Data/hora: 05/06/2024 00:03:25

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 24/05/1996
Data da última atualização: | 24/05/1996
Autoria: | SPEHAR, C. R.; GALWEY, N. W.
Título: | Diallel analysis for aluminium tolerance in tropical soybeans [Glycine max (L.) Merrill].
Ano de publicação: | 1996
Fonte/Imprenta: | Theoretical and Applied Genetics, New York, v.92, p.267-272, 1996.
Idioma: | Inglês
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.
Palavras-Chave: | Aluminium; Cultivar; Diallel crossing; Genetic inheritance; Tolerance; Tolerancia.
Thesagro: | Alumínio; Cerrado; Cruzamento Dialélico; Cultivo Hidropônico; Glycine Max; Hereditariedade; Melhoramento Genético Vegetal; Nutriente; Soja; Solo Ácido.
Thesaurus Nal: | acid soils; hydroponics; nutrients; plant breeding; soybeans; varieties.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (8670-1) - UPC - SP - -- - CRI3995 -  - CRI3995 - DIS