Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA
Poasecunda 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...
Published in: | PhytoKeys |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Pensoft Publishers
2018
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232245/ https://doi.org/10.3897/phytokeys.110.27750 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:6232245 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:6232245 2023-05-15T15:02:48+02:00 Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA Soreng, Robert John Gillespie, Lynn J. 2018-11-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232245/ https://doi.org/10.3897/phytokeys.110.27750 en eng Pensoft Publishers http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232245/ http://dx.doi.org/10.3897/phytokeys.110.27750 Robert John Soreng, Lynn J. Gillespie https://creativecommons.org/share-your-work/public-domain/cc0/ This is an open access article distributed under the terms of the CC0 Public Domain Dedication. PDM CC0 Research Article Text 2018 ftpubmed https://doi.org/10.3897/phytokeys.110.27750 2018-11-18T02:17:45Z Poasecunda 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 Poasecunda 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. Text Arctic PubMed Central (PMC) Arctic PhytoKeys 110 101 121 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research Article |
spellingShingle |
Research Article Soreng, Robert John Gillespie, Lynn J. Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
topic_facet |
Research Article |
description |
Poasecunda 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 Poasecunda 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 |
Text |
author |
Soreng, Robert John Gillespie, Lynn J. |
author_facet |
Soreng, Robert John Gillespie, Lynn J. |
author_sort |
Soreng, Robert John |
title |
Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_short |
Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_full |
Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_fullStr |
Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_full_unstemmed |
Poasecunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA |
title_sort |
poasecunda 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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232245/ https://doi.org/10.3897/phytokeys.110.27750 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232245/ http://dx.doi.org/10.3897/phytokeys.110.27750 |
op_rights |
Robert John Soreng, Lynn J. Gillespie https://creativecommons.org/share-your-work/public-domain/cc0/ This is an open access article distributed under the terms of the CC0 Public Domain Dedication. |
op_rightsnorm |
PDM CC0 |
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 |
_version_ |
1766334730009051136 |