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Comparative and phylogenetic analyses of the chloroplast genomes of Filipendula species (Rosoideae, Rosaceae)
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Comparative and phylogenetic analyses of the chloroplast genomes of Filipendula species (Rosoideae, Rosaceae)
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Comparative and phylogenetic analyses of the chloroplast genomes of Filipendula species (Rosoideae, Rosaceae)
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Journal Article
Comparative and phylogenetic analyses of the chloroplast genomes of Filipendula species (Rosoideae, Rosaceae)
2023
Overview
Genus
Filipendula
(Rosoideae, Rosaceae) comprises about 15 species and mainly distributed in Northern Hemisphere. The phylogenetic relationships based on the nrITS marker are not consistent with the traditional taxonomic systems of the genus. Here, we first analysed the complete chloroplast (cp) genomes of seven
Filipendula
species (including two varieties of
F. palmate
). Our results indicated that the cp genomes of
Filipendula
species had few changes in size, ranging from 154,205 bp to 154,633 bp and the average of 36.63% GC content. A total of 126 annotated genes had the identical order and orientation, implying that the cp genome structure of
Filipendula
species was rather conserved. However, the cp genomes of
Filipendula
species exhibited structural differences, including gene loss, transposition and inversion when compared to those of other genera of Rosoideae. Moreover, SSRs with the different number were observed in the cp genome of each
Filipendula
species and sequence divergence mainly occurred in noncoding regions, in which four mutational hotspots were identified. In contrast, only two positive selection genes (
matK
and
rps8
) were found. Phylogenetic and molecular-dating analysis indicated that
Filipendula
species were divergent from other genera of Rosoideae at about 82.88 Ma. Additionally,
Filipendula
species from East Asia were split at about 9.64 Ma into two major clades. These results provide a basis for further studying the infrageneric classification of
Filipendula
.
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