TAILIEUCHUNG - A phylogenetic analysis of genus Onobrychis and its relationships within the tribe Hedysareae (Fabaceae)
Results about a phylogenetic analysis of the genus Onobrychis Mill., tribe Hedysareae DC. are presented. The systematic knowledge of tribe Hedysareae is still incomplete, with difficult circumscription of genera and species. Analyses were undertaken using both nuclear (ITS) and chloroplast (matK) markers for a set of 78 accessions covering 41 Onobrychis species, besides previously sequenced Hedysareae accessions. | Turkish Journal of Botany Research Article Turk J Bot (2013) 37: 981-992 © TÜBİTAK doi: A phylogenetic analysis of genus Onobrychis and its relationships within the tribe Hedysareae (Fabaceae) 1, 1, 2 3 1 Nadeesha LEWKE BANDARA *, Alessio PAPINI *,**, Stefano MOSTI , Terence BROWN , Lydia Mary Josephine SMITH 1 The John Bingham Laboratory, National Institute of Agricultural Botany, Cambridge, UK 2 Department of Evolutionary Biology, University of Florence, Florence, Italy 3 Faculty of Life Sciences, Manchester Interdisciplinary Biocentre, University of Manchester, Manchester, UK Received: Accepted: Published Online: Printed: Abstract: Results about a phylogenetic analysis of the genus Onobrychis Mill., tribe Hedysareae DC. are presented. The systematic knowledge of tribe Hedysareae is still incomplete, with difficult circumscription of genera and species. Analyses were undertaken using both nuclear (ITS) and chloroplast (matK) markers for a set of 78 accessions covering 41 Onobrychis species, besides previously sequenced Hedysareae accessions. The phylogenetic methods used were maximum parsimony, maximum likelihood, and Bayesian analyses to produce phylogenetic trees and robustness indices. The genus Onobrychis was resolved as paraphyletic, with species of the genera Eversmannia Bunge and Hedysarum L. nested within it. The position of the section Membranacea of genus Hedysarum was as a sister group to Onobrychis and Eversmannia, separated from other accessions of Hedysarum. Variation in the 2 markers was sufficient to resolve infrageneric groups in Onobrychis and Hedysarum, but we were unable to completely resolve certain species in Onobrychis, particularly those within the sect. Onobrychis. The cause of this difficult species delimitation may be related to recent speciation, hybridization, and introgression events, particularly between cultivated species .
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