IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Karyotypic studies in Argentinean and Chilean Lycium (Solanaceae).
Autor/es:
STIEFKENS L. & BERNARDELLO
Revista:
EDINBURGH JOURNAL OF BOTANY
Referencias:
Año: 2006 vol. 62 p. 53 - 67
ISSN:
0960-4286
Resumen:
Mitotic chromosomes numbers and karyotypes of
five Argentinean and Chilean taxa were determined in 22 populations. Lycium ciliatum and the varieties of L.
chilense analysed had diploid (2n = 24) as well as tetraploid (2n = 48)
populations. Lycium ameghinoi was always diploid with
2n = 24. The suggested basic number x = 12 for the
genus was confirmed. The chromosome number of L. chilense var. filifolium
is reported for the first time and data on karyotype composition are mostly
new. The karyotype of these taxa is highly symmetrical: the chromosomes are
metacentric or submetacentric with the formula: 11 m + 1 sm.
Microsatellites are present in chromosome pair #1 and are attached to the short
arms. As found in other Lycium taxa explored so far, karyotypic features
suggest that morphological differentiation in the group was not followed by
chromosomal divergence.