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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
04/11/1997 |
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Data da última atualização: |
11/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BORRERO, J. C.; PANDEY, S.; CEBALLOS, H.; MAGNAVACA, R.; BAHIA FILHO, A. F. C. |
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Afiliação: |
EMBRAPA/CNPMS. |
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Título: |
Genetic variances for tolerance to soil acidity in a tropical maize population. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Maydica, Bergamo, v. 40, n. 3, p. 283-288, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil acidity reduces yield on approximately 10% of the maize (Zea mays L.) area in developing countries. Information on the inheritance of acid-soil tolerance would help scientists chose more appropriate methods for efficient breeding of tolerant cultivars. We used a North Carolina Design II mating system to study the relative importance of additive (VA) and dominante (VD) variances and their interactions with environments in the 'SA-4' tropical maize population. One-hundred-sixty S1 lines were randomly assigned to 20 sets of eight lines. Within each set, four lines were arbitrarly designated as males and four as females. Each male was crossed with each female in the et, providing 16 full-sib familes. The 20 sets, with 16 full-sib families each, were field-planted in two replications in one non-acid- and four acid-soil environments during 1992 in Colombia and Brazil. Across acid soils, VD was significantly greater than VA for yield (0.22 vs. 0.09) and days to silk (2.33 vs. 1.35) and lower for ear height (23.93 vs. 37.48), ears/plant (0.0013 vs. 0.0018), and ear rot (4.86 vs. 13.68). Heritabilities, based on half-sib family means, averaged 0.39+/-0.14 for yield, 0,43+/-0.14 for days to silk, 0.66+/-0.13 for ear height, 0,47+/-0.14 for ears plant-1, and 0,48+/-0.14 for ear rot across the acid-soil environments. Magnitudes of VA and VD and their interactions with environments indicated that reciprocal recurrent selection, using multilocation testing would be effective for developing improved maize cultivars (...) MenosSoil acidity reduces yield on approximately 10% of the maize (Zea mays L.) area in developing countries. Information on the inheritance of acid-soil tolerance would help scientists chose more appropriate methods for efficient breeding of tolerant cultivars. We used a North Carolina Design II mating system to study the relative importance of additive (VA) and dominante (VD) variances and their interactions with environments in the 'SA-4' tropical maize population. One-hundred-sixty S1 lines were randomly assigned to 20 sets of eight lines. Within each set, four lines were arbitrarly designated as males and four as females. Each male was crossed with each female in the et, providing 16 full-sib familes. The 20 sets, with 16 full-sib families each, were field-planted in two replications in one non-acid- and four acid-soil environments during 1992 in Colombia and Brazil. Across acid soils, VD was significantly greater than VA for yield (0.22 vs. 0.09) and days to silk (2.33 vs. 1.35) and lower for ear height (23.93 vs. 37.48), ears/plant (0.0013 vs. 0.0018), and ear rot (4.86 vs. 13.68). Heritabilities, based on half-sib family means, averaged 0.39+/-0.14 for yield, 0,43+/-0.14 for days to silk, 0.66+/-0.13 for ear height, 0,47+/-0.14 for ears plant-1, and 0,48+/-0.14 for ear rot across the acid-soil environments. Magnitudes of VA and VD and their interactions with environments indicated that reciprocal recurrent selection, using multilocation testing would be effective for deve... Mostrar Tudo |
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Thesagro: |
Milho. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02057naa a2200181 a 4500
001 1477166
005 2018-06-11
008 1995 bl uuuu u00u1 u #d
100 1 $aBORRERO, J. C.
245 $aGenetic variances for tolerance to soil acidity in a tropical maize population.$h[electronic resource]
260 $c1995
520 $aSoil acidity reduces yield on approximately 10% of the maize (Zea mays L.) area in developing countries. Information on the inheritance of acid-soil tolerance would help scientists chose more appropriate methods for efficient breeding of tolerant cultivars. We used a North Carolina Design II mating system to study the relative importance of additive (VA) and dominante (VD) variances and their interactions with environments in the 'SA-4' tropical maize population. One-hundred-sixty S1 lines were randomly assigned to 20 sets of eight lines. Within each set, four lines were arbitrarly designated as males and four as females. Each male was crossed with each female in the et, providing 16 full-sib familes. The 20 sets, with 16 full-sib families each, were field-planted in two replications in one non-acid- and four acid-soil environments during 1992 in Colombia and Brazil. Across acid soils, VD was significantly greater than VA for yield (0.22 vs. 0.09) and days to silk (2.33 vs. 1.35) and lower for ear height (23.93 vs. 37.48), ears/plant (0.0013 vs. 0.0018), and ear rot (4.86 vs. 13.68). Heritabilities, based on half-sib family means, averaged 0.39+/-0.14 for yield, 0,43+/-0.14 for days to silk, 0.66+/-0.13 for ear height, 0,47+/-0.14 for ears plant-1, and 0,48+/-0.14 for ear rot across the acid-soil environments. Magnitudes of VA and VD and their interactions with environments indicated that reciprocal recurrent selection, using multilocation testing would be effective for developing improved maize cultivars (...)
650 $aMilho
700 1 $aPANDEY, S.
700 1 $aCEBALLOS, H.
700 1 $aMAGNAVACA, R.
700 1 $aBAHIA FILHO, A. F. C.
773 $tMaydica, Bergamo$gv. 40, n. 3, p. 283-288, 1995.
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Embrapa Milho e Sorgo (CNPMS) |
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
30/07/2013 |
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Data da última atualização: |
07/04/2016 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
CARVALHO, C. H. S. de; PAIVA, A. C. R. dos S.; SILVA, E. Q.; CUSTÓDIO, A. A. |
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Afiliação: |
CARLOS HENRIQUE S DE CARVALHO, SAPC; ANA CAROLINA RAMIA DOS SANTOS PAIVA; ELIZANI QUINTINO SILVA, Bolsista; ALINE APARECIDA CUSTÓDIO, Bosista. |
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Título: |
Custo de produção de mudas clonais de Café Arábica produzidas por Embriogênese Somática. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Brasília, DF: Embrapa Café, 2013 |
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Páginas: |
10 p. |
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Série: |
(Embrapa Café. Circular técnica, 3). |
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ISSN: |
2317-2029 |
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Idioma: |
Português |
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Conteúdo: |
A espécie Coffea arabica L. é considerada autógama, com cerca de 10 a 15% de fecundação cruzada, sendo comercialmente propagada por sementes. O melhoramento genético dessa espécie requer até 30 anos de trabalho para que uma nova cultivar com características agronômicas geneticamente estáveis seja liberada para plantio comercial. Isso acontece porque são despendidos pelo menos seis anos para avaliar uma geração e de ser necessário selecionar pelo menos mais cinco gerações após a obtenção do híbrido F1. |
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Palavras-Chave: |
Café arábica; Melhoramento genético. |
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Thesagro: |
Café; Coffea Arábica. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/86768/1/Custo-de-producao-de-mudas.pdf
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Marc: |
LEADER 01194nam a2200229 a 4500
001 1963023
005 2016-04-07
008 2013 bl uuuu u0uu1 u #d
022 $a2317-2029
100 1 $aCARVALHO, C. H. S. de
245 $aCusto de produção de mudas clonais de Café Arábica produzidas por Embriogênese Somática.
260 $aBrasília, DF: Embrapa Café$c2013
300 $a10 p.
490 $a(Embrapa Café. Circular técnica, 3).
520 $aA espécie Coffea arabica L. é considerada autógama, com cerca de 10 a 15% de fecundação cruzada, sendo comercialmente propagada por sementes. O melhoramento genético dessa espécie requer até 30 anos de trabalho para que uma nova cultivar com características agronômicas geneticamente estáveis seja liberada para plantio comercial. Isso acontece porque são despendidos pelo menos seis anos para avaliar uma geração e de ser necessário selecionar pelo menos mais cinco gerações após a obtenção do híbrido F1.
650 $aCafé
650 $aCoffea Arábica
653 $aCafé arábica
653 $aMelhoramento genético
700 1 $aPAIVA, A. C. R. dos S.
700 1 $aSILVA, E. Q.
700 1 $aCUSTÓDIO, A. A.
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Embrapa Café (CNPCa) |
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