Summary
A field screening procedure to evaluate a large portion of the sorghum [Sorghum bicolor (L.) Moench] world collection for tolerance to Al-toxic. low base status acid soils was developed that is now being employed in tropical South America. An Ultisol at Quilichao, Colombia, South America, with 63% Al-saturation, had Al-toxicity levels sufficient to kill sensitive sorghum genotypes, but not too high to prevent tolerant genotypes from producing reasonable yields of grain. Using soil classification maps of Africa to trace locations where particular genotypes were originally collected. genotypes were systematically selected for testing from areas with highly acid soils. The greatest genetic diversity in sorghum for Al tolerance might be expected to be found in the tropical areas with high percentages of acid soils. Higher percentages of sorghum lines in the tolerant and moderately tolerant category were selected from the acid soil areas in Kenya and Uganda than from the other African countries.
Grain yield trials of the more agronomically desirable Al-tolerant genotypes grown at three Al-saturation levels appeared to have acceptable qualities necessary for commercial low-input production strategies.
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© 1987 Martinus Nijhoff Publishers, Dordrecht/Boston/Lancaster
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Gourley, L.M. (1987). Identifying aluminum tolerance in sorghum genotypes grown on tropical acid soils. In: Gabelman, W.H., Loughman, B.C. (eds) Genetic Aspects of Plant Mineral Nutrition. Developments in Plant and Soil Sciences, vol 27. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3581-5_8
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DOI: https://doi.org/10.1007/978-94-009-3581-5_8
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