GENETIC COEFFICIENTS OF TWO CULTIVARS OF CORNS, AZUERO - PANAMA
Keywords:
Climate change, simulation, thermal time, vegetative stage, reproductive stage.Abstract
This research was conducted at IDIAP’s Research Station at El Ejido, Los Santos Province. IDIAP-MV-1102 variety and P-4226 hybrid were tested. The experimental unit consisted of 15 10 meters’ rows separated 0,75 m with 0,20 m between plants. Two planting dates were established, in August and October. Vegetative and reproductive stages of 15 plants for each cultivar were evaluated by sowing date. Development of vegetative and reproductive stages of 15 plants for each cultivar were evaluated by sowing date. Exact thermal time for each phenological stage was defined. Juvenile stage was determined through destructive sampling from the third leaf. By the end of productive cycle, chronological age of crop was 118 days after sowing (das), equivalent to 2011,80° Cd, with vegetative period ending with 20 expanded leaves for both the variety and hybrid, and maximum heat unit’s accumulation of 889,43° Cd. During grain evolution, hybrid and variety obtained weight gains of 0,12 and 0,11 g/day, respectively. During vegetative and reproductive periods, IDIAP-MV-1102 used 890 ± 9,87° Cd and 1926±17,39° Cd. End of juvenile and physiological maturity periods occurred at 25 and 112 das. Juvenile period of P-4226 ended at 24 das and physiological maturity at 104 das, with a thermal time during vegetative and reproductive periods of 889 ± 9,17° Cd and 1755 ± 2574° Cd, respectively.
Downloads
References
Bolaños, J; Edmeades, GO. 1993. Eight cycles of selection for drought tolerance in lowland tropical maize. II. Responses in reproductive behavior. Field Crops Research. México. 31:253-272.
Bolaños, J; Edmeades, G. 1992. La fenología del maíz. In Síntesis de Resultados Experimentales del PRM, 1992. J. Bolaños, G. Saín, R. Urbina y H. Barreto (Editores). México. 4:251-261.
Borrás, L; Gambín, B. 2010. Trait dissection of maize kernel weight: towards integrating hierarchical scales using a plant growth approach. Field Crops Res. 118:1-12.
Campbell, G; Stockle, C; Martin, S. 1994. CropSyst, a cropping systems simulation model: hwater/nitrogen budgets and crop yield. Agricultural systems 46(3):335-359.
Corrales, L. 2010. Informe Final Efectos del Cambio Climático para Centroamérica. Cuarto Informe. Estado de la región. 18 p.
Crafts-Brandner, S; Salvucci, M. 2002. Sensitivity of photosynthesis in C4 plants, maize, to heat stress. Plant Physiology. Arizona. 129:1773-1780.
Edmeades, GO; Ellis, RH; Lafitte, HR. 1992. Photermal responses of tropically-adapted maize. Trabajo presentado en 84ava reunión anual de American Society of Agronomy. ASA Abstracts. 124 p.
Egli, B. 1998. Seed biology and the yield of grain crops. CAB International, New York. 178p.
Esteves, M; Román-Paoli, E; Beaver, JS; Muñoz, M; Armstrong, A. 2012. Deterninación de coeficientes genéticos en tres cultivares y un híbrido de maíz. J. Agric. Univ P.R. 96(1-2):57-75.
Fischer, K; Palmer, A. 1984. Tropical maize. In Goldsworthy, PR and Fischer, NM. (eds). The physiology of tropical field crops. John Wiley & Sons. New York. p. 213-248.
Gordón, R. 2012. Manejo Integral del Cultivo de Maíz. Instituto de Investigación Agropecuaria de Panamá. Panamá. 18 p.
Holdridge, LR. 1967. Sistema de clasificación de zonas de vida de Holdridge. Ecología basada en zonas de vidas. San José, CR. 206 p.
Jones, CA; Kiniry, JR. 1986. CERES-Maize: A simulation model of maize growth and development. Texas A & M University Press, College Station, 144 p.
Monteith, JL. 1996. ‘‘The Quest for Balance in Crop Modeling’’. Agronomy Journal 88:(5):695-697.
Mora, J; Ramírez, D; Ordaz, JL; Acosta, A; Serna, B. 2010. Efectos Del Cambio Climático Sobre La Agricultura. Comisión Económica para América Latina y el Caribe (CEPAL) Sede Subregional en México. Panamá. 71 p.
Nelson, G; Rosegrant, M; Koo, J; Robertson, R; Sulser, T; Zhu, T; Ringler, C; Msangi, S; Palazzo, A; Batka, M; Magalhaes, M; Valmonte-Santos, R; Ewing, M; Lee, D. 2009. Cambio Climático El impacto en la agricultura y los costos de adaptación. Instituto Internacional de Investigación sobre Políticas Alimentarias IFPRI Washington, D.C. 19p.
Rodríguez, L; Hernández, F; Cruz, J; Marto, J; Ortiz, R. 2016. Crecimiento e índice de cosecha de variedades locales de maíz (Zea mays l.) en comunidades de la Región Frailesca de Chiapas, México. Cultivos Tropicales 37(3):137-145.
Turrent, A; Barrios, A; Otero, A; Ariza, R; Michel, A. 2006. Efectos de la interacción genotipos x prácticas de manejo sobre el índice de cosecha de híbridos de maíz bajo riego. Asociación Interciencia: Revista de ciencia y tecnología de América 31(7):530-544.
Villarreal, J; Name, B. 1996. Técnicas analíticas del laboratorio de suelos. Instituto de Investigación Agropecuaria de Panamá. Panamá. 110 p.
Yzarra, W; Trebejo, I; Noriega, V. 2009. Evaluación de unidades térmicas para el crecimiento y desarrollo del cultivo de maíz amarillo duro (Zea mays, L.) en la costa central del Perú. Revista Peruana Geo-Atmosférica RPGA no. 1:1-10.
Downloads
Published
Issue
Section
License
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-CompartirIgual 4.0 Internacional.
