Evaluation of four selectioncycles for resistance to corn stunting of the population 73.

Authors

  • A. Aguiluz Universidad Autónoma Agraria "Antonio Narro"
  • E. Navarro Instituto Mexicano de Maíz, Saltillo, Coah, México
  • F. Guerra CENTA, El Salvador
  • H. Córdova CIMMYT. México
  • A. Oyervides Instituto Mexicano de Maíz, Saltillo, Coah, México

DOI:

https://doi.org/10.15517/am.v6i0.24811

Abstract

Twelve corn (Zea mays L.) cultivars were evaluated under two environments in Central America and one in Mexico in order to determine the genetic progress achieved for resistance to stunting, after four selection cycles of the population 73. The trial included the synthetics from the cycles 0, 1,2,3 and 4, composites from the cycles 2, 3 and 4, three tolerant control s N8-6, Santa Rosa 8073 and the hybrid H-53, and a susceptible control (hybrid 8-833). The percent averages of stunted plants were relatively low (between 10 and 20 %) at the three localities. The cycle 4 synthetic yielded an average (4214 kg/ha) statistically alike to the hybrids 8-833 and H-53 (4288 and 4030 kg/ha, respectively). The cycle 4 synthetic showed the lowest stunting percentage (8.9%), the commercial tolerant variety NB-6 showed 16.2% and the susceptible hybrid (B-833) 22.8%. A lineal regression between yield averages and the selection cycles reveal an average gain per cycle of 149 kg/ha (4.3 % per cycle) and a reduction per cycle of 2% of stunted plants (11 % gain/cycle). It is concluded that the proceedings among S1 lines has been effective in improving the performance of population 73, increasing productivity of grain yield and the stunting resistance.

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References

AGUILUZ, A; URBINA, R; CELADO, R.; CORDOVA, H. 1991. Efecto del mejoramiento para resistencia al achaparramiento sobre el rendimiento de cultivares de maíz evaluados en siete ambientes de Centro América y El Caribe. In. XXXVII Reunión Anual del PCCMCA Panamá, Panamá.

CORDOVA, H.S.; AGUILUZ, A; URBINA, R 1992. Removing the menace of maize diseases through breeding: the case of corn stunt in CentralAmérica and the Caribbean. Agronomy Abstracts. p. 67.

DE LEÓN, C.; PINEDA, L.; RODRÍGUEZ, R 1984. Resistencia genética: una alternativa contra el achaparramiento del maíz. In: XXX Reunión Anual del PCCMCA Managua, Nicaragua.

URBINA, R 1986. Estabilidad del rendimiento de variedades de maíz resistentes al achaparramiento. In. XXXII Reunión Anual del PCCMCA San Salvador, El Salvador.

URBINA, R.; OBANDO, M.; AGUILUZ, A.; ALVARADO, A. 1993. Estabilidad y reacción al achaparramiento de cultivares de maíz a través de seis ambientes de Centro América. P. 67-72 en Síntesis de Resultados Experimentales 1992. PRM. Vol. 4, CIMMYT, Guatemala.

Published

2016-06-02

How to Cite

Aguiluz, A., Navarro, E., Guerra, F., Córdova, H., & Oyervides, A. (2016). Evaluation of four selectioncycles for resistance to corn stunting of the population 73. Agronomía Mesoamericana, 6, 88–92. https://doi.org/10.15517/am.v6i0.24811

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