SELECTING TOLERANT MAIZE VARIETIES TO WATER STRESS
In order to select varieties of white and yellow maize grain with water stress tolerance, 18 trials were planted in farmers’ fields and the Experimental Station of El Ejido, located in Los Santos province, Panama in 2010, 2011 and 2012. The synthetic evaluated varieties were took from the project Generation and validation of varieties of drought tolerant maize as a means to stabilize productivity and reduce mycotoxin damage due to climate change. To assess tolerance to water deficit each year, a set of tests was sown in August and one in October. In every year, the rainfall in August sowing was higher than in October planting. The most critical period was 50 days after sowing (DAS) with differences of 94, 146 and 176 mm for each year, respectively. The differences between the two crops of different trials ranged from 0,85 to 2,75 t.ha-1 for 2010 and 2011 and 4,00 to 3,27 t.ha-1 in 2012. The variance analyses of all trials were conducted and they showed the same statistical differences between cultivars. Repeatability and high percentages of low coefficients of variation were obtained. In the different groups, three synthetic varieties of promising cultivars were identified and selected for their good performance in the overall average in all locations and good tolerance and low yield reduction due the water deficit they were subjected to.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Innovación Agropecuaria de Panamá
2015
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/121 |
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