Karyological and taxonomic notes on Genista L. (Papilionoideae, Leguminosae) from the Iberian Peninsula

Citation
P. Cubas et al., Karyological and taxonomic notes on Genista L. (Papilionoideae, Leguminosae) from the Iberian Peninsula, BOTAN J LIN, 128(4), 1998, pp. 423-434
Citations number
25
Categorie Soggetti
Plant Sciences
Journal title
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN journal
00244074 → ACNP
Volume
128
Issue
4
Year of publication
1998
Pages
423 - 434
Database
ISI
SICI code
0024-4074(199812)128:4<423:KATNOG>2.0.ZU;2-Q
Abstract
Karyological information about Iberian Genista species is limited because o f their wide geographical distribution. It is a major factor in the underst anding of a genus whose genetic evolution is mostly related to aneuploidy a nd euploidy. The chromosome numbers of the following taxa have been counted : G. carpetana subsp. carpetana (n = 20), G. cinerascens (n = 12), G. micra ntha (n=18), G. mugronensis subsp. rigidissima (n=18), G., ramosissima (2n= 48) and G. tinctoria (n = 24). The previously-assumed uniformity of chromos ome number (n=24) for all the subspecies of G. cinerea is supported here by data from subspp. murcica and speciosa. In G. florida, a new chromosome nu mber, n=23, has been found for both subspecies (florida and polygaliphylla) . A discussion of the discrepancies between these data and previous ones is included. A new level of ploidy has been found in G. tournefortii subsp. t ournefortii (n = 32). The data stress the necessity of obtaining chromosoma l information from a number of plants of a tau;on before its characteristic number is clear, and indicate that more chromosomal data will help the und erstanding of the cytological diversity within taxa in Genista. (C) 1988 Th e Linnean Society or London.