| Autor: |
C. O. Gardner, R. Magnavaca, R. B. Clark |
| Rok vydání: |
1987 |
| Předmět: |
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| Zdroj: |
Genetic Aspects of Plant Mineral Nutrition ISBN: 9789401081023 |
| DOI: |
10.1007/978-94-009-3581-5_17 |
| Popis: |
The original Brazilian maize (Zea mays L.) base population ‘Composto Amplo’ and a fourth cycle of selection from ‘Composto Amplo’ were compared with the Hays Golden vareity. Nebraska B Synthetic. Corn Belt x Brazilian. and Corn Belt x Caribbean populations for Al tolerance when grown in nurtient solutions (241 μmol AlL 1). Root lengths of the original ‘Composto Amplo’ population were slightly longer than those of the selected ‘Composto Amplo’ population when grown with Al, and these were considerably longer than the other populations. The selection of ‘Composto Amplo’ maize population for Al tolerance when grown in an acid Brazilian Oxisol soil, based on grain yield. decreased the frequency of the more Al tolerant plants in favor of intermediate Al tolerant plants. When both of the ‘Composto Amplo’ populations were compared with the temperate Corn Belt (Hays Golden and Nebraska B Synthetic) and Corn Belt x — tropical (Brazilian and Caribbean) populations, the ‘Composto Amplo’ populations had a higher frequency of genes for Al tolerance than the other populations. The population derived from the cross of Corn Belt x Brazilian materials consistently ranked high in Al tolerance relative to Hays Golden and Nebraska B Synthetic. The introgression of Brazilian germplasm into other populations increased the tolerance of these populations to Al toxicity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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