Genetic relationships in the Galactia–Camptosema–Collaea complex (Leguminosae) inferred from AFLP markers
2008
Sede, S. M. | Tosto, D. S. | Gottlieb, A. M. | Poggio, L. | Fortunato, R. H.
Some species belonging to the genera Galactia, Camptosema and Collaea from southern Brazil, Paraguay, Argentina, and Uruguay are grouped into a complex based on exomorphological affinities. The diagnostic morphological features sometimes overlap among species of different genera and dissimilar criteria have been adopted to delimit them, thus generating great taxonomic uncertainty. The aim of this work was to clarify the genetic relationships of the species within the complex as well as to analyze the infraspecific variability by means of analysing the AFLP band patterns. We examined 378 AFLP markers generated after amplification using six primer combinations. The monophyly of Collaea was supported, corroborating the present morphological classification. On the other hand, the results are not congruent with the current circumscription of Galactia and Camptosema, in agreement with previous phylogenetic hypotheses based on morphological characters and karyological studies, as both genera are polyphyletic.
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