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hybrid ability and yield stability of tropical quality protein maize white lines

By: Córdova, H.S | 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): Avila, G [coaut.] | Ramírez A [coaut.] | Sierra, M [coaut.] | Trifunovic, S [coaut.] | Vergara, N [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2003Description: p. 110-111.Subject(s): Crossbreeding | Developing Countries | Endosperm AGROVOC | Germplasm | Maize | Seed production | CIMMYT | Genotypes AGROVOC | Plant breeding AGROVOCSummary: Forty-two million hectares of white endosperm maize is planted annually throughout the developing world. Ninety-five percent of this harvest is used for human consumption. Quality protein maize (QPM) could provide a good source of quality protein and, thereby, reduce the impact of malnutrition for the 70 million people living in Africa, Latin America, and Asia. CIMMYT's newly developed QPM is receiving increasing importance in the developing world. After five years of promotion of new QPM hybrids and synthetics, 18 countries have released cultivars covering more than 600,000 hectares (Cordova 2001). The availability of good QPM germplasm in the public and private sectors in the developing world will play an important role in the future of QPM hybrid development efforts. Since CIMMYT first released 56 QPM lines in 1992, no further releases have been completed. It is therefore necessary to accumulate information on combining ability for future releases, as well as yield stability in the single cross hybrids. Design II crosses have been used extensively in maize breeding research to: identify superior hybrids; investigate general combining abilities (GCA) of the parents; differentiate the best parent for hybrid formation; and determine material for new sources of heterotic groups (HG). The additive main effects and multiplicative interaction analysis (AMMI) have been reported to understand the complex genotype x environment (GE) interactions (Gauch and Zobel 1988; Ebdon and Gauch 2002).Collection: CIMMYT Staff Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Staff Publications Collection CIS-3878 (Browse shelf) 1 Available 632577
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Forty-two million hectares of white endosperm maize is planted annually throughout the developing world. Ninety-five percent of this harvest is used for human consumption. Quality protein maize (QPM) could provide a good source of quality protein and, thereby, reduce the impact of malnutrition for the 70 million people living in Africa, Latin America, and Asia. CIMMYT's newly developed QPM is receiving increasing importance in the developing world. After five years of promotion of new QPM hybrids and synthetics, 18 countries have released cultivars covering more than 600,000 hectares (Cordova 2001). The availability of good QPM germplasm in the public and private sectors in the developing world will play an important role in the future of QPM hybrid development efforts. Since CIMMYT first released 56 QPM lines in 1992, no further releases have been completed. It is therefore necessary to accumulate information on combining ability for future releases, as well as yield stability in the single cross hybrids. Design II crosses have been used extensively in maize breeding research to: identify superior hybrids; investigate general combining abilities (GCA) of the parents; differentiate the best parent for hybrid formation; and determine material for new sources of heterotic groups (HG). The additive main effects and multiplicative interaction analysis (AMMI) have been reported to understand the complex genotype x environment (GE) interactions (Gauch and Zobel 1988; Ebdon and Gauch 2002).

English

0309|AGRIS 0301|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Staff Publications Collection

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