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handle: 10261/179995
[ES] Se exponen los resultados obtenidos en la F1. F2 y retrocruzamientos utilizando material de maíz que presenta distintas alteraciones de filotaxia. Se estudia la segregación y expresividad de algunos caracteres, entre los que se incluye la presencia de gérmenes múltiples, con objeto de intentar definir la naturaleza hereditaria del carácter o caracteres en cuestión. La complejidad de los resultados obtenidos da idea de la dificultad del problema. No obstante, parece ser que en autofecundación de material consanguíneo, las plantas normales dan siempre descendencia normal, mientras que las anormales pueden dar cualquier tipo de anormalidad, si bien las de gérmenes múltiples sólo lo hacen cuando son a la vez anormales. En los cruzamientos realizados en ambos sentidos entre plantas normales y anormales, la descendencia aparece siempre normal, independientemente de la naturaleza de la anormalidad. En la F2 se pone de manifiesto la existencia de segregación de las anormalidades estudiadas.
[EN] Observations were made on F1, F2 and backcrossed maize plants of modified phyllotaxis including plurality of embryos. Selfing normal inbred material, the offspring was normal, while the selfed abnormal plants gave origin to every type of abnormality. However, the material with plurality of embryos gave abnormal plants only when the corresponding selfed plant presented another abnormality at the same time. Crossing abnormal with normal plants, in both directions, the resulting offspring was normal. Segrngation of abnormalities was clearly manifested in the F2 plants.
8 Pags.- 3 Figs.- 3 Cuadrs.
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