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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
09/06/1993 |
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Data da última atualização: |
15/05/2007 |
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Autoria: |
TOLEDO, J. F. F. de. |
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Título: |
Quantitative genetics in soybean breeding. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Buenos Aires: AASOJA, 1989. |
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Páginas: |
p. 17. |
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Idioma: |
Inglês |
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Conteúdo: |
Hybridazation in the breeding programme of an autogamous species is usually decided on the basis of complementary qualitative characters. Whenever quantitative traits are involved a relatively high degree of randomness is involved in the observed results. Recently, however, a new methodology has been developed for predicting the breeding potential of a cross allowing a reliable preview of the outcome of a breeding programme still in its early days. It has been applied to a soybean breeding programme in Parana State, Brazil. The correlations between predicted and observd proportions of inbred lines outyielding the check cultivars (Parana and BR-5) and their average, for 17 biparental crosses among well adapted materials, were 0.74, 0.61 and 0.77, respectively. Selecting the best six crosses based on their predicted potential to generate inbred lines outyielding the mean of Parana and BR-5 resulted in picking those crosses that were 1st, 2nd, 3rd, 5th, 6th and 7th placed in actual breeding potential. It was concluded that the new methodology allowed the early selection ofpotent crosses. |
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Palavras-Chave: |
Brasil; Genetic; Parana; Soybean. |
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Thesagro: |
Genética; Melhoramento; Soja. |
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Thesaurus Nal: |
Brazil; breeding. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01715naa a2200241 a 4500
001 1449693
005 2007-05-15
008 1989 bl uuuu u00u1 u #d
100 1 $aTOLEDO, J. F. F. de
245 $aQuantitative genetics in soybean breeding.
260 $c1989
300 $ap. 17.
520 $aHybridazation in the breeding programme of an autogamous species is usually decided on the basis of complementary qualitative characters. Whenever quantitative traits are involved a relatively high degree of randomness is involved in the observed results. Recently, however, a new methodology has been developed for predicting the breeding potential of a cross allowing a reliable preview of the outcome of a breeding programme still in its early days. It has been applied to a soybean breeding programme in Parana State, Brazil. The correlations between predicted and observd proportions of inbred lines outyielding the check cultivars (Parana and BR-5) and their average, for 17 biparental crosses among well adapted materials, were 0.74, 0.61 and 0.77, respectively. Selecting the best six crosses based on their predicted potential to generate inbred lines outyielding the mean of Parana and BR-5 resulted in picking those crosses that were 1st, 2nd, 3rd, 5th, 6th and 7th placed in actual breeding potential. It was concluded that the new methodology allowed the early selection ofpotent crosses.
650 $aBrazil
650 $abreeding
650 $aGenética
650 $aMelhoramento
650 $aSoja
653 $aBrasil
653 $aGenetic
653 $aParana
653 $aSoybean
773 $tIn: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Buenos Aires: AASOJA, 1989.
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Embrapa Soja (CNPSO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
03/08/2004 |
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Data da última atualização: |
05/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FAGERIA, N. K.; BALIGAR, V. C. |
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Afiliação: |
NAND KUMAR FAGERIA, CNPAF. |
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Título: |
Lowland rice response to nitrogen fertilization. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, v. 32, n. 9/10, p. 1405-1429, 2001. |
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DOI: |
https://doi.org/10.1081/CSS-100104202 |
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Idioma: |
Inglês |
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Conteúdo: |
Nitrogen deficiency is one of the most important nutritional disorders in lowland rice producing areas around the world. Nitrogen fertilizer recommendations for lowland rice (Oryza sativa L.) varieties grown on Inceptisols are limited. The objective of this study was to evaluate the response of lowland rice (cv. Metica 1) to added N and to determine N use efficiency and nutrient accumulation during the crop growth cycle. A field experiment was conducted during 3 consecutive years in the central part of Brazil on a Haplaquept Inceptisol. Nitrogen levels used were 0, 30, 60, 90, 120,150, 180, and 210 kg N ha?1. Nitrogen fertilization significantly increased dry matter and grain yield. Ninty percent of the maximum grain yield (6400 kg ha-1) was obtained with the application of 120 kg N ha-1 in the first year of experimentation. In the second and third years, 90% of the maximum yields (6345 and 5203 kg ha-1) were obtained at 90 and 78 kg N ha-1, respectively. Yield components were also significantly affected by N treatments. Among yield components, panicle length and panicle number m 2 had highest correlations with grain yield (r=0.70** and 0.78**); maximum grain yield across the 3 years was achieved at about 583 panicles m 2. Dry matter production and grain yield at the highest N level (210 kg N ha-1) across the 3 years were 9423 and 6389 kg ha-1, respectively. At this grain + straw yield, the rice crop accumulated 139 kg N, 26 kg P, 218 kg K, 36 kg Ca, 24 kg Mg, 850 g Zn, 5971 g Mn, 125 g Cu, 4629 g Fe, and 104 g B. Nitrogen use efficiency defined in several ways, decreased with increasing N rates. Agronomic efficiency across 3 yeras averaged over N rates, was 23 kg of grain produced per kg of N applied. Physiological efficiency was 146 kg biological yield (grain + straw) produced per kg of N accumulated across the 3 year and N rates. Average agrophysiological efficiency was 63 kg grain produced per kg of N accumulated in the grains plus + straw. Apparent N recovery efficiency was 39% across the 3 years and N rates. Average nitrogen utilization efficiency was 58 kg of grain produced per kg N utilized by the rice crop. Soil pH and calcium concentration in the soil decreased significantly at higher N rates, whereas, soil Al3+ level was significantly increased after the harvest of the third rice crop. MenosNitrogen deficiency is one of the most important nutritional disorders in lowland rice producing areas around the world. Nitrogen fertilizer recommendations for lowland rice (Oryza sativa L.) varieties grown on Inceptisols are limited. The objective of this study was to evaluate the response of lowland rice (cv. Metica 1) to added N and to determine N use efficiency and nutrient accumulation during the crop growth cycle. A field experiment was conducted during 3 consecutive years in the central part of Brazil on a Haplaquept Inceptisol. Nitrogen levels used were 0, 30, 60, 90, 120,150, 180, and 210 kg N ha?1. Nitrogen fertilization significantly increased dry matter and grain yield. Ninty percent of the maximum grain yield (6400 kg ha-1) was obtained with the application of 120 kg N ha-1 in the first year of experimentation. In the second and third years, 90% of the maximum yields (6345 and 5203 kg ha-1) were obtained at 90 and 78 kg N ha-1, respectively. Yield components were also significantly affected by N treatments. Among yield components, panicle length and panicle number m 2 had highest correlations with grain yield (r=0.70** and 0.78**); maximum grain yield across the 3 years was achieved at about 583 panicles m 2. Dry matter production and grain yield at the highest N level (210 kg N ha-1) across the 3 years were 9423 and 6389 kg ha-1, respectively. At this grain + straw yield, the rice crop accumulated 139 kg N, 26 kg P, 218 kg K, 36 kg Ca, 24 kg Mg, 850 g Zn, 5971... Mostrar Tudo |
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Thesagro: |
Arroz; Fertilizante Nitrogenado; Nitrogênio; Oryza Sativa. |
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Thesaurus NAL: |
rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02950naa a2200205 a 4500
001 1212453
005 2022-04-05
008 2001 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1081/CSS-100104202$2DOI
100 1 $aFAGERIA, N. K.
245 $aLowland rice response to nitrogen fertilization.$h[electronic resource]
260 $c2001
520 $aNitrogen deficiency is one of the most important nutritional disorders in lowland rice producing areas around the world. Nitrogen fertilizer recommendations for lowland rice (Oryza sativa L.) varieties grown on Inceptisols are limited. The objective of this study was to evaluate the response of lowland rice (cv. Metica 1) to added N and to determine N use efficiency and nutrient accumulation during the crop growth cycle. A field experiment was conducted during 3 consecutive years in the central part of Brazil on a Haplaquept Inceptisol. Nitrogen levels used were 0, 30, 60, 90, 120,150, 180, and 210 kg N ha?1. Nitrogen fertilization significantly increased dry matter and grain yield. Ninty percent of the maximum grain yield (6400 kg ha-1) was obtained with the application of 120 kg N ha-1 in the first year of experimentation. In the second and third years, 90% of the maximum yields (6345 and 5203 kg ha-1) were obtained at 90 and 78 kg N ha-1, respectively. Yield components were also significantly affected by N treatments. Among yield components, panicle length and panicle number m 2 had highest correlations with grain yield (r=0.70** and 0.78**); maximum grain yield across the 3 years was achieved at about 583 panicles m 2. Dry matter production and grain yield at the highest N level (210 kg N ha-1) across the 3 years were 9423 and 6389 kg ha-1, respectively. At this grain + straw yield, the rice crop accumulated 139 kg N, 26 kg P, 218 kg K, 36 kg Ca, 24 kg Mg, 850 g Zn, 5971 g Mn, 125 g Cu, 4629 g Fe, and 104 g B. Nitrogen use efficiency defined in several ways, decreased with increasing N rates. Agronomic efficiency across 3 yeras averaged over N rates, was 23 kg of grain produced per kg of N applied. Physiological efficiency was 146 kg biological yield (grain + straw) produced per kg of N accumulated across the 3 year and N rates. Average agrophysiological efficiency was 63 kg grain produced per kg of N accumulated in the grains plus + straw. Apparent N recovery efficiency was 39% across the 3 years and N rates. Average nitrogen utilization efficiency was 58 kg of grain produced per kg N utilized by the rice crop. Soil pH and calcium concentration in the soil decreased significantly at higher N rates, whereas, soil Al3+ level was significantly increased after the harvest of the third rice crop.
650 $arice
650 $aArroz
650 $aFertilizante Nitrogenado
650 $aNitrogênio
650 $aOryza Sativa
700 1 $aBALIGAR, V. C.
773 $tCommunications in Soil Science and Plant Analysis$gv. 32, n. 9/10, p. 1405-1429, 2001.
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