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A molecular phylogeny of Tropaeolaceae and its systematic implications
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Summary
Andersson, L. & Andersson, S.: A molecular phylogeny of
Tropaeolaceae
and its systematic implications. – Taxon 49: 721–736. 2000. – ISSN 0040‐0262.
Relationships among 35 species of
Tropaeolaceae
are estimated based on nucleotide sequence variation in plastid DNA (the
rbcL
gene and the
rps
16 intron) and nuclear ribosomal DNA (the ITS1–5.8S‐ITS2 tandem repeat).
Tropaeolum
becomes paraphyletic when
Magallana
and
Trophaeastrum
are segregated; therefore,
Magallana
and
Trophaeastrum
should be reduced to synonyms of
Tropaeolum.
The two new combinations
Tropaeolum porifolium
(Cav.) L.Andersson & S.Andersson and
T. trialatum
(Suess.) L. Andersson & S. Andersson are made. Further, although most of the sections of
Tropaeolum
that were recognised in Sparre and Andersson's monograph are monophyletic, only two entities can be distinguished that are both monophyletic and morphologically diagnosable. Therefore, the genus
Tropaeolum
should be subdivided into two sections,
T.
sect.
Tropaeolum
and
T.
sect.
Chilensia. Tropaeolum
sect.
Tropaeolum
should include the formerly recognised sections
Bicolora, Dipetala, Mucoronata, Schizotrophaeum, Serratociliata, Tropaeolum
, and
Umbellata. Tropaeolum
sect.
Chilensia
should include the formerly recognised genera
Magallana
and
Trophaeastrum
, and the formerly recognised
T.
sect.
Chymocarpus.
Title: A molecular phylogeny of
Tropaeolaceae
and its systematic implications
Description:
Summary
Andersson, L.
& Andersson, S.
: A molecular phylogeny of
Tropaeolaceae
and its systematic implications.
– Taxon 49: 721–736.
2000.
– ISSN 0040‐0262.
Relationships among 35 species of
Tropaeolaceae
are estimated based on nucleotide sequence variation in plastid DNA (the
rbcL
gene and the
rps
16 intron) and nuclear ribosomal DNA (the ITS1–5.
8S‐ITS2 tandem repeat).
Tropaeolum
becomes paraphyletic when
Magallana
and
Trophaeastrum
are segregated; therefore,
Magallana
and
Trophaeastrum
should be reduced to synonyms of
Tropaeolum.
The two new combinations
Tropaeolum porifolium
(Cav.
) L.
Andersson & S.
Andersson and
T.
trialatum
(Suess.
) L.
Andersson & S.
Andersson are made.
Further, although most of the sections of
Tropaeolum
that were recognised in Sparre and Andersson's monograph are monophyletic, only two entities can be distinguished that are both monophyletic and morphologically diagnosable.
Therefore, the genus
Tropaeolum
should be subdivided into two sections,
T.
sect.
Tropaeolum
and
T.
sect.
Chilensia.
Tropaeolum
sect.
Tropaeolum
should include the formerly recognised sections
Bicolora, Dipetala, Mucoronata, Schizotrophaeum, Serratociliata, Tropaeolum
, and
Umbellata.
Tropaeolum
sect.
Chilensia
should include the formerly recognised genera
Magallana
and
Trophaeastrum
, and the formerly recognised
T.
sect.
Chymocarpus.
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