e-journal

Chloroplast phylogenomics resolves key relationships in ferns

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Studies on chloroplast genomes of ferns and lycophytes are relatively few in comparison with those on
seed plants. Although a basic phylogenetic framework of extant ferns is available, relationships among a few key
nodes remain unresolved or poorly supported. The primary objective of this study is to explore the phylogenetic
utility of large chloroplast gene data in resolving difficult deep nodes in ferns. We sequenced the chloroplast
genomes from Cyrtomium devexiscapulae (Koidz.) Ching (eupolypod I) and Woodwardia unigemmata (Makino)
Nakai (eupolypod II), and constructed the phylogeny of ferns based on both 48 genes and 64 genes. The trees based
on 48 genes and 64 genes are identical in topology, differing only in support values for four nodes, three of
which showed higher support values for the 48-gene dataset. Equisetum L. was resolved as the sister to the
Psilotales–Ophioglossales clade, and Equisetales–Psilotales–Ophioglossales clade was sister to the clade of the
leptosporangiate and marattioid ferns. The sister relationship between the tree fern clade and polypods was
supported by 82% and 100% bootstrap values in the 64-gene and 48-gene trees, respectively. Within polypod ferns,
Pteridaceae was sister to the clade of Dennstaedtiaceae and eupolypods with a high support value, and the
relationship of Dennstaedtiaceae–eupolypods was strongly supported. With recent parallel advances in the
phylogenetics of ferns using nuclear data, chloroplast phylogenomics shows great potential in providing a
framework for testing the impact of reticulate evolution in the early evolution of ferns.

Key words: chloroplast genome, chloroplast phylogenomics, ferns, phylogenetics, polypods.

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Ketersediaan

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Informasi Detail

Judul Seri

J. Syst. Evol

No. Panggil

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Penerbit

: Institute of Botany., 2015

Deskripsi Fisik

J. Syst. Evol. 53 (5): 448–457, 2015

Bahasa

English

ISBN/ISSN

doi: 10.1111/jse.121

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

BIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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