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Updated: Jun 21, 2026
07:09
A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines
Published on: January 4, 2014
De la teosinta al maíz: la catastrófica transmutación sexual
Science (New York, N.Y.)
|November 25, 1983
Resumen
El maíz (Zea mays) puede haber evolucionado de la borla masculina de teosinte, no de su oreja femenina. Esta teoría explica las similitudes genéticas y el maíz.
Área de la Ciencia:
- Botánica La botánica es la botánica.
- Biología evolutiva Biología evolutiva.
- Genética La genética.
Sus antecedentes:
- El origen evolutivo del maíz (Zea mays ssp. mays) de teosinte es objeto de debate.
- Las teorías existentes luchan por explicar las mínimas diferencias genéticas y bioquímicas entre el maíz y el teosinte.
Objetivo del estudio:
- Proponer y apoyar una hipótesis alternativa para la evolución del cultivo del maíz.
- Para explicar las similitudes morfológicas y genéticas entre el maíz y el teosinte.
Principales métodos:
- Comparación morfológica de las inflorescencias de maíz y teosinte.
- Análisis de datos genéticos y bioquímicos.
- Hipótesis de cambios epigenéticos y de desarrollo.
Principales resultados:
- El teosinte tassel macho es morfológicamente consistente con la estructura de la espiga de maíz.
- Esta hipótesis explica mejor la divergencia genética limitada entre el maíz y el teosinte.
- Las inflorescencias unisexuales del maíz sugieren una rápida transmutación sexual, posiblemente desencadenada por el medio ambiente.
Conclusiones:
- La oreja de maíz probablemente evolucionó de la borla masculina teosinte, no de la oreja femenina.
- Esta vía evolutiva involucró cambios epigenéticos, dominio apical y asignación alterada de nutrientes.
- La selección humana probablemente asimiló esta anormalidad, lo que llevó a la moderna planta de maíz.
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