TAILIEUCHUNG - cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology
Blechnaceae is an important leptosporangiate family (9–10 genera, about 250 species). It is monophyletic and distributed mainly in tropical America and Australasia. Among the species 80% belong to Blechnum, a genus with a very complex taxonomy and uncertain internal relationships. | Turkish Journal of Botany Turk J Bot (2013) 37: 769-777 © TÜBİTAK doi: Research Article cpDNA supports the identification of the major lineages of American Blechnum (Blechnaceae, Polypodiopsida) established by morphology 1, 1 2 3 1 Jose María GABRIEL Y GALÁN *, Carmen PRADA , Cristina ROLLERI , Abdelkader AINOUCHE , María VICENT 1 Plant Sciences Department, Universidad Complutense de Madrid, Avda. Jose Antonio Nováis 2, 28040 Madrid, Spain 2 Laboratorio de Estudios de Anatomía Vegetal Evolutiva y Sistemática (LEAVES), Facultad de Ciencias Naturales y Museo de La Plata, 64 entre 120 y diagonal 113, B1904 DZB, La Plata, Argentina 3 UMR CNRS 6553 Ecobio, Université de Rennes 1, Campus Scientifique de Beaulieu, Bât 14A, 35042 Rennes Cedex, France Received: Accepted: Published Online: Printed: Abstract: Blechnaceae is an important leptosporangiate family (9–10 genera, about 250 species). It is monophyletic and distributed mainly in tropical America and Australasia. Among the species 80% belong to Blechnum, a genus with a very complex taxonomy and uncertain internal relationships. In terms of American diversity, the results of morphological studies have arrived at 8 informal groups. Molecular works on this genus are scarce, and there is no information for the majority of American species. The main objective of this work was to evaluate whether the groups proposed to organise the diversity of American of Blechnum are consistent with a molecular analysis. We sequenced 2 chloroplastic regions from species representing all of the groups. In our molecular analysis most of the informal groups were maintained as well supported clades. Only 2 species, B. brasiliense and B. spicant, appear to be isolated from their alleged relatives. Combining our molecular results with previous morphological knowledge, we propose the recognition of 4 lineages: 1) B. serrulatum , 2)
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