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Predicted productivity gains in farmers' fields from breeding maize under stressed vs. non-stressed conditions

By: Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | Banziger, M.
Contributor(s): Edmeades, G.O [coaut.] | Ransom, J.K.|Palmer, A.F.E.|Zambezi, B.T.|Mduruma, Z.O.|Waddington, S.R.|Pixley, K.V.|Jewell, D.C [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Addis Ababa (Ethiopia) CIMMYT : 1997ISBN: 92-9146-025-7.Subject(s): Breeding methods | Genetic variation | Plant production | Stress | CIMMYT | Zea mays AGROVOC | Yields AGROVOC | Plant breeding AGROVOCDDC classification: 633.15 Summary: Conventional maize breeding programs usually use high-yielding selection environments, because genetic variance and heritability for grain yield are high under those conditions. However, most maize in the tropics is grown under stressed conditions and it is a challenge to the breeder to improve yields under these circumstances. This raises the question of whether using high-yielding selection environments is the most efficient way to improve grain yields under stressed conditions (the target environment). The paper addresses the theory which determines the efficiency of selection environments and calculates the breakoff point for nitrogen at which selection under stressed conditions becomes more efficient in targeting stressed environments than the use of high-yielding selection environments. Experimental evidence confirms these calculations.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.15 EAS No. 5 (Browse shelf) 1 Available 1F624172
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Conventional maize breeding programs usually use high-yielding selection environments, because genetic variance and heritability for grain yield are high under those conditions. However, most maize in the tropics is grown under stressed conditions and it is a challenge to the breeder to improve yields under these circumstances. This raises the question of whether using high-yielding selection environments is the most efficient way to improve grain yields under stressed conditions (the target environment). The paper addresses the theory which determines the efficiency of selection environments and calculates the breakoff point for nitrogen at which selection under stressed conditions becomes more efficient in targeting stressed environments than the use of high-yielding selection environments. Experimental evidence confirms these calculations.

Research and Partnership Program

English

9712|AGRIS 9702|anterior|R97-98PROCE|FINAL9798

Jose Juan Caballero

INT1888

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org