INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
. Interspecific and intergeneric hybridization in South-American Discaria and Ochetophila (Rhamnaceae-Colletieae).
Autor/es:
MEDAN, D., ARBETMAN, M., CHAIA, E.E. & PREMOLI, A.C.
Revista:
PLANT SYSTEMATICS AND EVOLUTION
Editorial:
SPRINGER WIEN
Referencias:
Lugar: Viena; Año: 2012 p. 1425 - 1435
ISSN:
0378-2697
Resumen:
Abstract In Gondwanic Discaria, phenotypically inter- mediate 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, morphologi- cal 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. Only pure parentals had diagnostic alleles by isozymes, whereas intermediates mainly showed those of D. chacaye. Our results confirm intrageneric hybridization between D. chacaye and D. articulata, and intergeneric hybridiza- tion between D. chacaye and related O. trinervis.