). |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 7, n. 1, p. 184-195, Feb. 2008. |
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DOI: |
https://doi.org/10.4238/vol7-1gmr406 |
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Idioma: |
Inglês |
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Conteúdo: |
The reduced genetic variability of modern rice varieties (Oryza sativa) is of concern because it reduces the possibilities of genetic gain in breeding programs. Introgression lines (ILs) containing genomic fragments from wild rice can be used to obtain new improved cultivars. The objective of the present study was to perform the agronomic and molecular characterizations of 35 BC2F8 ILs from the cross O. glumaepatula x O. sativa, aiming to select high-yielding ILs to be used in rice-breeding programs. All 35 ILs were field evaluated in the season 2002/2003 in three locations and the 15 best performing ones were evaluated in the season 2003/2004 in five locations. In 2003/2004, six ILs (CNAi 9934, CNAi 9931, CNAi 9930, CNAi 9935, CNAi 9936, and CNAi 9937) showed the highest yield means and were statistically superior to the controls Metica 1 and IRGA 417. Molecular characterization of the 35 ILs was performed with 92 microsatellite markers distributed on the 12 rice chromosomes and a simple regression quantitative trait locus analysis was performed using the phenotypic data from 2002/2003. The six high-yielding ILs showed a low proportion of wild fragment introgressions. A total of 14 molecular markers were associated with quantitative trait loci in the three locations. The six high-yielding ILs were incorporated in the Embrapa breeding program, and the line CNAi 9930 is recommended for cultivation due to additional advantages of good grain cooking and milling qualities and high yield stability. The O. glumaepatula-derived ILs proved to be a source of new alleles for the development of high-yielding rice cultivars. MenosThe reduced genetic variability of modern rice varieties (Oryza sativa) is of concern because it reduces the possibilities of genetic gain in breeding programs. Introgression lines (ILs) containing genomic fragments from wild rice can be used to obtain new improved cultivars. The objective of the present study was to perform the agronomic and molecular characterizations of 35 BC2F8 ILs from the cross O. glumaepatula x O. sativa, aiming to select high-yielding ILs to be used in rice-breeding programs. All 35 ILs were field evaluated in the season 2002/2003 in three locations and the 15 best performing ones were evaluated in the season 2003/2004 in five locations. In 2003/2004, six ILs (CNAi 9934, CNAi 9931, CNAi 9930, CNAi 9935, CNAi 9936, and CNAi 9937) showed the highest yield means and were statistically superior to the controls Metica 1 and IRGA 417. Molecular characterization of the 35 ILs was performed with 92 microsatellite markers distributed on the 12 rice chromosomes and a simple regression quantitative trait locus analysis was performed using the phenotypic data from 2002/2003. The six high-yielding ILs showed a low proportion of wild fragment introgressions. A total of 14 molecular markers were associated with quantitative trait loci in the three locations. The six high-yielding ILs were incorporated in the Embrapa breeding program, and the line CNAi 9930 is recommended for cultivation due to additional advantages of good grain cooking and milling qualities and hi... Mostrar Tudo |
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Palavras-Chave: |
Caracterização molecular; Introgression lines; Oryza glumaepatula; Simple sequence repeat markers. |
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Thesagro: |
Arroz; Oryza Sativa. |
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Thesaurus NAL: |
rice. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/216125/1/gmr.pdf
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Marc: |
LEADER 02486naa a2200253 a 4500
001 1216125
005 2022-06-02
008 2008 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/vol7-1gmr406$2DOI
100 1 $aRANGEL, P. N.
245 $aAgronomic and molecular characterization of introgression lines from the interspecific cross Oryza sativa (BG90-2) x Oryza glumaepatula (RS-16).$h[electronic resource]
260 $c2008
520 $aThe reduced genetic variability of modern rice varieties (Oryza sativa) is of concern because it reduces the possibilities of genetic gain in breeding programs. Introgression lines (ILs) containing genomic fragments from wild rice can be used to obtain new improved cultivars. The objective of the present study was to perform the agronomic and molecular characterizations of 35 BC2F8 ILs from the cross O. glumaepatula x O. sativa, aiming to select high-yielding ILs to be used in rice-breeding programs. All 35 ILs were field evaluated in the season 2002/2003 in three locations and the 15 best performing ones were evaluated in the season 2003/2004 in five locations. In 2003/2004, six ILs (CNAi 9934, CNAi 9931, CNAi 9930, CNAi 9935, CNAi 9936, and CNAi 9937) showed the highest yield means and were statistically superior to the controls Metica 1 and IRGA 417. Molecular characterization of the 35 ILs was performed with 92 microsatellite markers distributed on the 12 rice chromosomes and a simple regression quantitative trait locus analysis was performed using the phenotypic data from 2002/2003. The six high-yielding ILs showed a low proportion of wild fragment introgressions. A total of 14 molecular markers were associated with quantitative trait loci in the three locations. The six high-yielding ILs were incorporated in the Embrapa breeding program, and the line CNAi 9930 is recommended for cultivation due to additional advantages of good grain cooking and milling qualities and high yield stability. The O. glumaepatula-derived ILs proved to be a source of new alleles for the development of high-yielding rice cultivars.
650 $arice
650 $aArroz
650 $aOryza Sativa
653 $aCaracterização molecular
653 $aIntrogression lines
653 $aOryza glumaepatula
653 $aSimple sequence repeat markers
700 1 $aBRONDANI, R. P. V.
700 1 $aRANGEL, P. H. N.
700 1 $aBRONDANI, C.
773 $tGenetics and Molecular Research$gv. 7, n. 1, p. 184-195, Feb. 2008.
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Embrapa Arroz e Feijão (CNPAF) |
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