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Genetics of aluminum tolerance in maize evaluated in nutrient solution with and without control experiments

By: Parentoni, S.N | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | Arnel R. Hallauer International Symposium on Plant Breeding Mexico, D.F. (Mexico) 17-22 Aug 2003.
Contributor(s): Alves, V.M.C [coaut.] | Bahia Filho, A.F.C [coaut.] | Coelho, A.M [coaut.] | Gama, E.E.G [coaut.] | Godoy, C.L [coaut.] | Guimaraes, C.T [coaut.] | Guimaraes, P.E.O [coaut.] | Magalhaes, J [coaut.] | Meirelles, W.F [coaut.] | Oliveira, A.C [coaut.] | Pacheco, C.P [coaut.] | Pitta, G.E [coaut.] | Ribeiro, P.H.E [coaut.] | Santos, M.X [coaut.] | Schaffert, R.E [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2003Description: p. 60-61.Subject(s): Aluminium | Experimentation | Food production | Genetic correlation | Maize | Nutrient solutions | Tropical zones | Soil fertility AGROVOCDDC classification: 631.53 Summary: The soils of the tropical savannas are characterized by low fertility, pH, and phosophorus (P) availability, as well as high P absorption capacity and toxic levels of aluminum. (Foy 1988). These naturally degraded soils have been one of the principal constraints affecting development and food production in many countries throughout the tropics, representing 73% of the world's population. In Brazil, acid soils cover 205 million hectares; 112 million hectares are considered suitable for agriculture (Olmos and Camargo 1976). Aluminum (Al) toxicity has been recognized as a major constraint of plant productivity on acid soils, which accounts for more than 40% of the earth's arable land (Ma et al. 2001). Application of lime generally corrects the top layer of the soil but not subsoil acidity. Breeding programs in savannah areas have been able to develop modern cultivars with tolerance to aluminum toxicity and improved P acquisition efficiency. These cultivars have roots that can penetrate the acid subsoil with high levels of aluminum saturation, improving both water and nutrient use. For almost three decades, EMBRAPA (Brazil's Maize and Sorghum Research Center) has conducted a maize breeding program for adaptation to acid soils with emphasis on aluminum tolerance and phosphorus use efficiency (Parentoni 2001). Nutrient solution experiments are used to separate the effect of Al toxicity from all other deficiencies present in acid soils. Data from Al tolerance in a nutrient solution have been used for traditional breeding programs as well as to map aluminum tolerant genes in maize using molecular markers (Ninamango- Cardenas 2003). Nutrient solution experiments can be done using a complete nutrient solution with aluminum, or a control experiment (using a complete nutrient solution without aluminum). The objective of this study was to investigate the effects of the use of control experiments in the genetics of Al tolerance.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 631.53 BOO (Browse shelf) 1 Available S632399
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The soils of the tropical savannas are characterized by low fertility, pH, and phosophorus (P) availability, as well as high P absorption capacity and toxic levels of aluminum. (Foy 1988). These naturally degraded soils have been one of the principal constraints affecting development and food production in many countries throughout the tropics, representing 73% of the world's population. In Brazil, acid soils cover 205 million hectares; 112 million hectares are considered suitable for agriculture (Olmos and Camargo 1976). Aluminum (Al) toxicity has been recognized as a major constraint of plant productivity on acid soils, which accounts for more than 40% of the earth's arable land (Ma et al. 2001). Application of lime generally corrects the top layer of the soil but not subsoil acidity. Breeding programs in savannah areas have been able to develop modern cultivars with tolerance to aluminum toxicity and improved P acquisition efficiency. These cultivars have roots that can penetrate the acid subsoil with high levels of aluminum saturation, improving both water and nutrient use. For almost three decades, EMBRAPA (Brazil's Maize and Sorghum Research Center) has conducted a maize breeding program for adaptation to acid soils with emphasis on aluminum tolerance and phosphorus use efficiency (Parentoni 2001). Nutrient solution experiments are used to separate the effect of Al toxicity from all other deficiencies present in acid soils. Data from Al tolerance in a nutrient solution have been used for traditional breeding programs as well as to map aluminum tolerant genes in maize using molecular markers (Ninamango- Cardenas 2003). Nutrient solution experiments can be done using a complete nutrient solution with aluminum, or a control experiment (using a complete nutrient solution without aluminum). The objective of this study was to investigate the effects of the use of control experiments in the genetics of Al tolerance.

English

0309|AGRIS 0301|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

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