BUSCADOR RECOLECTA

Estudio Características del Solar situado en la Travesía de los Astilleros y Paseo de Caro de la zona portuaria de Valencia para Compañía Transmediterránea

Medalla Ricardo Palma de la Universidad Ricardo Palma a Justo Nieto, por su contribución al progreso social, a la afirmación humanística y al desarrollo de una cultura de paz.

Premio a Justo Nieto

Bajorrelieve Corts Valencianes. XXV Aniversari de l'Estatut d'Autonomia. III Centenari de la Batalla d'Almansa.

Premio a Justo Nieto de la E.T.S.I Geodesia, Cartografía y Topografía de la Universidad Politécnica de Valencia en el año 1998

Premio a Justo Nieto

Replica de las llaves de Cartagena de Indias. Homenaje del Pueblo de Colonia, Uruguay, al Rector de la Universidad Politécnica de Valencia

Agradecimiento a Justo Nieto de la Plataforma pro-animales de la Universitat Politècnica de València.

• Mutations affecting crossover frequency and distribution lead to the presence of univalents during meiosis, giving rise to aneuploid gametes and sterility. These mutations may have a different effect after chromosome doubling. The combination of altered ploidy and mutations could be potentially useful to gain new insights into the mechanisms and regulation of meiotic recombination, however, studies using autopolyploid meiotic mutants are scarce. • Here, we have analyzed the cytogenetic consequences in colchicine-induced autotetraploids (colchiploids) from different Arabidopsis mutants with an altered crossover frequency. • We have found that there are three types of mutants: i) mutants in which chiasma frequency is doubled after chromosome duplication (zip4, mus81), as in the control; ii) mutants in which polyploidy leads to higher-than expected increase in chiasma frequency (asy1, mer3, hei10, mlh3); and iii) mutants in which the rise in chiasma frequency produced by the presence of two extra chromosomal sets is less than doubled (msh5, fancm). In addition, the proportion of class I/class II crossovers varies after chromosome duplication in the control. • The results obtained reveal the potential of colchiploid meiotic mutants for better understanding of the function of key proteins during plant meiosis. This is especially relevant considering that most crops are polyploids.