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Searching for better white corn genetics for marginal uplands in the Philippines

By: Guzman, P.S | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico) | Proceedings of the Asian Regional Maize Workshop Bangkok (Thailand) 5-8 Aug 2002.
Contributor(s): Alejandro, F.R [coaut.] | Srinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2004Description: p. 156-164.ISBN: 970-648-116-8.Subject(s): Food crops | Maize | Seed production | Upland soils | Varieties | CIMMYT | Genotypes AGROVOC | Hybrids AGROVOC | Agricultural research AGROVOCSummary: There are ~1.2 million has of marginal uplands planted to native corn in the Philippines. To provide better corn genetics for farmers in these areas, a study was conducted to determine the stability for yield of white corn varieties in marginal uplands, to select genotypes with exceptional yield performance and to distribute selected varieties to resource poor farmers in the Philippines. Eighteen varieties were evaluated in a 6 x 3 alpha (0,1) lattice design with four replications at seven marginal uplands during the 1999 wet and 1999-"2000 dry seasons. The Additive Main effect and Multiplicative Interaction (AMMI) model was used to analyze the genotype x environment interaction, which was found to be significant in the combined ANOVA. AMMI analysis showed variability in both main effects and interaction. AG5355, a commercial hybrid, had the highest mean yield among the entries but its principal component (PC) score suggested that it is adapted to specific environments. USM Var10 exhibited the highest yield among the OPVs and revealed a PC score near zero suggesting broad adaptability. The native varieties showed below average performance and limited adaptability. The yield of the native corn varieties was 31% less than the improved varieties. We distributed seeds of USM Var10, which was derived from CIMMYT Pop 20, to "2000 marginal upland corn farmers. We designed a seed production and distribution system, which should make OPVs readily available to resource poor farmers in the Philippines.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection Look under series title (Browse shelf) 1 Available S630601
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There are ~1.2 million has of marginal uplands planted to native corn in the Philippines. To provide better corn genetics for farmers in these areas, a study was conducted to determine the stability for yield of white corn varieties in marginal uplands, to select genotypes with exceptional yield performance and to distribute selected varieties to resource poor farmers in the Philippines. Eighteen varieties were evaluated in a 6 x 3 alpha (0,1) lattice design with four replications at seven marginal uplands during the 1999 wet and 1999-"2000 dry seasons. The Additive Main effect and Multiplicative Interaction (AMMI) model was used to analyze the genotype x environment interaction, which was found to be significant in the combined ANOVA. AMMI analysis showed variability in both main effects and interaction. AG5355, a commercial hybrid, had the highest mean yield among the entries but its principal component (PC) score suggested that it is adapted to specific environments. USM Var10 exhibited the highest yield among the OPVs and revealed a PC score near zero suggesting broad adaptability. The native varieties showed below average performance and limited adaptability. The yield of the native corn varieties was 31% less than the improved varieties. We distributed seeds of USM Var10, which was derived from CIMMYT Pop 20, to "2000 marginal upland corn farmers. We designed a seed production and distribution system, which should make OPVs readily available to resource poor farmers in the Philippines.

English

0501|AGRIS 0501|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

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