Phylogenetic relationships in the orchid genus Serapias L. based on noncoding regions of the chloroplast genome

Molecular Phylogenetics and Evolution
F BellusciA Musacchio

Abstract

A molecular phylogenetic analysis was performed on 14 species of the Mediterranean unrewarding orchid genus Serapias using sequences of four noncoding regions of chloroplast DNA. This study has led to a new interpretation of the evolutionary relationships in this genus. The well-defined phylogenetic tree supports a division of taxa into two main clades, each including two minor groups. The molecular relationships found in this study differ from those defined by traditional systematic morphological assessments. By comparing the variation in sequence to variations in floral traits, we propose that the split in the two main lineages reflects an early differentiation of flower size, perhaps due to the shift from allo- to self-pollination. Conversely, the relationships within each minor group do not reflect floral size variation; therefore, we presume that this diversification resulted from genetic drift, local selection forces, and multiple, independent transitions towards self-pollination and polyploidy.

References

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Jan 4, 1994·Proceedings of the National Academy of Sciences of the United States of America·V Grant
Jun 1, 2003·American Journal of Botany·Elizabeth Elle, Robert Carney

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Citations

Sep 23, 2014·Functional & Integrative Genomics·Alok K GuptaFlorian P Schiestl
Oct 12, 2012·Proceedings. Biological Sciences·Nicolas J VereeckenPatrick Mardulyn
Apr 20, 2013·Annals of Botany·Nicolas J VereeckenStella Watts
Sep 26, 2017·Ecology and Evolution·Giuseppe PellegrinoAnna Maria Palermo

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