Variability for phase transition among races of maize and related wild forms
Variability for the timing of vegetative phase change has been related to disease and pest resistance and to agronomic performance and could be a useful indirect selection criterion. Our objective was to determine the variability for phase transition among populations from historical races of maize...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/42751 |
| Acceso en línea: | http://hdl.handle.net/10261/42751 |
| Access Level: | acceso abierto |
| Palabra clave: | Phase transition Maize Zea mays ssp. |
| Sumario: | Variability for the timing of vegetative phase change has been related to disease and pest resistance and to agronomic performance and could be a useful indirect selection criterion. Our objective was to determine the variability for phase transition among populations from historical races of maize (Zea mays L.) and wild species and subspecies of Zea. Principal component and cluster analysis were made on morphological and anatomical traits of maize races and populations and the wild species and subspecies of Zea. In maize, there was great variability among the races Northern Flint and Southern Dent, which were more juvenile than Corn Belt Dent. Maize from humid Spain clustered with US maize, while maize from dry Spain was different. The ordination of the maize accessions agreed with the historical records and the isozyme data. Compared to the wild accessions, maize was more adult¬like. Z. mays ssp. parviglumis and mexicana are those most different to maize. The differences among Z. luxurians, Z. perennis, and Z. diploperennis are not larger than the differences among the maize accessions. If phase transition has to be used as an indirect selection criterion, there is enough variability for phase transition among the maize races, further variability could be found, if necessary, among the wild species and subspecies of Zea. |
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