Structural rearrangements of the chloroplast genome provide an important phylogenetic link in ferns
1992
Stein, D.B. | Conant, D.S. | Ahearn, M.E. | Jordan, E.T. | Kirch, S.A. | Hasebe, M. | Iwatsuki, K. | Tan, M.K. | Thomson, J.A.
The chloroplast genome of most land plants is highly conserved. In contrast, physical and gene mapping studies have revealed a highly rearranged chloroplast genome in species representing four families of ferns. In all four, there has been a rare duplication of the psbA gene and the order of the psbA, 16S, and 23S rRNA genes has been inverted. Our analysis shows that the described rearrangement results from a minimum of two inversions within the inverted repeat. This chloroplast DNA structure provides unambiguous evidence that phylogenetically links families of ferns once thought to belong to different major evolutionary lineages.
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