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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio-Norte. Para informações adicionais entre em contato com cpamn.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Meio-Norte. |
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Data corrente: |
05/05/2017 |
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Data da última atualização: |
18/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MORAIS JÚNIOR, O. P. de; PEREIRA, J. A.; MELO, P. G. S.; GUIMARÃES, P. H. R.; MORAIS, O. P. de. |
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Afiliação: |
ODILON PEIXOTO DE MORAIS JÚNIOR, UFG; JOSE ALMEIDA PEREIRA, CPAMN; PATRÍCIA GUIMARÃES SANTOS MELO, UFG; PAULO HENRIQUE RAMOS GUIMARÃES, UFG; ORLANDO PEIXOTO DE MORAIS, CNPAF. |
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Título: |
Gene action and combining ability for certain agronomic traits in red rice lines and commercial cultivars. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Crop Science, v. 57, p. 1-13, May/Jun. 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Cultivated red rice (Oryza sativa L.) is the most important special type of rice in Brazil and makes an excellent food, mainly because of its nutritional value. Genetic variability, useful for rice breeding programs, exists among red rice accessions. The objectives of the present study were: (i) to determine the nature of gene action and magnitude of genetic components conditioning grain yield (GY), plant height (PH), and days to flowering (DTF); and (ii) to determine the combining ability for these traits in nine red rice lines (female parents) and four commercial cultivars (male parents). Thirteen parents, an F2 generation of 18 crosses, and a check cultivar were evaluated at two locations (Goianira and Teresina, Brazil) using a randomized complete block design with four replications. Data (unbalanced because of lost plots) from this incomplete set of crosses in a factorial mating design were subjected to variance analyses using a general linear model. According to Baker?s ratio, nonadditive genetic effects were more important than additive effects for the expression of the three traits. The dominance deviations were predominantly negative for GY and DTF and were positive for PH. Crosses tended to be more productive (higher GY) and earlier (fewer DTF) than parental lines. General combining ability was largest for the MNA1106 line with red pericarp. The MNA1106/SCS 119 Rubi cross exhibited the highest potential for selection of high-yielding red rice lines. MNA1101/SCS 119 Rubi, MNA1101/SCS 116 Satoru, MNA1102/SCS 119 Rubi, MNA1103/IRGA 424, MNA1104/SCS 116 Satoru, and MNA1108/IRGA 424 crosses were considered the most promising sources of earliness for developing early-maturing red rice lines. MenosCultivated red rice (Oryza sativa L.) is the most important special type of rice in Brazil and makes an excellent food, mainly because of its nutritional value. Genetic variability, useful for rice breeding programs, exists among red rice accessions. The objectives of the present study were: (i) to determine the nature of gene action and magnitude of genetic components conditioning grain yield (GY), plant height (PH), and days to flowering (DTF); and (ii) to determine the combining ability for these traits in nine red rice lines (female parents) and four commercial cultivars (male parents). Thirteen parents, an F2 generation of 18 crosses, and a check cultivar were evaluated at two locations (Goianira and Teresina, Brazil) using a randomized complete block design with four replications. Data (unbalanced because of lost plots) from this incomplete set of crosses in a factorial mating design were subjected to variance analyses using a general linear model. According to Baker?s ratio, nonadditive genetic effects were more important than additive effects for the expression of the three traits. The dominance deviations were predominantly negative for GY and DTF and were positive for PH. Crosses tended to be more productive (higher GY) and earlier (fewer DTF) than parental lines. General combining ability was largest for the MNA1106 line with red pericarp. The MNA1106/SCS 119 Rubi cross exhibited the highest potential for selection of high-yielding red rice lines. MNA1101/SCS 119 ... Mostrar Tudo |
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Palavras-Chave: |
Melhoramento genético. |
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Thesagro: |
Arroz; Arroz Vermelho; Melhoramento genético vegetal; Oryza sativa; Variedade. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02457naa a2200241 a 4500
001 2069249
005 2022-05-18
008 2017 bl uuuu u00u1 u #d
100 1 $aMORAIS JÚNIOR, O. P. de
245 $aGene action and combining ability for certain agronomic traits in red rice lines and commercial cultivars.$h[electronic resource]
260 $c2017
520 $aCultivated red rice (Oryza sativa L.) is the most important special type of rice in Brazil and makes an excellent food, mainly because of its nutritional value. Genetic variability, useful for rice breeding programs, exists among red rice accessions. The objectives of the present study were: (i) to determine the nature of gene action and magnitude of genetic components conditioning grain yield (GY), plant height (PH), and days to flowering (DTF); and (ii) to determine the combining ability for these traits in nine red rice lines (female parents) and four commercial cultivars (male parents). Thirteen parents, an F2 generation of 18 crosses, and a check cultivar were evaluated at two locations (Goianira and Teresina, Brazil) using a randomized complete block design with four replications. Data (unbalanced because of lost plots) from this incomplete set of crosses in a factorial mating design were subjected to variance analyses using a general linear model. According to Baker?s ratio, nonadditive genetic effects were more important than additive effects for the expression of the three traits. The dominance deviations were predominantly negative for GY and DTF and were positive for PH. Crosses tended to be more productive (higher GY) and earlier (fewer DTF) than parental lines. General combining ability was largest for the MNA1106 line with red pericarp. The MNA1106/SCS 119 Rubi cross exhibited the highest potential for selection of high-yielding red rice lines. MNA1101/SCS 119 Rubi, MNA1101/SCS 116 Satoru, MNA1102/SCS 119 Rubi, MNA1103/IRGA 424, MNA1104/SCS 116 Satoru, and MNA1108/IRGA 424 crosses were considered the most promising sources of earliness for developing early-maturing red rice lines.
650 $aArroz
650 $aArroz Vermelho
650 $aMelhoramento genético vegetal
650 $aOryza sativa
650 $aVariedade
653 $aMelhoramento genético
700 1 $aPEREIRA, J. A.
700 1 $aMELO, P. G. S.
700 1 $aGUIMARÃES, P. H. R.
700 1 $aMORAIS, O. P. de
773 $tCrop Science$gv. 57, p. 1-13, May/Jun. 2017.
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