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Agronomía Trop. vol.55 no.3 Maracay Sept. 2005  Press Release | | | | |
| Artículos Originales | | | | | | · Análisis geoestadístico de la variabilidad temporal, a una escala anual y mensual, de parámetros climáticos en un campo experimental, estado Aragua, Venezuela
Cortéz, Adriana; Ovalles, Francisco A; Rodríguez, María F; Rey, Juan C; Núñez, María C
| | | | | | · Influencia de la semilla certificada de maíz en la productividad de los sistemas de producción de maíz en grano de los estados Portuguesa y Guarico
Vielma B, Magaly; Cerovich, Miriana; Miranda, Fausto; Marín R, Carlos
| | | | | | · Control químico de malezas en maíz en un sistema de siembra directa
García, Petra M; Mejía, José
| | | | | | · Uso de patrones isoenzimáticos para caracterizar la calidad genética de la semilla certificada de arroz en Venezuela
Rodríguez, Nohelia; Cerovich, Miriana; Ramis, Catalina; Miranda, Fausto; Trujillo, América; Figueroa, Rosana
| | | | | | · Estabilidad del rendimiento y potencial agronómico de híbridos de maíz de alta calidad de proteína (QPM) en Venezuela
San Vicente G, Félix M; Marín R, Carlos; Díaz, Dayzi
| | | | | | · Rendimiento del pimentón en respuesta al compost nutribora combinado con un fertilizante mineral y a diferentes distancias de siembra1
Rodríguez Reyes, Julio C; Marcano Cumana, Ángel E; Montaño, Nelson
| | | | | | · The main objetive of this study was to estimate additive, dominant and epistatic, genetic effects as well as to quantify heterosis and inbreeding depression for stunted plants, Fusarium diseased ears, husk cover, 443 prolificacy and grain yield in tropical maize. The study was conducted in 2003 through two seeding dates at the UAAAN Ursulo Galvan Experimental Station in the State of Veracruz, Mexico. Data were analyzed according to Generation Mean Genetic Design. Results showed that dominant effects for stunt resistance were more important than additive effects. Regarding digenic epistatic effects, additive by additive was the most important (2.18) and dominant by dominant the least (-1.89). For Fusarium diseased ears, the dominance effects and the epistatic additive by dominant effects were highest (2.64 y 4.10). With respect to husk cover all the genetic effects, except additive by additive, were small (1.88). For prolificacy the dominant effect (49.87) was four times greater than the additive effect (12.12). For grain yield all effects were positive, except dominant by dominant (-5.50), however the dominant effect was higher (15.57). In relation to heterosis, it was negative for stunted plants, Fusarium diseased plants and prolificacy, but not for grain yield. Inbreeding depression for stunted plant was -11.21%. It was also negative for Fusarium diseased ears and prolificacy. For grain yield a reduction of vigor from F1 to F2 of 57.14% was encountered.
Mendoza Elos, Mariano; López Benítez, Alfonso; Latournerie Moreno, Luis; Rangel Lucio, J. Antonio; Ramírez Pimentel, J. Gabriel; Rodríguez Herrera, Sergio A; Castañón Nájera, Guillermo
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