Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences
Phylogenetic relationships were examined within the southern beech family Nothofagaceae using 22 species representing the four currently recognized subgenera and related outgroups. Nuclear ribosomal DNA sequences encoding the 5.8s rRNA and two flanking internal transcribed spacers (ITS) provided 95...
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crwiley:10.2307/2446156 2023-12-03T10:12:44+01:00 Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences Manos, Paul S. A.W. Mellon Foundation 1997 http://dx.doi.org/10.2307/2446156 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446156 http://onlinelibrary.wiley.com/wol1/doi/10.2307/2446156/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 84, issue 8, page 1137-1155 ISSN 0002-9122 1537-2197 Plant Science Genetics Ecology, Evolution, Behavior and Systematics journal-article 1997 crwiley https://doi.org/10.2307/2446156 2023-11-09T14:03:46Z Phylogenetic relationships were examined within the southern beech family Nothofagaceae using 22 species representing the four currently recognized subgenera and related outgroups. Nuclear ribosomal DNA sequences encoding the 5.8s rRNA and two flanking internal transcribed spacers (ITS) provided 95 phylogenetically informative nucleotide sites from a single alignment of ~ 588 bases per species. Parsimony analysis of this variation produced two equally parsimonious trees supporting four monophyletic groups, which correspond to groups designated by pollen type. These topologies were compared to trees from reanalyses of previously reported rbcL sequences and a modified morphological data set. Results from parsimony analysis of the three data sets were highly congruent, with topological differences restricted to the placement of a few terminal taxa. Combined analysis of molecular and morphological data produced six equally parsimonious trees. The consensus of these trees suggests two basal clades within Nothofagus . Within the larger of the two clades, tropical Nothofagus (subgenus Brassospora ) of New Guinea and New Caledonia are strongly supported as sister to cool‐temperate species of South America (subgenus Nothofagus ). Most of the morphological apomorphies of the cupule, fruit, and pollen of Nothofagus are distributed within this larger clade. An area cladogram based on the consensus of combined data supports three trans‐Antarctic relationships, two within pollen groups and one between pollen groups. Fossil data support continuous ancestral distributions for all four pollen groups prior to continental drift; therefore, vicariance adequately explains two of these disjunctions. Extinction of trans‐Antarctic sister taxa within formerly widespread pollen groups explains the third disjunction; this results in a biogeographic pattern indicative of phylogenetic relationship not vicariance. For the biogeographically informative vicariant clades, area relationships based on total evidence support the recently advanced ... Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library (via Crossref) Antarctic American Journal of Botany 84 8 1137 1155 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics Manos, Paul S. Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
topic_facet |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics |
description |
Phylogenetic relationships were examined within the southern beech family Nothofagaceae using 22 species representing the four currently recognized subgenera and related outgroups. Nuclear ribosomal DNA sequences encoding the 5.8s rRNA and two flanking internal transcribed spacers (ITS) provided 95 phylogenetically informative nucleotide sites from a single alignment of ~ 588 bases per species. Parsimony analysis of this variation produced two equally parsimonious trees supporting four monophyletic groups, which correspond to groups designated by pollen type. These topologies were compared to trees from reanalyses of previously reported rbcL sequences and a modified morphological data set. Results from parsimony analysis of the three data sets were highly congruent, with topological differences restricted to the placement of a few terminal taxa. Combined analysis of molecular and morphological data produced six equally parsimonious trees. The consensus of these trees suggests two basal clades within Nothofagus . Within the larger of the two clades, tropical Nothofagus (subgenus Brassospora ) of New Guinea and New Caledonia are strongly supported as sister to cool‐temperate species of South America (subgenus Nothofagus ). Most of the morphological apomorphies of the cupule, fruit, and pollen of Nothofagus are distributed within this larger clade. An area cladogram based on the consensus of combined data supports three trans‐Antarctic relationships, two within pollen groups and one between pollen groups. Fossil data support continuous ancestral distributions for all four pollen groups prior to continental drift; therefore, vicariance adequately explains two of these disjunctions. Extinction of trans‐Antarctic sister taxa within formerly widespread pollen groups explains the third disjunction; this results in a biogeographic pattern indicative of phylogenetic relationship not vicariance. For the biogeographically informative vicariant clades, area relationships based on total evidence support the recently advanced ... |
author2 |
A.W. Mellon Foundation |
format |
Article in Journal/Newspaper |
author |
Manos, Paul S. |
author_facet |
Manos, Paul S. |
author_sort |
Manos, Paul S. |
title |
Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
title_short |
Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
title_full |
Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
title_fullStr |
Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
title_full_unstemmed |
Systematics of Nothofagus (Nothofagaceae) based on rDNA spacer sequences (ITS): taxonomic congruence with morphology and plastid sequences |
title_sort |
systematics of nothofagus (nothofagaceae) based on rdna spacer sequences (its): taxonomic congruence with morphology and plastid sequences |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.2307/2446156 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446156 http://onlinelibrary.wiley.com/wol1/doi/10.2307/2446156/fullpdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
American Journal of Botany volume 84, issue 8, page 1137-1155 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/2446156 |
container_title |
American Journal of Botany |
container_volume |
84 |
container_issue |
8 |
container_start_page |
1137 |
op_container_end_page |
1155 |
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1784259339961237504 |