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Breeding drought tolerant maize in the Mid-Atlantic Region of the USA

By: Hawk, J.A | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Edmeades, G.O.|Banziger, M.|Mickelson, H.R.|Pena-Valdivia, C.B [eds.] | Weldekidan, T [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1997ISBN: 968-6923-93-4.Subject(s): Agronomic characters | Drought resistance | Drought stress AGROVOC | USA | CIMMYT | Zea mays AGROVOC | Genotypes AGROVOC | Plant breeding AGROVOCDDC classification: 633.153 Summary: Drought is a major abiotic factor limiting maize yields in the mid -Atlantic region of the USA. A major objective of the Delaware maize breeding program is to identify drought tolerant germplasm and utilize it to develop adapted drought tolerant genotypes for the seed industry. Potential sources of germplasm (public inbreds and populations, commercial hybrid s, a n d GEM accessions) and breeding populations derived from these sources are evaluated per se in screening nurseries at both moderate and high plant densities. Genotypes with reduced anthesis-silking interval (ASI), good ear development and agronomic performance, and pest resistance are used as source materials to develop breeding populations. Testcross hybrids of S2 selections are evaluated at two irrigated and one dryland location to identify genotypes with adequate yield potential and agronomic performance. The second year of yield testing involves evaluation at two to three irrigated and two to three dryland locations, including at least one location on the sandy soils of the Delmarva Peninsula. Genotypes with high yield and good agronomic performance are advanced for more extensive testing in subsequent years at multiple locations. These procedures appear to have potential for developing adapted drought-tolerant germplasm with levels of pest resistance and agronomic performance adequate for the mid-Atlantic region.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.153 EDM (Browse shelf) 1 Available 3J624179
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Drought is a major abiotic factor limiting maize yields in the mid -Atlantic region of the USA. A major objective of the Delaware maize breeding program is to identify drought tolerant germplasm and utilize it to develop adapted drought tolerant genotypes for the seed industry. Potential sources of germplasm (public inbreds and populations, commercial hybrid s, a n d GEM accessions) and breeding populations derived from these sources are evaluated per se in screening nurseries at both moderate and high plant densities. Genotypes with reduced anthesis-silking interval (ASI), good ear development and agronomic performance, and pest resistance are used as source materials to develop breeding populations. Testcross hybrids of S2 selections are evaluated at two irrigated and one dryland location to identify genotypes with adequate yield potential and agronomic performance. The second year of yield testing involves evaluation at two to three irrigated and two to three dryland locations, including at least one location on the sandy soils of the Delmarva Peninsula. Genotypes with high yield and good agronomic performance are advanced for more extensive testing in subsequent years at multiple locations. These procedures appear to have potential for developing adapted drought-tolerant germplasm with levels of pest resistance and agronomic performance adequate for the mid-Atlantic region.

English

9802|AGRIS 9702

Jose Juan Caballero

CIMMYT Publications Collection

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