INVESTIGADORES
PREMOLI IL'GRANDE Andrea Cecilia
artículos
Título:
Interspecific and intergeneric hybridization in South American Rhamnaceae-Colletieae
Autor/es:
MEDAN D., M. ARBETMAN, E. CHAIA & A.C. PREMOLI
Revista:
PLANT SYSTEMATICS AND EVOLUTION
Editorial:
SPRINGER WIEN
Referencias:
Lugar: Viena; Año: 2012 vol. 298 p. 1425 - 1435
ISSN:
0378-2697
Resumen:
In Gondwanic Discaria, phenotypically intermediate
individuals exist between Discaria chacaye (G.
Don) Tortosa and Discaria articulata (Phil.) Miers, and
between D. chacaye and related Ochetophila trinervis
(Gillies ex Hook. & Arn.) Poepp. ex Miers. We studied
phenology, pollinators, parental crossability, morphological
features, and variation patterns on neutral markers.
Intermediates occur wherever parental taxa are sympatric
or in close proximity. Flowering was synchronous in
D. chacaye and D. articulata for 2 weeks. They also
shared three to six pollinator species (depending on site).
O. trinervis, which flowered later, occasionally overlapped
with D. articulata, with which it shared two pollinators.
Germinable seeds were obtained from hand pollinations
only from crosses with D. articulata as paternal parent and
D. chacaye as maternal parent. Sequencing of chloroplast
DNA revealed only two haplotypes. One occurred in
D. articulata, D. chacaye, and their intermediates, and the
other in O. trinervis and its intermediate with D. chacaye.