Tropical corn populations tolerant to acid soils.

Authors

  • H. Ceballos Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT).
  • S. Pandey Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT).
  • E. B. Knapp Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT).
  • J. V. Duque Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT).

DOI:

https://doi.org/10.15517/am.v5i0.25070

Abstract

Currently, five tropical maize populations from CIMMYT are being bred for tolerance to acid soils through a full-sib recurrent selection scheme. Three cycles of selection from each population were evaluated in a split-plot design, with a varied number of replications under five environments (with normal soils, and the remaining four with varying degrees of soil stress). The observed genetic gains from these populations were highly significant: 4.72 % per cycle at all environments, 4.90% per cycle in acid soil environments (LSA), and 4.21 % per cycle for the normal soil location (LNA). The results suggest adequate genetic variability and high heritability for tolerance to soil acidity. In comparative trials, these populations yielded an average of 2.29 and 6.25 t/ha in the three LSA and two LNA environments, respectively. Under the same environments, the controls used (Tuxpeño, Pool 26 and Suwan-1) yielded an average of 1.28 and 5.56 t/ha.

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References

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Published

2016-06-15

How to Cite

Ceballos, H., Pandey, S., Knapp, E. B., & Duque, J. V. (2016). Tropical corn populations tolerant to acid soils. Agronomía Mesoamericana, 5, 96–103. https://doi.org/10.15517/am.v5i0.25070

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