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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
24/05/1996 |
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Data da última atualização: |
24/05/1996 |
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Autoria: |
SPEHAR, C. R.; GALWEY, N. W. |
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Título: |
Diallel analysis for aluminium tolerance in tropical soybeans [Glycine max (L.) Merrill]. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Theoretical and Applied Genetics, New York, v.92, p.267-272, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
The soybean is a major crop in the agricultural systems of the Brazilian Cerrados (Savannahs), whose soils are acidic, devoid of nutrients and need to be amended before they are cultivated. However, below the ploughed layer there is a scarcity of nutrients and toxic aluminium (Al). These limit root growth, subsequently causing nutritional imbalance and drought stress. Our aim in the investigation described here was to identify genetic differences in the aluminium tolerance of soybeans by a 9 x 9 diallel cross among contrasting varieties grown in high-Al areas and in hydroponics. Combining ability analysis indicated predominantly additive gene effects, and the additive-dominance model explained most of the genetic differences in this germplasm for mineral element absorption and root growth under aluminium stress. The relationship between the two factors suggest that conjugation hydroponies and field evaluations in breeding programmes would further improve soybeans with respect to yield stability under tropical cultivation conditions. |
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Palavras-Chave: |
Aluminium; Cultivar; Diallel crossing; Genetic inheritance; Tolerance; Tolerancia. |
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Thesagro: |
Alumínio; Cerrado; Cruzamento Dialélico; Cultivo Hidropônico; Glycine Max; Hereditariedade; Melhoramento Genético Vegetal; Nutriente; Soja; Solo Ácido. |
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Thesaurus Nal: |
acid soils; hydroponics; nutrients; plant breeding; soybeans; varieties. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02100naa a2200397 a 4500
001 1551702
005 1996-05-24
008 1996 bl --- 0-- u #d
100 1 $aSPEHAR, C. R.
245 $aDiallel analysis for aluminium tolerance in tropical soybeans [Glycine max (L.) Merrill].
260 $c1996
520 $aThe soybean is a major crop in the agricultural systems of the Brazilian Cerrados (Savannahs), whose soils are acidic, devoid of nutrients and need to be amended before they are cultivated. However, below the ploughed layer there is a scarcity of nutrients and toxic aluminium (Al). These limit root growth, subsequently causing nutritional imbalance and drought stress. Our aim in the investigation described here was to identify genetic differences in the aluminium tolerance of soybeans by a 9 x 9 diallel cross among contrasting varieties grown in high-Al areas and in hydroponics. Combining ability analysis indicated predominantly additive gene effects, and the additive-dominance model explained most of the genetic differences in this germplasm for mineral element absorption and root growth under aluminium stress. The relationship between the two factors suggest that conjugation hydroponies and field evaluations in breeding programmes would further improve soybeans with respect to yield stability under tropical cultivation conditions.
650 $aacid soils
650 $ahydroponics
650 $anutrients
650 $aplant breeding
650 $asoybeans
650 $avarieties
650 $aAlumínio
650 $aCerrado
650 $aCruzamento Dialélico
650 $aCultivo Hidropônico
650 $aGlycine Max
650 $aHereditariedade
650 $aMelhoramento Genético Vegetal
650 $aNutriente
650 $aSoja
650 $aSolo Ácido
653 $aAluminium
653 $aCultivar
653 $aDiallel crossing
653 $aGenetic inheritance
653 $aTolerance
653 $aTolerancia
700 1 $aGALWEY, N. W.
773 $tTheoretical and Applied Genetics, New York$gv.92, p.267-272, 1996.
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Embrapa Cerrados (CPAC) |
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