Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA
Poa secunda J. Presl. s.l. is a morphologically highly variable bunchgrass that is a valuable forage species in western North America. There has been much controversy as to whether multiple taxa should be recognised and at what rank in this taxonomically challenging apomictic complex. Here we propos...
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ftdoajarticles:oai:doaj.org/article:8048f52281984ea0a808187f176f0dfc 2023-05-15T15:03:18+02:00 Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA Robert John Soreng Lynn J. Gillespie 2018-11-01T00:00:00Z https://doi.org/10.3897/phytokeys.110.27750 https://doaj.org/article/8048f52281984ea0a808187f176f0dfc EN eng Pensoft Publishers https://phytokeys.pensoft.net/articles.php?id=27750 https://phytokeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=27750 https://phytokeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_xml&item_id=27750 https://doaj.org/toc/1314-2011 https://doaj.org/toc/1314-2003 doi:10.3897/phytokeys.110.27750 1314-2003 1314-2011 https://doaj.org/article/8048f52281984ea0a808187f176f0dfc PhytoKeys, Vol 110, Iss , Pp 101-121 (2018) Botany QK1-989 article 2018 ftdoajarticles https://doi.org/10.3897/phytokeys.110.27750 2022-12-31T09:12:48Z Poa secunda J. Presl. s.l. is a morphologically highly variable bunchgrass that is a valuable forage species in western North America. There has been much controversy as to whether multiple taxa should be recognised and at what rank in this taxonomically challenging apomictic complex. Here we propose an infraspecific classification for Poa secunda of six varieties within two subspecies, juncifolia and secunda. New combinations are P. secunda vars. ampla, gracillima, juncifolia, nevadensis and scabrella. Conflicting plastid and nrDNA phylogenies show that P. sect. Secundae is of ancient hybrid origin. Based on this and its distinct morphology, the section is raised to the rank of subgenus. A key is presented for P. secunda infraspecies and closely related non-arctic species. Suppl. materials are provided of chromosome counts for Secundae taxa and D.D. Keck specimen annotations of taxa here included in P. secunda. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic PhytoKeys 110 101 121 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Botany QK1-989 |
spellingShingle |
Botany QK1-989 Robert John Soreng Lynn J. Gillespie Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
topic_facet |
Botany QK1-989 |
description |
Poa secunda J. Presl. s.l. is a morphologically highly variable bunchgrass that is a valuable forage species in western North America. There has been much controversy as to whether multiple taxa should be recognised and at what rank in this taxonomically challenging apomictic complex. Here we propose an infraspecific classification for Poa secunda of six varieties within two subspecies, juncifolia and secunda. New combinations are P. secunda vars. ampla, gracillima, juncifolia, nevadensis and scabrella. Conflicting plastid and nrDNA phylogenies show that P. sect. Secundae is of ancient hybrid origin. Based on this and its distinct morphology, the section is raised to the rank of subgenus. A key is presented for P. secunda infraspecies and closely related non-arctic species. Suppl. materials are provided of chromosome counts for Secundae taxa and D.D. Keck specimen annotations of taxa here included in P. secunda. |
format |
Article in Journal/Newspaper |
author |
Robert John Soreng Lynn J. Gillespie |
author_facet |
Robert John Soreng Lynn J. Gillespie |
author_sort |
Robert John Soreng |
title |
Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_short |
Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_full |
Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_fullStr |
Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_full_unstemmed |
Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_sort |
poa secunda j. presl (poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on dna |
publisher |
Pensoft Publishers |
publishDate |
2018 |
url |
https://doi.org/10.3897/phytokeys.110.27750 https://doaj.org/article/8048f52281984ea0a808187f176f0dfc |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PhytoKeys, Vol 110, Iss , Pp 101-121 (2018) |
op_relation |
https://phytokeys.pensoft.net/articles.php?id=27750 https://phytokeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=27750 https://phytokeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_xml&item_id=27750 https://doaj.org/toc/1314-2011 https://doaj.org/toc/1314-2003 doi:10.3897/phytokeys.110.27750 1314-2003 1314-2011 https://doaj.org/article/8048f52281984ea0a808187f176f0dfc |
op_doi |
https://doi.org/10.3897/phytokeys.110.27750 |
container_title |
PhytoKeys |
container_volume |
110 |
container_start_page |
101 |
op_container_end_page |
121 |
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1766335171816062976 |