INVESTIGADORES
POGGIO Lidia
artículos
Título:
New chromosome reports in the subtribes Diocleinae and Glycininae (Phaseoleae: Papilionoideae: Leguminoseae).
Autor/es:
SHIRLEY M. ESPERT, SILVANA M. SEDE, KAREN RUIZ, RENEE H. FORTUNATO AND LIDIA POGGIO
Revista:
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2008 vol. 158 p. 336 - 341
ISSN:
0024-4074
Resumen:
The base chromosome number of x = 11 is the most probable in all the subtribes included in tribe Phaseoleae,
although some aneuploid reduction is evident in Collaea and Galactia (Diocleinae) and chromosome duplications
are seen in Amphicarpaea, Cologania and Glycine (Glycininae). The aims of this study were to improve the
cytological knowledge of some species of Collaea and Galactia and to examine the anomalous counts reported for
Calopogonium (Glycininae) and verify its taxonomic position. In addition, a molecular phylogeny was constructed
using nuclear ribosomal DNA sequences (internal transcribed spacer region), and the chromosome number was
optimized on the topology. In this work, the chromosome counts for Galactia lindenii, Galactia decumbens and
Collaea cipoensis (all 2n = 20), and Calopogonium sericeum (2n = 22) are reported for the first time. The new
reports for Galactia and Collaea species are in agreement with the chromosome number proposed for subtribe
Diocleinae. The study rejects the concept of a cytologically anomalous Calopogonium and, based on the phylogenetic
analysis, corroborates the position of this genus within subtribe Glycininae. The ancestral basic chromosome
number of x = 11 proposed for Phaseoleae is in agreement with the evolutionary pathway of chromosome numbers
analysed in this work. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008,
158, 336341.