IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Karyotype studies in Grabowskia and Phrodus (Solanaceae).
Autor/es:
BERNARDELLO G., STIEFKENS L , LAS PEÑAS M. L.
Revista:
PLANT SYSTEMATICS AND EVOLUTION
Referencias:
Año: 2009 vol. 275 p. 265 - 269
ISSN:
0378-2697
Resumen:
Mitotic chromosome numbers and karyotypes of Grabowskia (G. boerhaviaefolia, G. duplicata, G. obtusa) and Phrodus microphyllus were determined. Both genera were diploid with 2n = 24. The chromosome number of G. obtusa is reported here for the first time. Karyotypes of Grabowskia species were highly symmetrical with 11 m + 1 sm pairs. Phrodus microphyllus showed a different formula: 8 m + 3 sm + 1 stpairs. Karyotypic features suggest that morphological differentiation in Grabowskia was not followed by chromosomal divergence, as previously found in Lycium as well. Although symmetrical karyotypes have been correlated with an ancestral condition of the taxa bearing them, in the tribe Lycieae the basal genus Phrodus showed the opposite trend.