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Estudio comparativo de Phalaris canariensis L. diploide y tetraploide. I.

Authors: Lorenzo Andreu, Antonio; García Sanz, María Pilar;

Estudio comparativo de Phalaris canariensis L. diploide y tetraploide. I.

Abstract

[ES] El cariotipo de Phalaris canariensis L., está constituído por seis parejas de cromosomas, de las cuales 4 son de constricción principal mediana-submediana y dos subterminal. El par mayor lleva un satélite en el brazo más corto. Se han obtenido formas tetraploides por tratamiento con colchicina. El tamaño del grano de polen, el de la semilla y el peso de ésta, son significativamente mayores en el tetraploide que en el diploide. Los números de flores y de semillas y la fertilidad son significativamente inferiores en el tetraploide que en el diploide. El ahijamiento es inferior en el tetraploide hasta la última fase del desarrollo en que es más rápido que el del diploide y terminan por igualarse. Otros caracteres determinados, como altura de la planta y tamaño de la espiga, no difieren significativamente en las muestras estudiadas. Es necesario incrementar por selección la fertilidad de los tetraploides, para obtener formas mejoradas con aumento de peso del grano.

[EN] The karotype of Phalaris canariensis L. is determined. This was found to have 4 pairs of chromosomes with medially-submedially attached centromere and 2 pairs of subterminally attached centromere. The longest submedian chromosome pair presents one satellite attached to the shorter chromosome arm. Tetraploid forms have been obtained after colchicine treatment. Pollen size, seed size and seed weight are significantly higher in tetraploid than in diploid plants while the number of florets and seeds and the seed set are lower in tetraploid than in diploid plants. Tillering is lower in tetraploid than in diploid plants, although there is a tendency to equal in the last growing period. Other characters, such as height of the plant and lengh of the spike do not differ significantly in both tetraploid and diploid. Selection should be fitted for better fertility of the tetraploids.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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