Impact ofthe coro (Zea mays L) hybrids' development in Central America.
DOI:
https://doi.org/10.15517/am.v5i0.25064Abstract
The progress achieved by the corn hybrids' development in Central America is analyzed as the source for the regional data base of the PCCMCA (Programa Colaborativo Centroamericano para el Mejoramiento de Cultivos y Animales), taking as reference the 51 trials conducted between 1988 and 1990. This evaluation was conducted using a methodology which determines the confidence of response (RNi or probability of normalized response above zero) of superior cultivars with respect to a control. The confidence of the cultivars (HB83,HB85, H30, HA46, Dekalb B833, Pio-neer XLH53, HRI7, MAX307, H33 and TACSA203) was determined as a measure which integrates the magnitude of response as we1l as the variability of yields, with respect to the control H5. The evaluated genotypes were divided into three cIasses with respect to the H5. Genotypes of Superior confidence (H30 and HB85, 0.9>= RNi <= 1.0), Good confidence (HB83, HA46, Dekalb B833, XLH53, 0.8 >= RNi < 0.90) and Average confidence (HRI7, MAX307, H33, 0.6 >= RNi < 0.8). The genotypes HB85 and HB83 showed the highest potential as regional controls. In conclusion, further studies are needed to correlate the use of confidence to other methods in order to determine the genotype stability.
Downloads
References
CÓRDOVA, H. S. 1989. Evaluación de 36 cultivares de maíz en 20 ambientes de Centroamérica, Panamá y El Caribe, PCCMCA 1988. Presentado en la XXXV Reunión anual del PCCMCA, San Pedro Sula, Honduras. Abril 2-7, 1989.
CORDOVA, H. S. 1991. Respuestas diferenciales para rendimiento de híbridos de maíz evaluados en ambientes constrastantes de latinoamerica, PCCMCA 1990. En: Desarrollo y Mejoramiento de Germoplasma para Resistencia a Factores Adversos Bióticos y Abióticos 1990. Publicación del Programa Regional de Maíz para Centro américa y El Caribe. mimeo. pp15-33.
EBERHART, S. A.; RUSSELL, W. A. 1966. Stability parameters for comparing varieties. Crop Sci. 6:36-40.
ESKRIDGE K. M.; MUMM, R.F. 1992. Choosing cultivars based on the probability of outperforming a check. Theoretical and Applied Genetics. 84:494-500.
FlNLAY, K. W.; WILKINSON, G. N. 1963. The analysis of adaptation in a plant breeding programme. Aust. J. Agric. Res. 14:742-754.
QUEME, J. L.; FUENTES, M. R. 1992. Evaluación de híbridos de maíz (Zea mays L.) de grano blanco y amarillo en diferentes ambientes de Mexico, Centro America, EL Caribe y Venezuela. Programa Regional de Maiz PRM. Sintesis de resultados experimentales 1991. Vol 3:11-30.
GAUCH, H. G. 1988. Model selection and validation for yield trials with interaction. Biometrics 44(3):705-715.
LOPEZ-PEREIRA, M. A. 1991. Efectos de cambios de políticas agrícolas en la investigación en mejoramiento de maíz en Centro América y México. Trabajo presentado en la XXXIX Reunión Anual del PCCMCA, Marzo 28-AbriI3, 1993. Guatemala.
LOPEZ-PEREIRA, M. A.; ESPINOZA, A. 1993. Análisis económico de la producción y uso de semilla mejorada de maíz: El caso de Mexico. In: Memoria Anual en la XXXIX Reunión Anual del PCCMCA, Marzo 28-Abril3, 1993. Guatemala.
MORRIS, M. L.; LOPEZ-PEREIRA, M. A. 1991. Impacts of CIMMYT's maize breeding research: A preliminary overview. Borrador. Mexico D.F.: CIMMYT.
NULAND, D. S.; ESKRIDGE, K. M. 1992. Probability of outperforming a check. Annual report of the Bean Improvement Cooperative. Vol 35:17-18.
RAUN W. R.; BARRETO, H. J.; WESTERMAN, R. L. 1993. Use of stability analysis for long term soil fertility experiments. Agron. J. 85:159-167.
SHUKLA, G. K. 1972. Some statistical aspects of partition-ing genotype-environment components of variance. Heredity 29:237-245.
WALKER. 1980. Decision making by Farmers and by the National Agricultural Research Program on the Adoption and Development of Maize Varieties in El Salvador. Ph.D Dissertation, Food Research Institute, Stanford University.
Downloads
Published
How to Cite
Issue
Section
License
1. Proposed policy for open access journals
Authors who publish in this journal accept the following conditions:
a. Authors retain the copyright and assign to the journal the right to the first publication, with the work registered under the attribution, non-commercial and no-derivative license from Creative Commons, which allows third parties to use what has been published as long as they mention the authorship of the work and upon first publication in this journal, the work may not be used for commercial purposes and the publications may not be used to remix, transform or create another work.
b. Authors may enter into additional independent contractual arrangements for the non-exclusive distribution of the version of the article published in this journal (e.g., including it in an institutional repository or publishing it in a book) provided that they clearly indicate that the work was first published in this journal.
c. Authors are permitted and encouraged to publish their work on the Internet (e.g. on institutional or personal pages) before and during the review and publication process, as it may lead to productive exchanges and faster and wider dissemination of published work (see The Effect of Open Access).
