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8 results for “Poa secunda”
Supplementary material 4 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Table 3. Data partition characteristics, summary statistics and models of the phylogenetic analyses : Explanation note: For each data partition (ITS, ETS, trnT-trnL-trnF, rpoB-trnC, MatK) and concatenated dataset (plastid and nuclear), the following are given: number of sequences, number of characters, number of parsimony informative (PI) characters, % parsimony informative characters, maximum parsimony tree length (L), number of most parsimonious trees, consistency index excluding uninformative characters (CI) and retention index (RI). Also given are the models used in the Bayesian analyses as determined using the Akaike information criterion (AIC) in jModeltest.
Supplementary material 3 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Table 2. Poa and outgroup samples used in the phylogenetic analyses : Explanation note: Poa and outgroup samples used in the phylogenetic analyses with subgeneric classification (subtribe for outgroups), voucher information and GenBank Accession numbers for each of the five DNA regions (ITS, ETS, trnT-trnL-trnF, matK, rpoB-trnC).
Supplementary material 1 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Table 1. Chromosome numbers in taxa of Poasubg.Secundae : Explanation note: Chromosome numbers in taxa of Poasubg.Secundae, with RJS' subspecies determinations and original determinations as published or found on herbarium sheets, literature reference, number of counts, voucher collection, country and state or province abbreviation and herbarium where deposited, if known. CI = Carnegie Institution. These numbers show the hexaploid nature of the species complex and the wide and differing ranges of chromosome numbers in each of the P.secunda subspecies.
Supplementary material 2 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
David D. Keck's annotations of taxa here included in Poasecunda : Explanation note: The following taxa recognised by Keck, but included by us in P.secunda s.l., are given in the specimen annotation lists: P.ampla, P.canbyi, P.gracillima, P.incurva, P.juncifolia, P.nevadensis, P.sandbergii and P.scabrella. His lists focused on western Continental United States species but included some mainly non-arctic Alaskan, Canadian and Mexican (Baja California) records and some records of eastern United States species. Copies of the original typed lists are stored in the reprint files in the Grass Lab in the Department of Botany, Smithsonian Institution. Optical character recognition (OCR) was performed on the present selection to allow the lists to be searchable to a large degree. Keck's annotations are considered to be sound and to represent hundreds of historical collections widely distributed in herbaria as vouchers for P.secunda infraspecies. We treat P.ampla, P.juncifolia and P.nevadensis as varieties of P.secundasubsp.juncifolia (vars. ampla, juncifolia and nevadensis, respectively) in our revised classification. The remaining taxa are treated as varieties of P.secundasubsp.secunda , as follows: var. gracillima (P.gracillima), var. scabrella (P.scabrella) and var. secunda (P.canbyi, P.incurva, and P.sandbergii).
Figure 4 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Figure 4 Poasecunda infraspecies illustrations (reproduced from Hitchcock 1935): AP.s.var.ampla panicle and floret BP.s.var.juncifolia panicle and floret CP.s.var.nevadensis panicle and floret DP.s.var.gracillima habit, panicle and floret EP.s.var.scabrella habit, panicles, spikelet and floret F, GP.s.var.secunda habit, panicle and floret variations A, B, C = subsp. juncifoliaD, E, F, G = subsp. secunda. Scale bar: 5 mm for florets, 10 mm for spikelet, 5 cm for habits and panicles (10 cm for E habit and panicles).
Figure 2 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Figure 2 Distribution of Poasecunda subspecies in North America: subsp. secunda (yellow) ; subsp. juncifolia (blue).
Figure 1 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Figure 1 Poasecunda habit and panicles: AP.s.subsp.secundavar.secunda (Soreng 9359) BP.s.subsp.juncifoliavar.ampla (Soreng 9358) C Panicles of subsp. secundavar.secunda (left) and juncifolia var. ampla (right) (Photos. RJS, Deschutes River near Madras, Jefferson Co., Oregon).
Figure 3 from: Soreng RJ, Gillespie LJ (2018) Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA. PhytoKeys 110: 101-121. https://doi.org/10.3897/phytokeys.110.27750
Figure 3 Bayesian 50% majority rule consensus trees of Poa based on plastid (trnT-trnL-trnF, rpoB-trnC, MatK) data (left) and nrDNA ITS and ETS data (right). Bayesian posterior probabilities are shown above branches, maximum parsimony bootstrap values below branches. Outgroups are not shown. Major clades are indicated by colour and capital letters. Taxa shown in blue belong to P.subg.Secundae; those in grey are other taxa of putative hybrid origin that belong to different major clades in plastid and nrDNA trees.
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