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
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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:
BookAnalytics: 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
| Item type | Current location | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|---|---|
| Conference proceedings |
CIMMYT Knowledge Center: John Woolston Library
Lic. Jose Juan Caballero Flores
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CIMMYT Publications Collection | 633.15 EAS No. 5 (Browse shelf) | 1 | Available | 1F624172 |
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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